./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.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/parallel-min-max-1.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 bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:45:06,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:45:06,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:45:06,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:45:06,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:45:06,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:45:06,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:45:06,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:45:06,558 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:45:06,560 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:45:06,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:45:06,561 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:45:06,561 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:45:06,561 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:45:06,561 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:45:06,562 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:45:06,562 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:45:06,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:45:06,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:45:06,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:45:06,565 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:45:06,566 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:45:06,567 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:45:06,567 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:45:06,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:45:06,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:45:06,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:45:06,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:45:06,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:45:06,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:45:06,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:45:06,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:45:06,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:45:06,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:45:06,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:45:06,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:45:06,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:45:06,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2024-11-22 21:45:06,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:45:06,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:45:06,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:45:06,768 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:45:06,769 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:45:06,770 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-22 21:45:07,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:45:08,080 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:45:08,080 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-11-22 21:45:08,087 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef63b4114/3d333e235c2c4c5cb8714f5179a2eb38/FLAG52ea66159 [2024-11-22 21:45:08,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef63b4114/3d333e235c2c4c5cb8714f5179a2eb38 [2024-11-22 21:45:08,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:45:08,498 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:45:08,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:45:08,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:45:08,504 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:45:08,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f7bd73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08, skipping insertion in model container [2024-11-22 21:45:08,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,521 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:45:08,669 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 21:45:08,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:45:08,677 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:45:08,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:45:08,710 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:45:08,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08 WrapperNode [2024-11-22 21:45:08,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:45:08,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:45:08,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:45:08,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:45:08,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,724 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,742 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 122 [2024-11-22 21:45:08,744 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:45:08,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:45:08,745 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:45:08,745 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:45:08,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,758 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,770 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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 21:45:08,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,784 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,785 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,786 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:45:08,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:45:08,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:45:08,788 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:45:08,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (1/1) ... [2024-11-22 21:45:08,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:45:08,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:08,819 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 21:45:08,822 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 21:45:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:45:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:45:08,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:45:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:45:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:45:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:45:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:45:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:45:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:45:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:45:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:45:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:45:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:45:08,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:45:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:45:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:45:08,865 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 21:45:08,964 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:45:08,965 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:45:09,289 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:45:09,289 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:45:09,421 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:45:09,421 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:45:09,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:45:09 BoogieIcfgContainer [2024-11-22 21:45:09,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:45:09,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:45:09,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:45:09,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:45:09,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:45:08" (1/3) ... [2024-11-22 21:45:09,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1a12a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:45:09, skipping insertion in model container [2024-11-22 21:45:09,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:08" (2/3) ... [2024-11-22 21:45:09,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d1a12a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:45:09, skipping insertion in model container [2024-11-22 21:45:09,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:45:09" (3/3) ... [2024-11-22 21:45:09,431 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2024-11-22 21:45:09,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:45:09,445 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-22 21:45:09,445 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:45:09,497 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:45:09,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2024-11-22 21:45:09,551 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2024-11-22 21:45:09,551 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:45:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 160 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-22 21:45:09,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2024-11-22 21:45:09,558 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2024-11-22 21:45:09,565 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:45:09,572 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;@23a21350, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:45:09,573 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-22 21:45:09,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:45:09,580 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-11-22 21:45:09,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:45:09,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:09,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:09,582 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:09,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:09,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1295196382, now seen corresponding path program 1 times [2024-11-22 21:45:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:09,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267614017] [2024-11-22 21:45:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:09,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:09,829 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 21:45:09,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:09,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267614017] [2024-11-22 21:45:09,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267614017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:09,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:09,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:45:09,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898270303] [2024-11-22 21:45:09,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:09,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:45:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:45:09,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:45:09,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2024-11-22 21:45:09,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 21:45:09,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:09,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2024-11-22 21:45:09,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:10,122 INFO L124 PetriNetUnfolderBase]: 443/945 cut-off events. [2024-11-22 21:45:10,123 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-22 21:45:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 945 events. 443/945 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6068 event pairs, 254 based on Foata normal form. 1/579 useless extension candidates. Maximal degree in co-relation 1516. Up to 615 conditions per place. [2024-11-22 21:45:10,136 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 29 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-22 21:45:10,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 234 flow [2024-11-22 21:45:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:45:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:45:10,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-22 21:45:10,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-11-22 21:45:10,149 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 183 transitions. [2024-11-22 21:45:10,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 234 flow [2024-11-22 21:45:10,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 222 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:45:10,158 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 164 flow [2024-11-22 21:45:10,161 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-11-22 21:45:10,164 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-22 21:45:10,165 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 164 flow [2024-11-22 21:45:10,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 21:45:10,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:10,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:10,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:45:10,166 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:10,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1295196383, now seen corresponding path program 1 times [2024-11-22 21:45:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758255626] [2024-11-22 21:45:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:10,510 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 21:45:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:10,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758255626] [2024-11-22 21:45:10,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758255626] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:10,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:10,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:45:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92309089] [2024-11-22 21:45:10,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:10,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:45:10,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:45:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:45:10,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-22 21:45:10,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 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 21:45:10,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:10,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-22 21:45:10,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:10,864 INFO L124 PetriNetUnfolderBase]: 443/947 cut-off events. [2024-11-22 21:45:10,864 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:45:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 947 events. 443/947 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6042 event pairs, 254 based on Foata normal form. 1/581 useless extension candidates. Maximal degree in co-relation 1566. Up to 615 conditions per place. [2024-11-22 21:45:10,889 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 30 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-22 21:45:10,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 238 flow [2024-11-22 21:45:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:45:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:45:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2024-11-22 21:45:10,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6567460317460317 [2024-11-22 21:45:10,895 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 164 flow. Second operand 6 states and 331 transitions. [2024-11-22 21:45:10,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 238 flow [2024-11-22 21:45:10,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:10,900 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 180 flow [2024-11-22 21:45:10,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-11-22 21:45:10,900 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2024-11-22 21:45:10,901 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 180 flow [2024-11-22 21:45:10,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 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 21:45:10,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:10,901 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:10,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:45:10,901 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:10,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash -856776642, now seen corresponding path program 1 times [2024-11-22 21:45:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:10,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507466266] [2024-11-22 21:45:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:11,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507466266] [2024-11-22 21:45:11,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507466266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:11,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213383539] [2024-11-22 21:45:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:11,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:11,116 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 21:45:11,118 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 21:45:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:11,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:45:11,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:11,264 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 21:45:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:11,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:11,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213383539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:11,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:11,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-22 21:45:11,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306687053] [2024-11-22 21:45:11,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:11,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:45:11,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:11,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:45:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:45:12,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-22 21:45:12,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 180 flow. Second operand has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 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 21:45:12,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:12,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-22 21:45:12,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:12,596 INFO L124 PetriNetUnfolderBase]: 444/949 cut-off events. [2024-11-22 21:45:12,597 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:45:12,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 949 events. 444/949 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6052 event pairs, 254 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 1582. Up to 614 conditions per place. [2024-11-22 21:45:12,602 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 25 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-11-22 21:45:12,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 262 flow [2024-11-22 21:45:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:45:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:45:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 529 transitions. [2024-11-22 21:45:12,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6297619047619047 [2024-11-22 21:45:12,607 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 180 flow. Second operand 10 states and 529 transitions. [2024-11-22 21:45:12,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 262 flow [2024-11-22 21:45:12,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:12,610 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 204 flow [2024-11-22 21:45:12,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=204, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2024-11-22 21:45:12,611 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-22 21:45:12,611 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 204 flow [2024-11-22 21:45:12,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 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 21:45:12,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:12,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:12,619 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 21:45:12,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:12,813 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:12,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:12,814 INFO L85 PathProgramCache]: Analyzing trace with hash -790271474, now seen corresponding path program 1 times [2024-11-22 21:45:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:12,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295380471] [2024-11-22 21:45:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:12,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295380471] [2024-11-22 21:45:12,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295380471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:12,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:12,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:12,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086152475] [2024-11-22 21:45:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:12,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:12,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:12,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:12,910 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-22 21:45:12,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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 21:45:12,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:12,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-22 21:45:12,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,068 INFO L124 PetriNetUnfolderBase]: 972/1695 cut-off events. [2024-11-22 21:45:13,068 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-22 21:45:13,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 1695 events. 972/1695 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9879 event pairs, 700 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 3059. Up to 1314 conditions per place. [2024-11-22 21:45:13,077 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 39 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-11-22 21:45:13,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 274 flow [2024-11-22 21:45:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-22 21:45:13,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-22 21:45:13,078 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 204 flow. Second operand 4 states and 192 transitions. [2024-11-22 21:45:13,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 274 flow [2024-11-22 21:45:13,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 238 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-22 21:45:13,081 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 160 flow [2024-11-22 21:45:13,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-22 21:45:13,082 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -10 predicate places. [2024-11-22 21:45:13,082 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 160 flow [2024-11-22 21:45:13,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 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 21:45:13,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,083 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:45:13,083 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:13,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:13,084 INFO L85 PathProgramCache]: Analyzing trace with hash -790271473, now seen corresponding path program 1 times [2024-11-22 21:45:13,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:13,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633047714] [2024-11-22 21:45:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,170 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 21:45:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:13,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633047714] [2024-11-22 21:45:13,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633047714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246675102] [2024-11-22 21:45:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:13,173 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 21:45:13,174 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 21:45:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 21:45:13,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:13,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:45:13,271 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 21:45:13,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:13,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246675102] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:13,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:45:13,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-22 21:45:13,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905761529] [2024-11-22 21:45:13,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:13,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:45:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:45:13,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:45:13,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2024-11-22 21:45:13,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 21:45:13,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2024-11-22 21:45:13,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,495 INFO L124 PetriNetUnfolderBase]: 602/1159 cut-off events. [2024-11-22 21:45:13,495 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:45:13,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056 conditions, 1159 events. 602/1159 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7153 event pairs, 377 based on Foata normal form. 0/811 useless extension candidates. Maximal degree in co-relation 2014. Up to 835 conditions per place. [2024-11-22 21:45:13,501 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 34 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2024-11-22 21:45:13,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 230 flow [2024-11-22 21:45:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-22 21:45:13,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-11-22 21:45:13,504 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 160 flow. Second operand 5 states and 268 transitions. [2024-11-22 21:45:13,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 230 flow [2024-11-22 21:45:13,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:13,506 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 158 flow [2024-11-22 21:45:13,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-22 21:45:13,507 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2024-11-22 21:45:13,507 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 158 flow [2024-11-22 21:45:13,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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 21:45:13,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,515 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 21:45:13,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:13,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:13,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:13,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1366120631, now seen corresponding path program 1 times [2024-11-22 21:45:13,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:13,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121006619] [2024-11-22 21:45:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,768 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 21:45:13,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:13,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121006619] [2024-11-22 21:45:13,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121006619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:13,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435181991] [2024-11-22 21:45:13,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:13,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:45:13,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:13,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:45:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:45:13,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-22 21:45:13,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 21:45:13,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-22 21:45:13,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,844 INFO L124 PetriNetUnfolderBase]: 443/876 cut-off events. [2024-11-22 21:45:13,844 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:45:13,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 876 events. 443/876 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5277 event pairs, 254 based on Foata normal form. 1/583 useless extension candidates. Maximal degree in co-relation 1495. Up to 624 conditions per place. [2024-11-22 21:45:13,849 INFO L140 encePairwiseOnDemand]: 82/84 looper letters, 37 selfloop transitions, 0 changer transitions 1/71 dead transitions. [2024-11-22 21:45:13,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 234 flow [2024-11-22 21:45:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:45:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:45:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2024-11-22 21:45:13,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7182539682539683 [2024-11-22 21:45:13,850 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 158 flow. Second operand 3 states and 181 transitions. [2024-11-22 21:45:13,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 234 flow [2024-11-22 21:45:13,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:13,851 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 152 flow [2024-11-22 21:45:13,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-22 21:45:13,852 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2024-11-22 21:45:13,852 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 152 flow [2024-11-22 21:45:13,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 21:45:13,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:45:13,852 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:13,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash 787646930, now seen corresponding path program 1 times [2024-11-22 21:45:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472625056] [2024-11-22 21:45:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,926 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 21:45:13,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:13,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472625056] [2024-11-22 21:45:13,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472625056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:13,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:13,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:45:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320603042] [2024-11-22 21:45:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:13,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:45:13,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:45:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:45:13,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-22 21:45:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 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 21:45:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-22 21:45:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:14,193 INFO L124 PetriNetUnfolderBase]: 1756/2797 cut-off events. [2024-11-22 21:45:14,193 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 21:45:14,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 2797 events. 1756/2797 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15972 event pairs, 885 based on Foata normal form. 0/2351 useless extension candidates. Maximal degree in co-relation 5338. Up to 1616 conditions per place. [2024-11-22 21:45:14,207 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 56 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-11-22 21:45:14,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 320 flow [2024-11-22 21:45:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:45:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:45:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 295 transitions. [2024-11-22 21:45:14,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2024-11-22 21:45:14,209 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 152 flow. Second operand 6 states and 295 transitions. [2024-11-22 21:45:14,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 320 flow [2024-11-22 21:45:14,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 318 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:45:14,210 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 181 flow [2024-11-22 21:45:14,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2024-11-22 21:45:14,211 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-22 21:45:14,211 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 181 flow [2024-11-22 21:45:14,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 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 21:45:14,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:14,212 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:14,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:45:14,212 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:14,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash 677070547, now seen corresponding path program 1 times [2024-11-22 21:45:14,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954727456] [2024-11-22 21:45:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,314 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 21:45:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954727456] [2024-11-22 21:45:14,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954727456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745860843] [2024-11-22 21:45:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:14,316 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 21:45:14,318 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 21:45:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 21:45:14,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:14,425 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 21:45:14,425 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:45:14,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745860843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:14,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:45:14,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-22 21:45:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753640414] [2024-11-22 21:45:14,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:14,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:14,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:14,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:45:14,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 84 [2024-11-22 21:45:14,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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 21:45:14,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:14,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 84 [2024-11-22 21:45:14,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:14,635 INFO L124 PetriNetUnfolderBase]: 1327/2403 cut-off events. [2024-11-22 21:45:14,635 INFO L125 PetriNetUnfolderBase]: For 188/268 co-relation queries the response was YES. [2024-11-22 21:45:14,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 2403 events. 1327/2403 cut-off events. For 188/268 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15987 event pairs, 710 based on Foata normal form. 162/2203 useless extension candidates. Maximal degree in co-relation 4818. Up to 1332 conditions per place. [2024-11-22 21:45:14,648 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 55 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2024-11-22 21:45:14,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 88 transitions, 343 flow [2024-11-22 21:45:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-22 21:45:14,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-22 21:45:14,649 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 181 flow. Second operand 4 states and 224 transitions. [2024-11-22 21:45:14,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 88 transitions, 343 flow [2024-11-22 21:45:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:14,651 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 191 flow [2024-11-22 21:45:14,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-11-22 21:45:14,652 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2024-11-22 21:45:14,652 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 191 flow [2024-11-22 21:45:14,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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 21:45:14,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:14,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:14,659 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 21:45:14,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:14,854 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:14,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash -52194088, now seen corresponding path program 1 times [2024-11-22 21:45:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729786107] [2024-11-22 21:45:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729786107] [2024-11-22 21:45:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729786107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712462454] [2024-11-22 21:45:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:14,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:14,942 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 21:45:14,943 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 21:45:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:45:14,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:15,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:15,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712462454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:15,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:15,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:45:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136579335] [2024-11-22 21:45:15,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:15,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:45:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:45:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:45:15,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2024-11-22 21:45:15,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 191 flow. Second operand has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 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 21:45:15,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:15,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2024-11-22 21:45:15,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:15,515 INFO L124 PetriNetUnfolderBase]: 1834/3405 cut-off events. [2024-11-22 21:45:15,516 INFO L125 PetriNetUnfolderBase]: For 442/506 co-relation queries the response was YES. [2024-11-22 21:45:15,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7291 conditions, 3405 events. 1834/3405 cut-off events. For 442/506 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24506 event pairs, 976 based on Foata normal form. 108/3023 useless extension candidates. Maximal degree in co-relation 7285. Up to 1457 conditions per place. [2024-11-22 21:45:15,537 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 81 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-11-22 21:45:15,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 527 flow [2024-11-22 21:45:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:45:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:45:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 468 transitions. [2024-11-22 21:45:15,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-22 21:45:15,539 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 191 flow. Second operand 8 states and 468 transitions. [2024-11-22 21:45:15,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 527 flow [2024-11-22 21:45:15,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 514 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:15,544 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 247 flow [2024-11-22 21:45:15,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2024-11-22 21:45:15,545 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2024-11-22 21:45:15,546 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 247 flow [2024-11-22 21:45:15,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 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 21:45:15,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:15,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:15,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:45:15,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:15,747 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:15,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:15,747 INFO L85 PathProgramCache]: Analyzing trace with hash -606544039, now seen corresponding path program 2 times [2024-11-22 21:45:15,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:15,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876938649] [2024-11-22 21:45:15,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:15,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:15,779 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:15,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:45:16,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876938649] [2024-11-22 21:45:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876938649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522494640] [2024-11-22 21:45:16,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:16,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:16,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:16,053 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 21:45:16,054 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 21:45:16,106 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:16,106 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:16,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:45:16,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:16,234 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 21:45:16,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:16,339 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 24 treesize of output 20 [2024-11-22 21:45:16,386 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 21:45:16,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522494640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:16,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:16,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2024-11-22 21:45:16,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864421443] [2024-11-22 21:45:16,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:16,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:45:16,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:16,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:45:16,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:45:17,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-22 21:45:17,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 247 flow. Second operand has 22 states, 22 states have (on average 39.77272727272727) internal successors, (875), 22 states have internal predecessors, (875), 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 21:45:17,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:17,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-22 21:45:17,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:18,378 INFO L124 PetriNetUnfolderBase]: 5525/8217 cut-off events. [2024-11-22 21:45:18,378 INFO L125 PetriNetUnfolderBase]: For 2082/2395 co-relation queries the response was YES. [2024-11-22 21:45:18,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19451 conditions, 8217 events. 5525/8217 cut-off events. For 2082/2395 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 49636 event pairs, 764 based on Foata normal form. 459/7885 useless extension candidates. Maximal degree in co-relation 19442. Up to 1364 conditions per place. [2024-11-22 21:45:18,419 INFO L140 encePairwiseOnDemand]: 68/84 looper letters, 175 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-11-22 21:45:18,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 223 transitions, 1037 flow [2024-11-22 21:45:18,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:45:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:45:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 777 transitions. [2024-11-22 21:45:18,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-11-22 21:45:18,421 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 247 flow. Second operand 16 states and 777 transitions. [2024-11-22 21:45:18,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 223 transitions, 1037 flow [2024-11-22 21:45:18,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 223 transitions, 1022 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:18,427 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 326 flow [2024-11-22 21:45:18,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=326, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2024-11-22 21:45:18,428 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2024-11-22 21:45:18,428 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 326 flow [2024-11-22 21:45:18,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 39.77272727272727) internal successors, (875), 22 states have internal predecessors, (875), 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 21:45:18,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:18,429 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:18,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:18,629 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,SelfDestructingSolverStorable9 [2024-11-22 21:45:18,629 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:18,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1774014041, now seen corresponding path program 1 times [2024-11-22 21:45:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465201602] [2024-11-22 21:45:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465201602] [2024-11-22 21:45:18,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465201602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:18,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286101744] [2024-11-22 21:45:18,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:18,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:18,774 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 21:45:18,775 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 21:45:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:45:18,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,895 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286101744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:18,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:18,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:45:18,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43298795] [2024-11-22 21:45:18,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:18,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:45:18,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:45:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:45:19,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2024-11-22 21:45:19,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 326 flow. Second operand has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 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 21:45:19,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:19,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2024-11-22 21:45:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:19,415 INFO L124 PetriNetUnfolderBase]: 2558/4482 cut-off events. [2024-11-22 21:45:19,415 INFO L125 PetriNetUnfolderBase]: For 3506/3533 co-relation queries the response was YES. [2024-11-22 21:45:19,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11515 conditions, 4482 events. 2558/4482 cut-off events. For 3506/3533 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30261 event pairs, 1460 based on Foata normal form. 46/3886 useless extension candidates. Maximal degree in co-relation 11504. Up to 2355 conditions per place. [2024-11-22 21:45:19,438 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 81 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-22 21:45:19,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 680 flow [2024-11-22 21:45:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:45:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:45:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 466 transitions. [2024-11-22 21:45:19,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6934523809523809 [2024-11-22 21:45:19,440 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 326 flow. Second operand 8 states and 466 transitions. [2024-11-22 21:45:19,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 680 flow [2024-11-22 21:45:19,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 128 transitions, 568 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-11-22 21:45:19,446 INFO L231 Difference]: Finished difference. Result has 93 places, 88 transitions, 315 flow [2024-11-22 21:45:19,446 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=93, PETRI_TRANSITIONS=88} [2024-11-22 21:45:19,447 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-22 21:45:19,447 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 88 transitions, 315 flow [2024-11-22 21:45:19,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 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 21:45:19,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:19,448 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:19,459 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 21:45:19,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:19,648 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:19,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1619655834, now seen corresponding path program 2 times [2024-11-22 21:45:19,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:19,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244729942] [2024-11-22 21:45:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:19,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:19,661 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:19,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244729942] [2024-11-22 21:45:19,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244729942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391746332] [2024-11-22 21:45:19,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:19,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:19,822 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 21:45:19,823 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 21:45:19,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:19,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:19,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:45:19,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:19,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:45:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:20,049 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:20,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391746332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:20,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:20,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-22 21:45:20,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837084714] [2024-11-22 21:45:20,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:20,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:45:20,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:20,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:45:20,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:45:20,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2024-11-22 21:45:20,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 88 transitions, 315 flow. Second operand has 20 states, 20 states have (on average 40.05) internal successors, (801), 20 states have internal predecessors, (801), 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 21:45:20,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:20,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2024-11-22 21:45:20,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:21,772 INFO L124 PetriNetUnfolderBase]: 5774/8669 cut-off events. [2024-11-22 21:45:21,773 INFO L125 PetriNetUnfolderBase]: For 3560/3707 co-relation queries the response was YES. [2024-11-22 21:45:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22011 conditions, 8669 events. 5774/8669 cut-off events. For 3560/3707 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 52085 event pairs, 890 based on Foata normal form. 280/8069 useless extension candidates. Maximal degree in co-relation 22000. Up to 3067 conditions per place. [2024-11-22 21:45:21,812 INFO L140 encePairwiseOnDemand]: 71/84 looper letters, 148 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-11-22 21:45:21,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 193 transitions, 1018 flow [2024-11-22 21:45:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:45:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:45:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 484 transitions. [2024-11-22 21:45:21,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-22 21:45:21,814 INFO L175 Difference]: Start difference. First operand has 93 places, 88 transitions, 315 flow. Second operand 10 states and 484 transitions. [2024-11-22 21:45:21,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 193 transitions, 1018 flow [2024-11-22 21:45:21,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 193 transitions, 1003 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:21,824 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 378 flow [2024-11-22 21:45:21,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=378, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2024-11-22 21:45:21,825 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 13 predicate places. [2024-11-22 21:45:21,825 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 378 flow [2024-11-22 21:45:21,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 40.05) internal successors, (801), 20 states have internal predecessors, (801), 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 21:45:21,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:21,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:21,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:22,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:22,026 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:22,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -788636757, now seen corresponding path program 1 times [2024-11-22 21:45:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:22,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297491411] [2024-11-22 21:45:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:22,075 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 21:45:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297491411] [2024-11-22 21:45:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297491411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:22,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:45:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186354148] [2024-11-22 21:45:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:22,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:22,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-22 21:45:22,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 21:45:22,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:22,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-22 21:45:22,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:22,393 INFO L124 PetriNetUnfolderBase]: 2827/5071 cut-off events. [2024-11-22 21:45:22,394 INFO L125 PetriNetUnfolderBase]: For 4465/4625 co-relation queries the response was YES. [2024-11-22 21:45:22,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13703 conditions, 5071 events. 2827/5071 cut-off events. For 4465/4625 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35629 event pairs, 1420 based on Foata normal form. 197/4258 useless extension candidates. Maximal degree in co-relation 13691. Up to 2381 conditions per place. [2024-11-22 21:45:22,424 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 65 selfloop transitions, 5 changer transitions 0/109 dead transitions. [2024-11-22 21:45:22,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 109 transitions, 605 flow [2024-11-22 21:45:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 243 transitions. [2024-11-22 21:45:22,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7232142857142857 [2024-11-22 21:45:22,426 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 378 flow. Second operand 4 states and 243 transitions. [2024-11-22 21:45:22,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 109 transitions, 605 flow [2024-11-22 21:45:22,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 549 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-22 21:45:22,440 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 337 flow [2024-11-22 21:45:22,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=337, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-11-22 21:45:22,440 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2024-11-22 21:45:22,441 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 337 flow [2024-11-22 21:45:22,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 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 21:45:22,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:22,441 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:22,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:45:22,441 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:22,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:22,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1993966815, now seen corresponding path program 1 times [2024-11-22 21:45:22,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:22,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183256436] [2024-11-22 21:45:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:22,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183256436] [2024-11-22 21:45:22,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183256436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:22,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:22,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:45:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113347468] [2024-11-22 21:45:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:22,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:22,510 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2024-11-22 21:45:22,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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 21:45:22,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:22,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2024-11-22 21:45:22,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:22,764 INFO L124 PetriNetUnfolderBase]: 2345/4419 cut-off events. [2024-11-22 21:45:22,764 INFO L125 PetriNetUnfolderBase]: For 3237/3349 co-relation queries the response was YES. [2024-11-22 21:45:22,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 4419 events. 2345/4419 cut-off events. For 3237/3349 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 31348 event pairs, 969 based on Foata normal form. 332/4038 useless extension candidates. Maximal degree in co-relation 10858. Up to 1486 conditions per place. [2024-11-22 21:45:22,785 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 58 selfloop transitions, 5 changer transitions 0/102 dead transitions. [2024-11-22 21:45:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 492 flow [2024-11-22 21:45:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 242 transitions. [2024-11-22 21:45:22,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7202380952380952 [2024-11-22 21:45:22,790 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 337 flow. Second operand 4 states and 242 transitions. [2024-11-22 21:45:22,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 492 flow [2024-11-22 21:45:22,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 478 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:22,796 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 307 flow [2024-11-22 21:45:22,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2024-11-22 21:45:22,797 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-22 21:45:22,797 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 307 flow [2024-11-22 21:45:22,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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 21:45:22,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:22,797 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:22,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:45:22,798 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:22,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash -811792249, now seen corresponding path program 1 times [2024-11-22 21:45:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929590126] [2024-11-22 21:45:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:22,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:22,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929590126] [2024-11-22 21:45:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929590126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:22,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284303936] [2024-11-22 21:45:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:22,963 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 21:45:22,963 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 21:45:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:23,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:45:23,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:23,080 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:45:23,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284303936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:23,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:45:23,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-22 21:45:23,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074714700] [2024-11-22 21:45:23,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:23,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:45:23,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:45:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:45:23,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-22 21:45:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 307 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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 21:45:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-22 21:45:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:23,518 INFO L124 PetriNetUnfolderBase]: 3206/5692 cut-off events. [2024-11-22 21:45:23,518 INFO L125 PetriNetUnfolderBase]: For 3826/4027 co-relation queries the response was YES. [2024-11-22 21:45:23,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14270 conditions, 5692 events. 3206/5692 cut-off events. For 3826/4027 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 39371 event pairs, 1347 based on Foata normal form. 2/4941 useless extension candidates. Maximal degree in co-relation 14259. Up to 2725 conditions per place. [2024-11-22 21:45:23,543 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 113 selfloop transitions, 10 changer transitions 0/155 dead transitions. [2024-11-22 21:45:23,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 826 flow [2024-11-22 21:45:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:45:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:45:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 400 transitions. [2024-11-22 21:45:23,544 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2024-11-22 21:45:23,544 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 307 flow. Second operand 7 states and 400 transitions. [2024-11-22 21:45:23,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 826 flow [2024-11-22 21:45:23,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 796 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:23,552 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 349 flow [2024-11-22 21:45:23,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-11-22 21:45:23,553 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 14 predicate places. [2024-11-22 21:45:23,553 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 349 flow [2024-11-22 21:45:23,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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 21:45:23,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:23,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:23,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:23,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 21:45:23,758 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:23,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1603314530, now seen corresponding path program 1 times [2024-11-22 21:45:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:23,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118123896] [2024-11-22 21:45:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:23,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:23,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118123896] [2024-11-22 21:45:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118123896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:23,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381103261] [2024-11-22 21:45:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:23,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:23,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:23,898 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 21:45:23,900 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 21:45:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:23,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:45:23,968 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:23,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:24,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:24,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:24,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381103261] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:24,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:45:24,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 7] total 10 [2024-11-22 21:45:24,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126654449] [2024-11-22 21:45:24,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:24,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:45:24,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:24,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:45:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:45:24,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2024-11-22 21:45:24,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 349 flow. Second operand has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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 21:45:24,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:24,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2024-11-22 21:45:24,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:24,632 INFO L124 PetriNetUnfolderBase]: 2798/5086 cut-off events. [2024-11-22 21:45:24,633 INFO L125 PetriNetUnfolderBase]: For 3818/4042 co-relation queries the response was YES. [2024-11-22 21:45:24,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13752 conditions, 5086 events. 2798/5086 cut-off events. For 3818/4042 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 34858 event pairs, 918 based on Foata normal form. 138/4710 useless extension candidates. Maximal degree in co-relation 13739. Up to 1784 conditions per place. [2024-11-22 21:45:24,657 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 123 selfloop transitions, 10 changer transitions 0/168 dead transitions. [2024-11-22 21:45:24,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 928 flow [2024-11-22 21:45:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:45:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:45:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 395 transitions. [2024-11-22 21:45:24,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6717687074829932 [2024-11-22 21:45:24,659 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 349 flow. Second operand 7 states and 395 transitions. [2024-11-22 21:45:24,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 928 flow [2024-11-22 21:45:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 168 transitions, 917 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:24,672 INFO L231 Difference]: Finished difference. Result has 102 places, 93 transitions, 383 flow [2024-11-22 21:45:24,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=383, PETRI_PLACES=102, PETRI_TRANSITIONS=93} [2024-11-22 21:45:24,672 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 18 predicate places. [2024-11-22 21:45:24,672 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 93 transitions, 383 flow [2024-11-22 21:45:24,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.833333333333336) internal successors, (299), 6 states have internal predecessors, (299), 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 21:45:24,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:24,673 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:24,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:45:24,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:45:24,877 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:24,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash 908483081, now seen corresponding path program 1 times [2024-11-22 21:45:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:24,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917111749] [2024-11-22 21:45:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:25,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:25,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917111749] [2024-11-22 21:45:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917111749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109777075] [2024-11-22 21:45:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:25,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:25,074 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 21:45:25,075 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 21:45:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:25,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 21:45:25,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:25,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109777075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:25,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 12 [2024-11-22 21:45:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471147967] [2024-11-22 21:45:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:25,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:45:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:45:25,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:45:25,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2024-11-22 21:45:25,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 93 transitions, 383 flow. Second operand has 12 states, 12 states have (on average 42.5) internal successors, (510), 12 states have internal predecessors, (510), 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 21:45:25,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:25,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2024-11-22 21:45:25,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:26,421 INFO L124 PetriNetUnfolderBase]: 6439/11554 cut-off events. [2024-11-22 21:45:26,421 INFO L125 PetriNetUnfolderBase]: For 8993/9381 co-relation queries the response was YES. [2024-11-22 21:45:26,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32977 conditions, 11554 events. 6439/11554 cut-off events. For 8993/9381 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 85334 event pairs, 1280 based on Foata normal form. 251/10911 useless extension candidates. Maximal degree in co-relation 32962. Up to 5313 conditions per place. [2024-11-22 21:45:26,462 INFO L140 encePairwiseOnDemand]: 70/84 looper letters, 120 selfloop transitions, 24 changer transitions 54/227 dead transitions. [2024-11-22 21:45:26,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 227 transitions, 1281 flow [2024-11-22 21:45:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:45:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:45:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 669 transitions. [2024-11-22 21:45:26,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-11-22 21:45:26,464 INFO L175 Difference]: Start difference. First operand has 102 places, 93 transitions, 383 flow. Second operand 15 states and 669 transitions. [2024-11-22 21:45:26,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 227 transitions, 1281 flow [2024-11-22 21:45:26,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 227 transitions, 1259 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:26,507 INFO L231 Difference]: Finished difference. Result has 117 places, 107 transitions, 489 flow [2024-11-22 21:45:26,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=489, PETRI_PLACES=117, PETRI_TRANSITIONS=107} [2024-11-22 21:45:26,507 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 33 predicate places. [2024-11-22 21:45:26,507 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 107 transitions, 489 flow [2024-11-22 21:45:26,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 42.5) internal successors, (510), 12 states have internal predecessors, (510), 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 21:45:26,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:26,508 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:26,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:26,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:45:26,708 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:26,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash -131756939, now seen corresponding path program 2 times [2024-11-22 21:45:26,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:26,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447500299] [2024-11-22 21:45:26,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:26,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:26,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:26,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:26,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447500299] [2024-11-22 21:45:26,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447500299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:26,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982348477] [2024-11-22 21:45:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:26,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:26,982 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 21:45:26,983 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 21:45:27,046 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:27,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:27,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:45:27,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:27,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:27,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:27,331 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:45:27,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2024-11-22 21:45:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:27,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982348477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:27,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:27,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 9] total 25 [2024-11-22 21:45:27,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20893016] [2024-11-22 21:45:27,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:27,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:45:27,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:27,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:45:27,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:45:28,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2024-11-22 21:45:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 107 transitions, 489 flow. Second operand has 25 states, 25 states have (on average 33.88) internal successors, (847), 25 states have internal predecessors, (847), 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 21:45:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2024-11-22 21:45:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:42,851 INFO L124 PetriNetUnfolderBase]: 53473/81966 cut-off events. [2024-11-22 21:45:42,851 INFO L125 PetriNetUnfolderBase]: For 89019/90003 co-relation queries the response was YES. [2024-11-22 21:45:43,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248492 conditions, 81966 events. 53473/81966 cut-off events. For 89019/90003 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 617831 event pairs, 725 based on Foata normal form. 126/78847 useless extension candidates. Maximal degree in co-relation 248472. Up to 10763 conditions per place. [2024-11-22 21:45:43,280 INFO L140 encePairwiseOnDemand]: 57/84 looper letters, 971 selfloop transitions, 455 changer transitions 1093/2531 dead transitions. [2024-11-22 21:45:43,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 2531 transitions, 15644 flow [2024-11-22 21:45:43,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2024-11-22 21:45:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2024-11-22 21:45:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 9095 transitions. [2024-11-22 21:45:43,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44926891918593165 [2024-11-22 21:45:43,297 INFO L175 Difference]: Start difference. First operand has 117 places, 107 transitions, 489 flow. Second operand 241 states and 9095 transitions. [2024-11-22 21:45:43,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 2531 transitions, 15644 flow [2024-11-22 21:45:44,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2531 transitions, 15635 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:44,222 INFO L231 Difference]: Finished difference. Result has 509 places, 644 transitions, 5634 flow [2024-11-22 21:45:44,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=241, PETRI_FLOW=5634, PETRI_PLACES=509, PETRI_TRANSITIONS=644} [2024-11-22 21:45:44,223 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 425 predicate places. [2024-11-22 21:45:44,223 INFO L471 AbstractCegarLoop]: Abstraction has has 509 places, 644 transitions, 5634 flow [2024-11-22 21:45:44,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 33.88) internal successors, (847), 25 states have internal predecessors, (847), 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 21:45:44,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:44,224 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:44,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:44,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:45:44,428 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:45:44,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2016139771, now seen corresponding path program 3 times [2024-11-22 21:45:44,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:44,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604767352] [2024-11-22 21:45:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:45:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:44,439 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:45:44,439 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:45:44,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:44,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604767352] [2024-11-22 21:45:44,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604767352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:44,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:44,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:45:44,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847406500] [2024-11-22 21:45:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:44,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:45:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:45:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:45:44,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2024-11-22 21:45:44,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 644 transitions, 5634 flow. Second operand has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 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 21:45:44,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:44,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2024-11-22 21:45:44,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:54,019 INFO L124 PetriNetUnfolderBase]: 20771/36144 cut-off events. [2024-11-22 21:45:54,019 INFO L125 PetriNetUnfolderBase]: For 3812113/3815706 co-relation queries the response was YES. [2024-11-22 21:45:54,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271838 conditions, 36144 events. 20771/36144 cut-off events. For 3812113/3815706 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 298556 event pairs, 7176 based on Foata normal form. 624/35540 useless extension candidates. Maximal degree in co-relation 271661. Up to 19968 conditions per place. [2024-11-22 21:45:55,042 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 524 selfloop transitions, 49 changer transitions 224/996 dead transitions. [2024-11-22 21:45:55,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 996 transitions, 10296 flow [2024-11-22 21:45:55,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:45:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:45:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 554 transitions. [2024-11-22 21:45:55,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5995670995670995 [2024-11-22 21:45:55,044 INFO L175 Difference]: Start difference. First operand has 509 places, 644 transitions, 5634 flow. Second operand 11 states and 554 transitions. [2024-11-22 21:45:55,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 996 transitions, 10296 flow [2024-11-22 21:46:08,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 996 transitions, 8876 flow, removed 519 selfloop flow, removed 53 redundant places. [2024-11-22 21:46:08,216 INFO L231 Difference]: Finished difference. Result has 380 places, 676 transitions, 5389 flow [2024-11-22 21:46:08,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5389, PETRI_PLACES=380, PETRI_TRANSITIONS=676} [2024-11-22 21:46:08,217 INFO L277 CegarLoopForPetriNet]: 84 programPoint places, 296 predicate places. [2024-11-22 21:46:08,217 INFO L471 AbstractCegarLoop]: Abstraction has has 380 places, 676 transitions, 5389 flow [2024-11-22 21:46:08,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 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 21:46:08,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:08,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:46:08,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:46:08,217 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-22 21:46:08,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:08,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1429737931, now seen corresponding path program 4 times [2024-11-22 21:46:08,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:08,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786250403] [2024-11-22 21:46:08,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:46:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:08,234 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:46:08,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:46:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:46:08,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:08,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786250403] [2024-11-22 21:46:08,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786250403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:08,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173518440] [2024-11-22 21:46:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:46:08,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:08,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:08,398 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 21:46:08,399 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 21:46:08,462 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:46:08,463 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:46:08,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:46:08,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:08,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:46:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:46:08,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:46:08,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173518440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:08,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:08,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 21 [2024-11-22 21:46:08,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770093791] [2024-11-22 21:46:08,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:08,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:46:08,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:08,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:46:08,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:46:09,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 84 [2024-11-22 21:46:09,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 676 transitions, 5389 flow. Second operand has 21 states, 21 states have (on average 37.19047619047619) internal successors, (781), 21 states have internal predecessors, (781), 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 21:46:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 84 [2024-11-22 21:46:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:24,737 INFO L124 PetriNetUnfolderBase]: 37454/61347 cut-off events. [2024-11-22 21:46:24,737 INFO L125 PetriNetUnfolderBase]: For 5872420/5876968 co-relation queries the response was YES. [2024-11-22 21:46:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404269 conditions, 61347 events. 37454/61347 cut-off events. For 5872420/5876968 co-relation queries the response was YES. Maximal size of possible extension queue 1238. Compared 493668 event pairs, 4173 based on Foata normal form. 538/60708 useless extension candidates. Maximal degree in co-relation 404128. Up to 18420 conditions per place. [2024-11-22 21:46:26,193 INFO L140 encePairwiseOnDemand]: 64/84 looper letters, 848 selfloop transitions, 340 changer transitions 456/1746 dead transitions. [2024-11-22 21:46:26,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1746 transitions, 18171 flow [2024-11-22 21:46:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-22 21:46:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2024-11-22 21:46:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 3375 transitions. [2024-11-22 21:46:26,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46719269102990035 [2024-11-22 21:46:26,199 INFO L175 Difference]: Start difference. First operand has 380 places, 676 transitions, 5389 flow. Second operand 86 states and 3375 transitions. [2024-11-22 21:46:26,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1746 transitions, 18171 flow