./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:17:20,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:17:20,723 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:17:20,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:17:20,732 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:17:20,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:17:20,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:17:20,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:17:20,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:17:20,759 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:17:20,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:17:20,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:17:20,760 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:17:20,761 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:17:20,761 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:17:20,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:17:20,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:17:20,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:17:20,763 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:17:20,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:17:20,763 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:17:20,764 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:17:20,765 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:17:20,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:17:20,765 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:17:20,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:17:20,766 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:17:20,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:17:20,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:17:20,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:17:20,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:17:20,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:17:20,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:17:20,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:17:20,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:17:20,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:17:20,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:17:20,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:17:20,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:17:20,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:17:20,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:17:20,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:17:20,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2024-11-19 09:17:21,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:17:21,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:17:21,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:17:21,062 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:17:21,062 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:17:21,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-19 09:17:22,559 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:17:22,857 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:17:22,857 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-19 09:17:22,885 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72aff1e96/64456c31cc59479ba5fbd13b1cb0cf04/FLAGe6955d1dc [2024-11-19 09:17:22,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72aff1e96/64456c31cc59479ba5fbd13b1cb0cf04 [2024-11-19 09:17:22,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:17:22,907 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:17:22,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:17:22,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:17:22,914 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:17:22,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:22" (1/1) ... [2024-11-19 09:17:22,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a0b5eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:22, skipping insertion in model container [2024-11-19 09:17:22,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:22" (1/1) ... [2024-11-19 09:17:22,969 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:17:23,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:17:23,437 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:17:23,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:17:23,572 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:17:23,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23 WrapperNode [2024-11-19 09:17:23,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:17:23,573 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:17:23,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:17:23,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:17:23,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,631 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-11-19 09:17:23,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:17:23,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:17:23,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:17:23,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:17:23,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,646 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,657 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-19 09:17:23,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,668 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:17:23,672 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:17:23,672 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:17:23,672 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:17:23,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (1/1) ... [2024-11-19 09:17:23,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:17:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:23,706 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) [2024-11-19 09:17:23,710 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 [2024-11-19 09:17:23,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-19 09:17:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-19 09:17:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-19 09:17:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:17:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:17:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:17:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:17:23,758 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:17:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:17:23,759 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:17:23,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:17:23,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:17:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:17:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:17:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:17:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:17:23,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:17:23,763 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:17:23,887 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:17:23,889 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:17:24,030 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:17:24,033 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:17:24,139 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:17:24,140 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 09:17:24,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:24 BoogieIcfgContainer [2024-11-19 09:17:24,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:17:24,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:17:24,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:17:24,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:17:24,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:17:22" (1/3) ... [2024-11-19 09:17:24,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5ccb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:24, skipping insertion in model container [2024-11-19 09:17:24,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:23" (2/3) ... [2024-11-19 09:17:24,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5ccb4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:24, skipping insertion in model container [2024-11-19 09:17:24,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:24" (3/3) ... [2024-11-19 09:17:24,149 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-11-19 09:17:24,164 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:17:24,164 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:17:24,165 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:17:24,207 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:17:24,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2024-11-19 09:17:24,271 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-11-19 09:17:24,271 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:24,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 5/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-11-19 09:17:24,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2024-11-19 09:17:24,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2024-11-19 09:17:24,292 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:17:24,302 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;@35122e13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:17:24,302 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-19 09:17:24,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:17:24,314 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-11-19 09:17:24,314 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:24,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:24,315 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:24,315 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:24,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:24,321 INFO L85 PathProgramCache]: Analyzing trace with hash -976161480, now seen corresponding path program 1 times [2024-11-19 09:17:24,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:24,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030819082] [2024-11-19 09:17:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:24,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:24,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030819082] [2024-11-19 09:17:24,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030819082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:24,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601690034] [2024-11-19 09:17:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:24,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:17:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:24,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:17:24,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:17:24,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-19 09:17:24,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:24,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:24,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-19 09:17:24,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:24,980 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2024-11-19 09:17:24,981 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:24,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 56 events. 10/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 2/49 useless extension candidates. Maximal degree in co-relation 79. Up to 23 conditions per place. [2024-11-19 09:17:24,983 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 18 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-19 09:17:24,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 124 flow [2024-11-19 09:17:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-19 09:17:24,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-11-19 09:17:24,998 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 90 transitions. [2024-11-19 09:17:24,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 124 flow [2024-11-19 09:17:25,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:17:25,004 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2024-11-19 09:17:25,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-19 09:17:25,010 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-19 09:17:25,010 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2024-11-19 09:17:25,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:25,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:25,011 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:25,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:17:25,014 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:25,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -196234554, now seen corresponding path program 1 times [2024-11-19 09:17:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133231002] [2024-11-19 09:17:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133231002] [2024-11-19 09:17:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133231002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:25,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:25,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:25,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990143480] [2024-11-19 09:17:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:25,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:17:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:17:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:17:25,284 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:17:25,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-19 09:17:25,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:25,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:17:25,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:25,389 INFO L124 PetriNetUnfolderBase]: 15/72 cut-off events. [2024-11-19 09:17:25,390 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:17:25,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 72 events. 15/72 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 7 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 48. Up to 39 conditions per place. [2024-11-19 09:17:25,391 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-19 09:17:25,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 138 flow [2024-11-19 09:17:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-19 09:17:25,393 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-11-19 09:17:25,393 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 95 transitions. [2024-11-19 09:17:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 138 flow [2024-11-19 09:17:25,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:25,395 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2024-11-19 09:17:25,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-19 09:17:25,396 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-11-19 09:17:25,397 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2024-11-19 09:17:25,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-19 09:17:25,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:25,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:25,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:17:25,398 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:25,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1788303622, now seen corresponding path program 1 times [2024-11-19 09:17:25,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:25,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909403517] [2024-11-19 09:17:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:25,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:25,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:25,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909403517] [2024-11-19 09:17:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909403517] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:25,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:25,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172168380] [2024-11-19 09:17:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:25,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:25,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:25,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-19 09:17:25,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:25,586 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2024-11-19 09:17:25,586 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-19 09:17:25,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 73 events. 14/73 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 1 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2024-11-19 09:17:25,587 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-19 09:17:25,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-11-19 09:17:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-19 09:17:25,593 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-11-19 09:17:25,593 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2024-11-19 09:17:25,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-11-19 09:17:25,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:17:25,594 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-11-19 09:17:25,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-19 09:17:25,597 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-19 09:17:25,597 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-11-19 09:17:25,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-19 09:17:25,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:25,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:25,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:17:25,599 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:25,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1954874215, now seen corresponding path program 1 times [2024-11-19 09:17:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733158651] [2024-11-19 09:17:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:25,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733158651] [2024-11-19 09:17:25,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733158651] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:25,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:25,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:25,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364219177] [2024-11-19 09:17:25,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:25,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:17:25,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:17:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:17:25,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:25,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-11-19 09:17:25,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:25,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:25,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:25,678 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2024-11-19 09:17:25,679 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-19 09:17:25,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 11/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 54. Up to 33 conditions per place. [2024-11-19 09:17:25,679 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2024-11-19 09:17:25,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2024-11-19 09:17:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:17:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:17:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-19 09:17:25,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-11-19 09:17:25,684 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2024-11-19 09:17:25,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2024-11-19 09:17:25,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:25,685 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2024-11-19 09:17:25,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-19 09:17:25,686 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2024-11-19 09:17:25,686 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2024-11-19 09:17:25,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-11-19 09:17:25,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:25,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:25,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:17:25,689 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:25,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1953818464, now seen corresponding path program 1 times [2024-11-19 09:17:25,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91851761] [2024-11-19 09:17:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:25,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:25,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:25,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91851761] [2024-11-19 09:17:25,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91851761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:25,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:25,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:25,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137738597] [2024-11-19 09:17:25,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:25,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:25,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:25,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:25,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:25,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:25,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:25,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:25,947 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2024-11-19 09:17:25,948 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:17:25,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 61 events. 12/61 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 5 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2024-11-19 09:17:25,950 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-19 09:17:25,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2024-11-19 09:17:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-19 09:17:25,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-11-19 09:17:25,954 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2024-11-19 09:17:25,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2024-11-19 09:17:25,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:17:25,957 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2024-11-19 09:17:25,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-19 09:17:25,958 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-11-19 09:17:25,958 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2024-11-19 09:17:25,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:25,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:25,961 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:25,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:17:25,961 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:25,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 696805413, now seen corresponding path program 1 times [2024-11-19 09:17:25,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:25,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968650573] [2024-11-19 09:17:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:25,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968650573] [2024-11-19 09:17:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968650573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522771850] [2024-11-19 09:17:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:26,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:26,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:26,154 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) [2024-11-19 09:17:26,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:17:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:26,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:17:26,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:26,368 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:17:26,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-19 09:17:26,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:17:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:26,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:26,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522771850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:26,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:26,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2024-11-19 09:17:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506405838] [2024-11-19 09:17:26,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:26,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:17:26,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:26,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:17:26,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:17:27,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-11-19 09:17:27,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 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) [2024-11-19 09:17:27,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:27,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-11-19 09:17:27,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:27,223 INFO L124 PetriNetUnfolderBase]: 30/120 cut-off events. [2024-11-19 09:17:27,223 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-19 09:17:27,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 120 events. 30/120 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 6 based on Foata normal form. 12/132 useless extension candidates. Maximal degree in co-relation 232. Up to 35 conditions per place. [2024-11-19 09:17:27,226 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2024-11-19 09:17:27,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 220 flow [2024-11-19 09:17:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:17:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:17:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-11-19 09:17:27,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5049833887043189 [2024-11-19 09:17:27,229 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 7 states and 152 transitions. [2024-11-19 09:17:27,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 220 flow [2024-11-19 09:17:27,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:27,231 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 150 flow [2024-11-19 09:17:27,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-11-19 09:17:27,234 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-19 09:17:27,235 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 150 flow [2024-11-19 09:17:27,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 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) [2024-11-19 09:17:27,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:27,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:27,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:17:27,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-19 09:17:27,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:27,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1762716273, now seen corresponding path program 1 times [2024-11-19 09:17:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:27,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844712671] [2024-11-19 09:17:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:27,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:27,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844712671] [2024-11-19 09:17:27,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844712671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:27,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931752229] [2024-11-19 09:17:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:27,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:27,583 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) [2024-11-19 09:17:27,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:17:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:27,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 09:17:27,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:27,671 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 [2024-11-19 09:17:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:27,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931752229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:27,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-19 09:17:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046878996] [2024-11-19 09:17:27,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:27,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:17:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:17:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:17:28,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:28,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 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) [2024-11-19 09:17:28,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:28,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:28,180 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2024-11-19 09:17:28,181 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-11-19 09:17:28,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 111 events. 25/111 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2024-11-19 09:17:28,182 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-11-19 09:17:28,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 248 flow [2024-11-19 09:17:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:17:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:17:28,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-11-19 09:17:28,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2024-11-19 09:17:28,184 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 150 flow. Second operand 7 states and 166 transitions. [2024-11-19 09:17:28,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 248 flow [2024-11-19 09:17:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 232 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-19 09:17:28,188 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 184 flow [2024-11-19 09:17:28,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-11-19 09:17:28,189 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-11-19 09:17:28,189 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 184 flow [2024-11-19 09:17:28,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 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) [2024-11-19 09:17:28,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:28,190 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] [2024-11-19 09:17:28,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:17:28,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 09:17:28,395 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:28,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:28,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1316447649, now seen corresponding path program 1 times [2024-11-19 09:17:28,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:28,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431282346] [2024-11-19 09:17:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:28,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:28,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431282346] [2024-11-19 09:17:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431282346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:28,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-19 09:17:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119985099] [2024-11-19 09:17:28,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:28,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:17:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:17:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:17:28,687 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:28,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 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) [2024-11-19 09:17:28,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:28,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:28,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:28,834 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2024-11-19 09:17:28,834 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-19 09:17:28,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 123 events. 24/123 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 12 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 299. Up to 51 conditions per place. [2024-11-19 09:17:28,837 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 28 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-11-19 09:17:28,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 283 flow [2024-11-19 09:17:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:17:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:17:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-11-19 09:17:28,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-11-19 09:17:28,838 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 184 flow. Second operand 10 states and 214 transitions. [2024-11-19 09:17:28,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 283 flow [2024-11-19 09:17:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 269 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:17:28,842 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 218 flow [2024-11-19 09:17:28,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=218, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2024-11-19 09:17:28,843 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-11-19 09:17:28,843 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 218 flow [2024-11-19 09:17:28,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 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) [2024-11-19 09:17:28,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:28,845 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] [2024-11-19 09:17:28,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:17:28,846 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:28,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -815916709, now seen corresponding path program 1 times [2024-11-19 09:17:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606915811] [2024-11-19 09:17:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:29,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:29,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606915811] [2024-11-19 09:17:29,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606915811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:29,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:17:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479417480] [2024-11-19 09:17:29,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:29,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:17:29,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:29,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:17:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:17:29,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:29,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2024-11-19 09:17:29,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:29,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:29,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:29,304 INFO L124 PetriNetUnfolderBase]: 20/115 cut-off events. [2024-11-19 09:17:29,304 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-11-19 09:17:29,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 115 events. 20/115 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 9 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 308. Up to 42 conditions per place. [2024-11-19 09:17:29,306 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 21 selfloop transitions, 7 changer transitions 5/47 dead transitions. [2024-11-19 09:17:29,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 293 flow [2024-11-19 09:17:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:17:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:17:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-19 09:17:29,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-11-19 09:17:29,308 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 218 flow. Second operand 9 states and 201 transitions. [2024-11-19 09:17:29,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 293 flow [2024-11-19 09:17:29,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 47 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:29,310 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 203 flow [2024-11-19 09:17:29,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=39} [2024-11-19 09:17:29,311 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-11-19 09:17:29,311 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 203 flow [2024-11-19 09:17:29,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 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) [2024-11-19 09:17:29,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:29,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:29,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:17:29,313 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:29,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -2043120856, now seen corresponding path program 1 times [2024-11-19 09:17:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:29,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936345183] [2024-11-19 09:17:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:29,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936345183] [2024-11-19 09:17:29,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936345183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:29,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538618298] [2024-11-19 09:17:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:29,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:29,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:29,491 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) [2024-11-19 09:17:29,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:17:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:29,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:17:29,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:29,698 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 [2024-11-19 09:17:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:29,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:29,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538618298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:29,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:29,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-19 09:17:29,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643813428] [2024-11-19 09:17:29,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:29,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:17:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:17:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:17:29,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:29,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 39 transitions, 203 flow. Second operand has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 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) [2024-11-19 09:17:29,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:29,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:30,117 INFO L124 PetriNetUnfolderBase]: 19/107 cut-off events. [2024-11-19 09:17:30,118 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-11-19 09:17:30,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 107 events. 19/107 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 178 event pairs, 9 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 286. Up to 40 conditions per place. [2024-11-19 09:17:30,121 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 6 changer transitions 1/43 dead transitions. [2024-11-19 09:17:30,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 266 flow [2024-11-19 09:17:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:17:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:17:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-11-19 09:17:30,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5614617940199336 [2024-11-19 09:17:30,123 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 203 flow. Second operand 7 states and 169 transitions. [2024-11-19 09:17:30,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 266 flow [2024-11-19 09:17:30,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 248 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-19 09:17:30,126 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 195 flow [2024-11-19 09:17:30,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2024-11-19 09:17:30,127 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-11-19 09:17:30,127 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 195 flow [2024-11-19 09:17:30,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 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) [2024-11-19 09:17:30,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:30,128 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:30,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:30,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:30,332 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:30,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash -17712933, now seen corresponding path program 2 times [2024-11-19 09:17:30,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:30,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166507195] [2024-11-19 09:17:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:30,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:17:30,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:30,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166507195] [2024-11-19 09:17:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166507195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414382113] [2024-11-19 09:17:30,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:30,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:30,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:30,579 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) [2024-11-19 09:17:30,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:17:30,670 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:17:30,671 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:30,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 09:17:30,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:30,851 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 [2024-11-19 09:17:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:30,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:30,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414382113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:30,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:30,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-19 09:17:30,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194383898] [2024-11-19 09:17:30,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:30,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:17:30,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:30,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:17:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:17:31,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:31,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 195 flow. Second operand has 17 states, 17 states have (on average 22.941176470588236) internal successors, (390), 17 states have internal predecessors, (390), 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) [2024-11-19 09:17:31,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:31,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:31,503 INFO L124 PetriNetUnfolderBase]: 15/101 cut-off events. [2024-11-19 09:17:31,504 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-19 09:17:31,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 101 events. 15/101 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 6 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 257. Up to 31 conditions per place. [2024-11-19 09:17:31,504 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-19 09:17:31,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 262 flow [2024-11-19 09:17:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:17:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:17:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-19 09:17:31,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2024-11-19 09:17:31,507 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 195 flow. Second operand 8 states and 191 transitions. [2024-11-19 09:17:31,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 262 flow [2024-11-19 09:17:31,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 43 transitions, 250 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-19 09:17:31,510 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 202 flow [2024-11-19 09:17:31,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2024-11-19 09:17:31,511 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-11-19 09:17:31,512 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 202 flow [2024-11-19 09:17:31,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.941176470588236) internal successors, (390), 17 states have internal predecessors, (390), 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) [2024-11-19 09:17:31,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:31,513 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:31,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:31,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:31,718 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:31,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1167425722, now seen corresponding path program 2 times [2024-11-19 09:17:31,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:31,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389937389] [2024-11-19 09:17:31,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:31,745 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:17:31,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389937389] [2024-11-19 09:17:31,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389937389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:31,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802475685] [2024-11-19 09:17:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:31,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:31,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:31,970 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) [2024-11-19 09:17:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:17:32,045 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:17:32,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:32,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-19 09:17:32,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:32,077 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:17:32,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-19 09:17:32,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:17:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:32,368 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802475685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:32,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:32,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-19 09:17:32,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826882565] [2024-11-19 09:17:32,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:32,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:17:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:17:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:17:33,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-11-19 09:17:33,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 202 flow. Second operand has 23 states, 23 states have (on average 18.391304347826086) internal successors, (423), 23 states have internal predecessors, (423), 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) [2024-11-19 09:17:33,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:33,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-11-19 09:17:33,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:33,562 INFO L124 PetriNetUnfolderBase]: 48/190 cut-off events. [2024-11-19 09:17:33,563 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2024-11-19 09:17:33,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 190 events. 48/190 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 287 event pairs, 6 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 589. Up to 38 conditions per place. [2024-11-19 09:17:33,564 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-11-19 09:17:33,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 486 flow [2024-11-19 09:17:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:17:33,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:17:33,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-11-19 09:17:33,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-11-19 09:17:33,566 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 202 flow. Second operand 11 states and 231 transitions. [2024-11-19 09:17:33,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 486 flow [2024-11-19 09:17:33,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-19 09:17:33,570 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 327 flow [2024-11-19 09:17:33,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2024-11-19 09:17:33,570 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-11-19 09:17:33,571 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 327 flow [2024-11-19 09:17:33,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.391304347826086) internal successors, (423), 23 states have internal predecessors, (423), 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) [2024-11-19 09:17:33,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:33,571 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:33,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:17:33,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:17:33,776 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:33,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash 909662780, now seen corresponding path program 2 times [2024-11-19 09:17:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:33,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390609416] [2024-11-19 09:17:33,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:33,787 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:17:33,787 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 09:17:33,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390609416] [2024-11-19 09:17:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390609416] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672867075] [2024-11-19 09:17:33,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:33,904 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) [2024-11-19 09:17:33,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:17:33,976 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:17:33,976 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:33,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:17:33,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:34,005 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:17:34,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-19 09:17:34,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:17:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 09:17:34,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 09:17:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672867075] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:34,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:34,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-19 09:17:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791561363] [2024-11-19 09:17:34,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:34,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:17:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:17:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:17:35,073 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-11-19 09:17:35,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 327 flow. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:35,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:35,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-11-19 09:17:35,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:35,261 INFO L124 PetriNetUnfolderBase]: 55/189 cut-off events. [2024-11-19 09:17:35,261 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2024-11-19 09:17:35,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 189 events. 55/189 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 263 event pairs, 2 based on Foata normal form. 8/197 useless extension candidates. Maximal degree in co-relation 629. Up to 80 conditions per place. [2024-11-19 09:17:35,265 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 19 changer transitions 0/51 dead transitions. [2024-11-19 09:17:35,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 415 flow [2024-11-19 09:17:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:17:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:17:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-11-19 09:17:35,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-11-19 09:17:35,267 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 327 flow. Second operand 6 states and 116 transitions. [2024-11-19 09:17:35,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 415 flow [2024-11-19 09:17:35,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 390 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:17:35,271 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 347 flow [2024-11-19 09:17:35,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2024-11-19 09:17:35,271 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-11-19 09:17:35,271 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 347 flow [2024-11-19 09:17:35,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:35,272 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:35,272 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:35,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:17:35,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:35,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:35,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -866977162, now seen corresponding path program 3 times [2024-11-19 09:17:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:35,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893869139] [2024-11-19 09:17:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:17:35,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:35,507 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 09:17:35,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:36,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893869139] [2024-11-19 09:17:36,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893869139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:36,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162787086] [2024-11-19 09:17:36,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:17:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:36,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:36,011 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) [2024-11-19 09:17:36,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:17:36,106 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-19 09:17:36,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:36,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:17:36,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:36,347 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 [2024-11-19 09:17:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:36,360 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:36,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162787086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:36,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:36,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-19 09:17:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336765144] [2024-11-19 09:17:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:36,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:17:36,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:17:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:17:36,843 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:36,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 347 flow. Second operand has 21 states, 21 states have (on average 22.142857142857142) internal successors, (465), 21 states have internal predecessors, (465), 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) [2024-11-19 09:17:36,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:36,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:36,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:37,207 INFO L124 PetriNetUnfolderBase]: 40/172 cut-off events. [2024-11-19 09:17:37,207 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2024-11-19 09:17:37,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 172 events. 40/172 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 240 event pairs, 18 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 585. Up to 73 conditions per place. [2024-11-19 09:17:37,210 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 38 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-11-19 09:17:37,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 57 transitions, 474 flow [2024-11-19 09:17:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:17:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:17:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-11-19 09:17:37,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5372093023255814 [2024-11-19 09:17:37,213 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 347 flow. Second operand 10 states and 231 transitions. [2024-11-19 09:17:37,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 57 transitions, 474 flow [2024-11-19 09:17:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 57 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:17:37,218 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 343 flow [2024-11-19 09:17:37,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2024-11-19 09:17:37,219 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-11-19 09:17:37,219 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 343 flow [2024-11-19 09:17:37,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.142857142857142) internal successors, (465), 21 states have internal predecessors, (465), 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) [2024-11-19 09:17:37,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:37,220 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:37,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:17:37,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:37,421 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:37,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1357974953, now seen corresponding path program 4 times [2024-11-19 09:17:37,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:37,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714688792] [2024-11-19 09:17:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:17:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:37,460 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:17:37,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:37,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714688792] [2024-11-19 09:17:37,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714688792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:37,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484623497] [2024-11-19 09:17:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:17:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:37,715 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) [2024-11-19 09:17:37,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:17:37,809 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:17:37,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:37,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:17:37,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:38,088 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 [2024-11-19 09:17:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:38,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484623497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:38,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-19 09:17:38,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237315158] [2024-11-19 09:17:38,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:38,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:17:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:17:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:17:38,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:38,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 343 flow. Second operand has 23 states, 23 states have (on average 22.695652173913043) internal successors, (522), 23 states have internal predecessors, (522), 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) [2024-11-19 09:17:38,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:38,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:38,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:38,876 INFO L124 PetriNetUnfolderBase]: 29/159 cut-off events. [2024-11-19 09:17:38,876 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2024-11-19 09:17:38,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 159 events. 29/159 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 221 event pairs, 12 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 531. Up to 51 conditions per place. [2024-11-19 09:17:38,878 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2024-11-19 09:17:38,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 54 transitions, 435 flow [2024-11-19 09:17:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:17:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:17:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-11-19 09:17:38,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2024-11-19 09:17:38,880 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 343 flow. Second operand 10 states and 237 transitions. [2024-11-19 09:17:38,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 54 transitions, 435 flow [2024-11-19 09:17:38,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 54 transitions, 413 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-19 09:17:38,885 INFO L231 Difference]: Finished difference. Result has 81 places, 47 transitions, 345 flow [2024-11-19 09:17:38,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=81, PETRI_TRANSITIONS=47} [2024-11-19 09:17:38,886 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-11-19 09:17:38,886 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 47 transitions, 345 flow [2024-11-19 09:17:38,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.695652173913043) internal successors, (522), 23 states have internal predecessors, (522), 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) [2024-11-19 09:17:38,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:38,887 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:38,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:17:39,087 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 [2024-11-19 09:17:39,088 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:39,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1089227216, now seen corresponding path program 5 times [2024-11-19 09:17:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816316572] [2024-11-19 09:17:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:17:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:39,113 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 09:17:39,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:39,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816316572] [2024-11-19 09:17:39,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816316572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:39,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697002152] [2024-11-19 09:17:39,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:17:39,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:39,413 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) [2024-11-19 09:17:39,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:17:39,497 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 09:17:39,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:39,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:17:39,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:39,792 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 [2024-11-19 09:17:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:39,803 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697002152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-19 09:17:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891276721] [2024-11-19 09:17:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:39,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:17:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:17:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:17:40,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:40,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 47 transitions, 345 flow. Second operand has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 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) [2024-11-19 09:17:40,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:40,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:40,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:40,881 INFO L124 PetriNetUnfolderBase]: 26/154 cut-off events. [2024-11-19 09:17:40,882 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2024-11-19 09:17:40,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 154 events. 26/154 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 9 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 511. Up to 40 conditions per place. [2024-11-19 09:17:40,883 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2024-11-19 09:17:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 55 transitions, 443 flow [2024-11-19 09:17:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:17:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:17:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-11-19 09:17:40,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5496828752642706 [2024-11-19 09:17:40,885 INFO L175 Difference]: Start difference. First operand has 81 places, 47 transitions, 345 flow. Second operand 11 states and 260 transitions. [2024-11-19 09:17:40,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 55 transitions, 443 flow [2024-11-19 09:17:40,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 55 transitions, 419 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-19 09:17:40,890 INFO L231 Difference]: Finished difference. Result has 85 places, 47 transitions, 349 flow [2024-11-19 09:17:40,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=349, PETRI_PLACES=85, PETRI_TRANSITIONS=47} [2024-11-19 09:17:40,891 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-11-19 09:17:40,891 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 47 transitions, 349 flow [2024-11-19 09:17:40,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 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) [2024-11-19 09:17:40,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:40,893 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:40,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:41,093 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 [2024-11-19 09:17:41,094 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:41,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:41,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2013160073, now seen corresponding path program 6 times [2024-11-19 09:17:41,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:41,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629397951] [2024-11-19 09:17:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:17:41,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:41,134 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-19 09:17:41,134 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:41,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629397951] [2024-11-19 09:17:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629397951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002284160] [2024-11-19 09:17:41,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:17:41,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:41,538 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) [2024-11-19 09:17:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:17:41,645 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-19 09:17:41,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:41,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:17:41,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:42,021 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 [2024-11-19 09:17:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:42,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002284160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:42,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:42,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-19 09:17:42,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497054559] [2024-11-19 09:17:42,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:42,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 09:17:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:42,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 09:17:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:17:42,904 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:42,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 47 transitions, 349 flow. Second operand has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 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) [2024-11-19 09:17:42,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:42,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:42,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:43,303 INFO L124 PetriNetUnfolderBase]: 23/155 cut-off events. [2024-11-19 09:17:43,304 INFO L125 PetriNetUnfolderBase]: For 651/651 co-relation queries the response was YES. [2024-11-19 09:17:43,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 155 events. 23/155 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 6 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 509. Up to 31 conditions per place. [2024-11-19 09:17:43,306 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-11-19 09:17:43,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 56 transitions, 453 flow [2024-11-19 09:17:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:17:43,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:17:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-11-19 09:17:43,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5484496124031008 [2024-11-19 09:17:43,307 INFO L175 Difference]: Start difference. First operand has 85 places, 47 transitions, 349 flow. Second operand 12 states and 283 transitions. [2024-11-19 09:17:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 56 transitions, 453 flow [2024-11-19 09:17:43,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 56 transitions, 425 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-11-19 09:17:43,312 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 353 flow [2024-11-19 09:17:43,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=89, PETRI_TRANSITIONS=47} [2024-11-19 09:17:43,312 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-11-19 09:17:43,313 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 353 flow [2024-11-19 09:17:43,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 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) [2024-11-19 09:17:43,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:43,313 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:43,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:43,517 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 [2024-11-19 09:17:43,518 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:43,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -828021418, now seen corresponding path program 3 times [2024-11-19 09:17:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707887325] [2024-11-19 09:17:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:17:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:43,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:17:43,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 09:17:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:17:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707887325] [2024-11-19 09:17:43,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707887325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:17:43,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413908161] [2024-11-19 09:17:43,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:17:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:17:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:43,729 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) [2024-11-19 09:17:43,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:17:43,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:17:43,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:43,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-19 09:17:43,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:43,832 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:17:43,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-19 09:17:43,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:17:44,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:17:44,204 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 15 treesize of output 15 [2024-11-19 09:17:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 09:17:44,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 09:17:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413908161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:44,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:17:44,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-19 09:17:44,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718342011] [2024-11-19 09:17:44,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:44,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:17:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:17:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:17:44,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:17:44,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-11-19 09:17:44,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 47 transitions, 353 flow. Second operand has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 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) [2024-11-19 09:17:44,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:44,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-11-19 09:17:44,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:45,074 INFO L124 PetriNetUnfolderBase]: 41/171 cut-off events. [2024-11-19 09:17:45,074 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2024-11-19 09:17:45,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 171 events. 41/171 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 194 event pairs, 3 based on Foata normal form. 2/173 useless extension candidates. Maximal degree in co-relation 565. Up to 72 conditions per place. [2024-11-19 09:17:45,075 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 23 selfloop transitions, 19 changer transitions 0/50 dead transitions. [2024-11-19 09:17:45,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 50 transitions, 427 flow [2024-11-19 09:17:45,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:17:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:17:45,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-19 09:17:45,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-11-19 09:17:45,077 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 353 flow. Second operand 6 states and 112 transitions. [2024-11-19 09:17:45,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 50 transitions, 427 flow [2024-11-19 09:17:45,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 50 transitions, 370 flow, removed 6 selfloop flow, removed 18 redundant places. [2024-11-19 09:17:45,081 INFO L231 Difference]: Finished difference. Result has 75 places, 46 transitions, 316 flow [2024-11-19 09:17:45,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=75, PETRI_TRANSITIONS=46} [2024-11-19 09:17:45,081 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-11-19 09:17:45,081 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 46 transitions, 316 flow [2024-11-19 09:17:45,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.526315789473685) internal successors, (314), 19 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) [2024-11-19 09:17:45,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:45,082 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:45,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:17:45,286 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 [2024-11-19 09:17:45,287 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:45,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1463024146, now seen corresponding path program 7 times [2024-11-19 09:17:45,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:17:45,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582393550] [2024-11-19 09:17:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 09:17:45,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:17:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:17:45,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:17:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:17:45,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:17:45,362 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:17:45,363 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2024-11-19 09:17:45,365 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2024-11-19 09:17:45,366 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2024-11-19 09:17:45,368 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2024-11-19 09:17:45,368 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2024-11-19 09:17:45,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:17:45,369 INFO L407 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:45,428 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-19 09:17:45,428 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-19 09:17:45,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:17:45 BasicIcfg [2024-11-19 09:17:45,432 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-19 09:17:45,433 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-19 09:17:45,433 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-19 09:17:45,433 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-19 09:17:45,434 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:24" (3/4) ... [2024-11-19 09:17:45,437 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-19 09:17:45,439 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-19 09:17:45,439 INFO L158 Benchmark]: Toolchain (without parser) took 22532.29ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 97.7MB in the beginning and 116.0MB in the end (delta: -18.3MB). Peak memory consumption was 162.8MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,439 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 167.8MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 09:17:45,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 664.11ms. Allocated memory is still 167.8MB. Free memory was 97.4MB in the beginning and 124.1MB in the end (delta: -26.7MB). Peak memory consumption was 33.3MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,440 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.05ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 122.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,440 INFO L158 Benchmark]: Boogie Preprocessor took 37.41ms. Allocated memory is still 167.8MB. Free memory was 122.0MB in the beginning and 119.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,441 INFO L158 Benchmark]: RCFGBuilder took 468.64ms. Allocated memory is still 167.8MB. Free memory was 119.9MB in the beginning and 94.7MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,441 INFO L158 Benchmark]: TraceAbstraction took 21290.20ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 93.9MB in the beginning and 116.0MB in the end (delta: -22.1MB). Peak memory consumption was 158.9MB. Max. memory is 16.1GB. [2024-11-19 09:17:45,441 INFO L158 Benchmark]: Witness Printer took 5.61ms. Allocated memory is still 346.0MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 09:17:45,442 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 167.8MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 664.11ms. Allocated memory is still 167.8MB. Free memory was 97.4MB in the beginning and 124.1MB in the end (delta: -26.7MB). Peak memory consumption was 33.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.05ms. Allocated memory is still 167.8MB. Free memory was 124.1MB in the beginning and 122.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.41ms. Allocated memory is still 167.8MB. Free memory was 122.0MB in the beginning and 119.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 468.64ms. Allocated memory is still 167.8MB. Free memory was 119.9MB in the beginning and 94.7MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 21290.20ms. Allocated memory was 167.8MB in the beginning and 346.0MB in the end (delta: 178.3MB). Free memory was 93.9MB in the beginning and 116.0MB in the end (delta: -22.1MB). Peak memory consumption was 158.9MB. Max. memory is 16.1GB. * Witness Printer took 5.61ms. Allocated memory is still 346.0MB. Free memory is still 116.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 1119]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 1119. Possible FailurePath: [L1108] 0 char *v; [L1121] 0 pthread_t t1, t2; [L1122] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\old(arg)={0:0}, t1=-1, v={0:0}] [L1111] 1 v = malloc(sizeof(char) * 8) [L1112] 1 return 0; [L1123] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={-1:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1116] COND TRUE 2 \read(*v) [L1116] FCALL 2 strcpy(v, "Bigshot") [L1117] 2 return 0; [L1125] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] [L1126] EXPR 0 v[0] [L1126] CALL 0 __VERIFIER_assert(v[0] == 'B') [L1107] COND FALSE 0 !(!expression) VAL [\old(arg)={0:0}, \old(expression)=1, \result={0:0}, arg={0:0}, expression=1, v={-1:0}] [L1126] RET 0 __VERIFIER_assert(v[0] == 'B') [L1127] 0 return 0; VAL [\old(arg)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 20]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1122]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1124]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.1s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 8.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2743 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2436 mSDsluCounter, 1795 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1739 mSDsCounter, 69 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12603 IncrementalHoareTripleChecker+Invalid, 12672 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 69 mSolverCounterUnsat, 56 mSDtfsCounter, 12603 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1018 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=353occurred in iteration=17, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 1032 NumberOfCodeBlocks, 900 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1358 ConstructedInterpolants, 12 QuantifiedInterpolants, 18230 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2161 ConjunctsInSsa, 198 ConjunctsInUnsatCore, 40 InterpolantComputations, 7 PerfectInterpolantSequences, 573/1866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-19 09:17:45,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:17:47,720 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:17:47,809 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-19 09:17:47,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:17:47,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:17:47,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:17:47,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:17:47,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:17:47,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:17:47,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:17:47,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:17:47,851 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:17:47,854 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:17:47,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:17:47,854 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:17:47,855 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:17:47,855 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:17:47,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:17:47,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:17:47,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:17:47,856 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:17:47,857 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:17:47,857 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:17:47,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:17:47,858 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:17:47,858 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-19 09:17:47,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:17:47,859 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-19 09:17:47,859 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:17:47,860 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:17:47,860 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:17:47,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:17:47,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:17:47,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:17:47,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:17:47,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:17:47,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:17:47,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:17:47,871 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-19 09:17:47,872 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-19 09:17:47,872 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:17:47,872 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:17:47,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:17:47,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:17:47,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2024-11-19 09:17:48,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:17:48,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:17:48,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:17:48,208 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:17:48,209 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:17:48,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-19 09:17:49,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:17:50,088 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:17:50,089 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2024-11-19 09:17:50,111 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b565633f2/6cab384e221740cda5eb1e00aa575e66/FLAGd2a8ab95b [2024-11-19 09:17:50,128 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b565633f2/6cab384e221740cda5eb1e00aa575e66 [2024-11-19 09:17:50,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:17:50,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:17:50,134 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:17:50,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:17:50,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:17:50,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78d1b831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50, skipping insertion in model container [2024-11-19 09:17:50,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,190 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:17:50,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:17:50,666 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:17:50,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:17:50,802 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:17:50,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50 WrapperNode [2024-11-19 09:17:50,803 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:17:50,804 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:17:50,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:17:50,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:17:50,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,834 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,863 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2024-11-19 09:17:50,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:17:50,864 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:17:50,864 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:17:50,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:17:50,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,883 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,911 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-19 09:17:50,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,915 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,938 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:17:50,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:17:50,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:17:50,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:17:50,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (1/1) ... [2024-11-19 09:17:50,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:17:50,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:17:51,000 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) [2024-11-19 09:17:51,004 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 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-19 09:17:51,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:17:51,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:17:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:17:51,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:17:51,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2024-11-19 09:17:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2024-11-19 09:17:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2024-11-19 09:17:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:17:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:17:51,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:17:51,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:17:51,060 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:17:51,212 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:17:51,215 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:17:51,469 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:17:51,471 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:17:51,605 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:17:51,607 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-19 09:17:51,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:51 BoogieIcfgContainer [2024-11-19 09:17:51,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:17:51,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:17:51,610 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:17:51,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:17:51,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:17:50" (1/3) ... [2024-11-19 09:17:51,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dce6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:51, skipping insertion in model container [2024-11-19 09:17:51,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:17:50" (2/3) ... [2024-11-19 09:17:51,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9dce6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:17:51, skipping insertion in model container [2024-11-19 09:17:51,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:17:51" (3/3) ... [2024-11-19 09:17:51,618 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-11-19 09:17:51,634 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:17:51,635 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:17:51,635 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:17:51,697 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:17:51,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2024-11-19 09:17:51,759 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-11-19 09:17:51,760 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:51,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 5/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-11-19 09:17:51,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2024-11-19 09:17:51,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2024-11-19 09:17:51,776 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:17:51,782 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;@7a82a2d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:17:51,783 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-19 09:17:51,788 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:17:51,788 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-11-19 09:17:51,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:51,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:51,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:51,790 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:51,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1089432420, now seen corresponding path program 1 times [2024-11-19 09:17:51,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580640812] [2024-11-19 09:17:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:51,812 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:51,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:51,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-19 09:17:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:51,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:17:51,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:52,048 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-19 09:17:52,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-11-19 09:17:52,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:52,097 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:52,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:52,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580640812] [2024-11-19 09:17:52,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580640812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:52,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:17:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469668679] [2024-11-19 09:17:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:52,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:52,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:52,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:52,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:52,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:52,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:52,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:52,261 INFO L124 PetriNetUnfolderBase]: 8/54 cut-off events. [2024-11-19 09:17:52,262 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:17:52,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 54 events. 8/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 2 based on Foata normal form. 4/50 useless extension candidates. Maximal degree in co-relation 71. Up to 20 conditions per place. [2024-11-19 09:17:52,264 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 15 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-19 09:17:52,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 118 flow [2024-11-19 09:17:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-19 09:17:52,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2024-11-19 09:17:52,279 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 99 transitions. [2024-11-19 09:17:52,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 118 flow [2024-11-19 09:17:52,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:17:52,286 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2024-11-19 09:17:52,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-19 09:17:52,294 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-19 09:17:52,294 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2024-11-19 09:17:52,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:52,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:52,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:52,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-19 09:17:52,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:52,497 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:52,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -587333092, now seen corresponding path program 1 times [2024-11-19 09:17:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591698984] [2024-11-19 09:17:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:52,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:52,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:52,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:52,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-19 09:17:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:52,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:17:52,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:52,636 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:17:52,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 09:17:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:52,728 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:52,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:52,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591698984] [2024-11-19 09:17:52,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591698984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:52,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:52,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:17:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418771925] [2024-11-19 09:17:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:52,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:52,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:52,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:52,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:52,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:52,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:52,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:52,881 INFO L124 PetriNetUnfolderBase]: 14/71 cut-off events. [2024-11-19 09:17:52,881 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:17:52,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 71 events. 14/71 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 6 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 46. Up to 36 conditions per place. [2024-11-19 09:17:52,882 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-19 09:17:52,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 134 flow [2024-11-19 09:17:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-19 09:17:52,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-11-19 09:17:52,888 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 101 transitions. [2024-11-19 09:17:52,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 134 flow [2024-11-19 09:17:52,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:52,890 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2024-11-19 09:17:52,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-19 09:17:52,891 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-11-19 09:17:52,892 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2024-11-19 09:17:52,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:52,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:52,893 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:52,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:53,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,095 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:53,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1027456410, now seen corresponding path program 1 times [2024-11-19 09:17:53,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:53,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999924324] [2024-11-19 09:17:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:53,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:53,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-19 09:17:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:53,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 09:17:53,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:53,186 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 6 treesize of output 7 [2024-11-19 09:17:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:53,219 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:53,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999924324] [2024-11-19 09:17:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999924324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778678140] [2024-11-19 09:17:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:53,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:53,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:53,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-19 09:17:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:53,349 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2024-11-19 09:17:53,349 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-19 09:17:53,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 73 events. 14/73 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 160 event pairs, 1 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2024-11-19 09:17:53,350 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-19 09:17:53,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-11-19 09:17:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-19 09:17:53,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-11-19 09:17:53,352 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2024-11-19 09:17:53,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-11-19 09:17:53,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:17:53,354 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-11-19 09:17:53,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-19 09:17:53,355 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-19 09:17:53,355 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-11-19 09:17:53,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-11-19 09:17:53,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:53,357 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:53,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:53,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,558 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:53,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1787433129, now seen corresponding path program 1 times [2024-11-19 09:17:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:53,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375088548] [2024-11-19 09:17:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:53,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:53,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-19 09:17:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:53,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-19 09:17:53,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:53,635 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:53,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:53,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375088548] [2024-11-19 09:17:53,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375088548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:53,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:53,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:53,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344476310] [2024-11-19 09:17:53,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:53,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:17:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:53,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:17:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:17:53,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:53,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-11-19 09:17:53,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:53,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:53,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:53,692 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2024-11-19 09:17:53,692 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-19 09:17:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 11/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 132 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 54. Up to 33 conditions per place. [2024-11-19 09:17:53,693 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2024-11-19 09:17:53,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2024-11-19 09:17:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:17:53,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:17:53,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-19 09:17:53,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-11-19 09:17:53,695 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2024-11-19 09:17:53,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2024-11-19 09:17:53,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:53,697 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2024-11-19 09:17:53,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-19 09:17:53,698 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2024-11-19 09:17:53,698 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2024-11-19 09:17:53,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-11-19 09:17:53,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:53,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:53,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-19 09:17:53,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,902 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:53,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1786377378, now seen corresponding path program 1 times [2024-11-19 09:17:53,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333282774] [2024-11-19 09:17:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:53,903 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:53,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:53,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:53,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-19 09:17:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:53,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:17:53,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:53,975 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 6 treesize of output 5 [2024-11-19 09:17:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:54,086 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:54,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:54,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333282774] [2024-11-19 09:17:54,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333282774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:54,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:54,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:17:54,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660212924] [2024-11-19 09:17:54,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:54,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:17:54,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:17:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:17:54,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-11-19 09:17:54,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:54,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:54,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-11-19 09:17:54,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:54,235 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2024-11-19 09:17:54,235 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 09:17:54,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 61 events. 12/61 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 5 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2024-11-19 09:17:54,236 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-19 09:17:54,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2024-11-19 09:17:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:17:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:17:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-19 09:17:54,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-11-19 09:17:54,238 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2024-11-19 09:17:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2024-11-19 09:17:54,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:17:54,240 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2024-11-19 09:17:54,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-19 09:17:54,241 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-11-19 09:17:54,241 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2024-11-19 09:17:54,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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) [2024-11-19 09:17:54,241 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:54,241 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:54,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-19 09:17:54,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:54,443 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:54,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash 53525603, now seen corresponding path program 1 times [2024-11-19 09:17:54,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:54,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053813639] [2024-11-19 09:17:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:54,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:54,445 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:54,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-19 09:17:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:54,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:17:54,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:54,542 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:17:54,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 09:17:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:54,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:54,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053813639] [2024-11-19 09:17:54,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053813639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:54,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:17:54,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 7 [2024-11-19 09:17:54,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888432115] [2024-11-19 09:17:54,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:54,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:17:54,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:54,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:17:54,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:17:55,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:55,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:55,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:55,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:55,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:55,367 INFO L124 PetriNetUnfolderBase]: 25/114 cut-off events. [2024-11-19 09:17:55,367 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-19 09:17:55,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 114 events. 25/114 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 205 event pairs, 4 based on Foata normal form. 12/124 useless extension candidates. Maximal degree in co-relation 209. Up to 29 conditions per place. [2024-11-19 09:17:55,369 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 25 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2024-11-19 09:17:55,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 206 flow [2024-11-19 09:17:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:17:55,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:17:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-11-19 09:17:55,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5436046511627907 [2024-11-19 09:17:55,371 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 8 states and 187 transitions. [2024-11-19 09:17:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 206 flow [2024-11-19 09:17:55,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:55,372 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 152 flow [2024-11-19 09:17:55,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-11-19 09:17:55,374 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-11-19 09:17:55,375 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 152 flow [2024-11-19 09:17:55,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:17:55,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:55,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:55,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-19 09:17:55,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:55,577 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:55,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -101494811, now seen corresponding path program 1 times [2024-11-19 09:17:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911509087] [2024-11-19 09:17:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:55,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:55,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:55,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:55,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-19 09:17:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:55,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:17:55,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:55,651 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 6 treesize of output 5 [2024-11-19 09:17:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:55,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:55,880 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:55,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911509087] [2024-11-19 09:17:55,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911509087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:55,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:17:55,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-11-19 09:17:55,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526776868] [2024-11-19 09:17:55,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:55,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:17:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:55,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:17:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:17:56,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:17:56,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 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) [2024-11-19 09:17:56,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:56,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:17:56,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:56,295 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2024-11-19 09:17:56,295 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-11-19 09:17:56,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 111 events. 25/111 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 177 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2024-11-19 09:17:56,297 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-11-19 09:17:56,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 250 flow [2024-11-19 09:17:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:17:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:17:56,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-11-19 09:17:56,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2024-11-19 09:17:56,299 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 152 flow. Second operand 7 states and 166 transitions. [2024-11-19 09:17:56,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 250 flow [2024-11-19 09:17:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 232 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-19 09:17:56,302 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 184 flow [2024-11-19 09:17:56,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-11-19 09:17:56,302 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-11-19 09:17:56,303 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 184 flow [2024-11-19 09:17:56,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 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) [2024-11-19 09:17:56,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:56,303 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] [2024-11-19 09:17:56,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-11-19 09:17:56,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:56,504 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:56,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1462115297, now seen corresponding path program 1 times [2024-11-19 09:17:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:56,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726670283] [2024-11-19 09:17:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:56,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:56,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:56,508 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:56,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-19 09:17:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:56,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:17:56,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:56,666 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 17 treesize of output 9 [2024-11-19 09:17:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:56,676 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:17:56,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:56,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726670283] [2024-11-19 09:17:56,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726670283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:17:56,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:17:56,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:17:56,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332641471] [2024-11-19 09:17:56,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:17:56,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:17:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:56,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:17:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:17:56,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:56,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2024-11-19 09:17:56,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:56,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:56,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:56,809 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2024-11-19 09:17:56,809 INFO L125 PetriNetUnfolderBase]: For 145/145 co-relation queries the response was YES. [2024-11-19 09:17:56,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 109 events. 21/109 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 177 event pairs, 12 based on Foata normal form. 2/111 useless extension candidates. Maximal degree in co-relation 262. Up to 51 conditions per place. [2024-11-19 09:17:56,811 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-19 09:17:56,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 41 transitions, 240 flow [2024-11-19 09:17:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:17:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:17:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-19 09:17:56,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2024-11-19 09:17:56,813 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 184 flow. Second operand 6 states and 145 transitions. [2024-11-19 09:17:56,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 41 transitions, 240 flow [2024-11-19 09:17:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 227 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:17:56,819 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 181 flow [2024-11-19 09:17:56,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2024-11-19 09:17:56,820 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-11-19 09:17:56,821 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 181 flow [2024-11-19 09:17:56,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2024-11-19 09:17:56,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:56,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:56,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:17:57,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:57,023 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:57,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1402395310, now seen corresponding path program 1 times [2024-11-19 09:17:57,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:57,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7324610] [2024-11-19 09:17:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:17:57,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:57,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:57,026 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:57,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-19 09:17:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:17:57,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:17:57,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:57,273 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 17 treesize of output 9 [2024-11-19 09:17:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:57,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:57,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:57,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7324610] [2024-11-19 09:17:57,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7324610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:57,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:17:57,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-11-19 09:17:57,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904166827] [2024-11-19 09:17:57,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:57,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:17:57,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:17:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:17:57,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:17:57,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 181 flow. Second operand has 10 states, 10 states have (on average 23.1) internal successors, (231), 10 states have internal predecessors, (231), 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) [2024-11-19 09:17:57,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:17:57,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:17:57,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:17:57,749 INFO L124 PetriNetUnfolderBase]: 18/104 cut-off events. [2024-11-19 09:17:57,749 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-19 09:17:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 104 events. 18/104 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 7 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 252. Up to 34 conditions per place. [2024-11-19 09:17:57,751 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 21 selfloop transitions, 9 changer transitions 0/43 dead transitions. [2024-11-19 09:17:57,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 43 transitions, 246 flow [2024-11-19 09:17:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:17:57,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:17:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-11-19 09:17:57,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494186046511628 [2024-11-19 09:17:57,753 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 181 flow. Second operand 8 states and 189 transitions. [2024-11-19 09:17:57,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 43 transitions, 246 flow [2024-11-19 09:17:57,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 43 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:17:57,756 INFO L231 Difference]: Finished difference. Result has 60 places, 38 transitions, 195 flow [2024-11-19 09:17:57,757 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=195, PETRI_PLACES=60, PETRI_TRANSITIONS=38} [2024-11-19 09:17:57,757 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-11-19 09:17:57,757 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 38 transitions, 195 flow [2024-11-19 09:17:57,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.1) internal successors, (231), 10 states have internal predecessors, (231), 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) [2024-11-19 09:17:57,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:17:57,758 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:17:57,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-19 09:17:57,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:57,963 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:17:57,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:17:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1063418841, now seen corresponding path program 2 times [2024-11-19 09:17:57,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:17:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521919969] [2024-11-19 09:17:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:17:57,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:17:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:17:57,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:17:57,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-11-19 09:17:58,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:17:58,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:17:58,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 09:17:58,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:17:58,123 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 6 treesize of output 5 [2024-11-19 09:17:58,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-19 09:17:58,995 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 12 treesize of output 8 [2024-11-19 09:17:59,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-19 09:17:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:59,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:17:59,107 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 39 treesize of output 35 [2024-11-19 09:17:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:17:59,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:17:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521919969] [2024-11-19 09:17:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521919969] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:17:59,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:17:59,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2024-11-19 09:17:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029866020] [2024-11-19 09:17:59,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:17:59,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:17:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:17:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:17:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:18:00,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-11-19 09:18:00,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 38 transitions, 195 flow. Second operand has 18 states, 18 states have (on average 18.61111111111111) internal successors, (335), 18 states have internal predecessors, (335), 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) [2024-11-19 09:18:00,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:00,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-11-19 09:18:00,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:01,516 INFO L124 PetriNetUnfolderBase]: 25/124 cut-off events. [2024-11-19 09:18:01,516 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-19 09:18:01,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 124 events. 25/124 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 174 event pairs, 4 based on Foata normal form. 2/125 useless extension candidates. Maximal degree in co-relation 337. Up to 23 conditions per place. [2024-11-19 09:18:01,518 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 34 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2024-11-19 09:18:01,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 60 transitions, 365 flow [2024-11-19 09:18:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:18:01,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:18:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 325 transitions. [2024-11-19 09:18:01,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44459644322845415 [2024-11-19 09:18:01,520 INFO L175 Difference]: Start difference. First operand has 60 places, 38 transitions, 195 flow. Second operand 17 states and 325 transitions. [2024-11-19 09:18:01,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 60 transitions, 365 flow [2024-11-19 09:18:01,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 349 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-19 09:18:01,523 INFO L231 Difference]: Finished difference. Result has 77 places, 43 transitions, 267 flow [2024-11-19 09:18:01,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=267, PETRI_PLACES=77, PETRI_TRANSITIONS=43} [2024-11-19 09:18:01,524 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-11-19 09:18:01,524 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 43 transitions, 267 flow [2024-11-19 09:18:01,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.61111111111111) internal successors, (335), 18 states have internal predecessors, (335), 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) [2024-11-19 09:18:01,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:01,525 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:01,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-11-19 09:18:01,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:01,729 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:01,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:01,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2046409800, now seen corresponding path program 2 times [2024-11-19 09:18:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088889883] [2024-11-19 09:18:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:18:01,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:01,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:01,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-19 09:18:01,814 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:18:01,814 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:01,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:18:01,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:01,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:18:01,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:18:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:02,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:02,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:02,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1088889883] [2024-11-19 09:18:02,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1088889883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:02,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:02,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-11-19 09:18:02,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286897250] [2024-11-19 09:18:02,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:02,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 09:18:02,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 09:18:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:18:04,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:18:04,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-19 09:18:04,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 43 transitions, 267 flow. Second operand has 16 states, 16 states have (on average 16.25) internal successors, (260), 16 states have internal predecessors, (260), 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) [2024-11-19 09:18:04,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:04,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-19 09:18:04,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:05,076 INFO L124 PetriNetUnfolderBase]: 48/199 cut-off events. [2024-11-19 09:18:05,077 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2024-11-19 09:18:05,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 199 events. 48/199 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 339 event pairs, 8 based on Foata normal form. 8/207 useless extension candidates. Maximal degree in co-relation 672. Up to 44 conditions per place. [2024-11-19 09:18:05,078 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-11-19 09:18:05,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 75 transitions, 555 flow [2024-11-19 09:18:05,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:18:05,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:18:05,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-11-19 09:18:05,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-11-19 09:18:05,081 INFO L175 Difference]: Start difference. First operand has 77 places, 43 transitions, 267 flow. Second operand 11 states and 209 transitions. [2024-11-19 09:18:05,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 75 transitions, 555 flow [2024-11-19 09:18:05,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 75 transitions, 501 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-11-19 09:18:05,084 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 363 flow [2024-11-19 09:18:05,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=363, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2024-11-19 09:18:05,084 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-11-19 09:18:05,084 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 363 flow [2024-11-19 09:18:05,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.25) internal successors, (260), 16 states have internal predecessors, (260), 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) [2024-11-19 09:18:05,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:05,085 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:05,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-11-19 09:18:05,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:05,286 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:05,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash 495212026, now seen corresponding path program 2 times [2024-11-19 09:18:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423260502] [2024-11-19 09:18:05,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:18:05,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:05,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:05,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:05,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-19 09:18:05,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:18:05,347 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:05,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:18:05,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:05,370 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:18:05,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 09:18:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 09:18:05,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-19 09:18:06,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:06,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423260502] [2024-11-19 09:18:06,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423260502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:06,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:06,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-19 09:18:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564455837] [2024-11-19 09:18:06,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:06,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:18:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:18:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:18:06,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:18:06,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 363 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-11-19 09:18:06,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:06,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:18:06,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:06,631 INFO L124 PetriNetUnfolderBase]: 46/189 cut-off events. [2024-11-19 09:18:06,631 INFO L125 PetriNetUnfolderBase]: For 612/612 co-relation queries the response was YES. [2024-11-19 09:18:06,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 189 events. 46/189 cut-off events. For 612/612 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 4 based on Foata normal form. 8/197 useless extension candidates. Maximal degree in co-relation 637. Up to 77 conditions per place. [2024-11-19 09:18:06,635 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 19 changer transitions 0/53 dead transitions. [2024-11-19 09:18:06,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 53 transitions, 453 flow [2024-11-19 09:18:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:18:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:18:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-11-19 09:18:06,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-11-19 09:18:06,636 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 363 flow. Second operand 6 states and 126 transitions. [2024-11-19 09:18:06,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 53 transitions, 453 flow [2024-11-19 09:18:06,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 53 transitions, 421 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-19 09:18:06,641 INFO L231 Difference]: Finished difference. Result has 77 places, 50 transitions, 380 flow [2024-11-19 09:18:06,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=77, PETRI_TRANSITIONS=50} [2024-11-19 09:18:06,641 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-11-19 09:18:06,641 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 50 transitions, 380 flow [2024-11-19 09:18:06,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-11-19 09:18:06,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:06,642 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:06,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-11-19 09:18:06,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:06,847 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:06,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash -241182104, now seen corresponding path program 1 times [2024-11-19 09:18:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107066484] [2024-11-19 09:18:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:18:06,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:06,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:06,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-11-19 09:18:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:18:06,934 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:18:06,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:07,134 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 17 treesize of output 9 [2024-11-19 09:18:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:07,142 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:07,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:07,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107066484] [2024-11-19 09:18:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107066484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:07,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-19 09:18:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470468812] [2024-11-19 09:18:07,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:07,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:18:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:18:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:18:07,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:18:07,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 50 transitions, 380 flow. Second operand has 14 states, 14 states have (on average 22.714285714285715) internal successors, (318), 14 states have internal predecessors, (318), 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) [2024-11-19 09:18:07,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:07,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:18:07,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:07,854 INFO L124 PetriNetUnfolderBase]: 32/164 cut-off events. [2024-11-19 09:18:07,854 INFO L125 PetriNetUnfolderBase]: For 641/641 co-relation queries the response was YES. [2024-11-19 09:18:07,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 164 events. 32/164 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 230 event pairs, 11 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 582. Up to 50 conditions per place. [2024-11-19 09:18:07,855 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 27 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2024-11-19 09:18:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 56 transitions, 457 flow [2024-11-19 09:18:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:18:07,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:18:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-11-19 09:18:07,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5368217054263565 [2024-11-19 09:18:07,857 INFO L175 Difference]: Start difference. First operand has 77 places, 50 transitions, 380 flow. Second operand 12 states and 277 transitions. [2024-11-19 09:18:07,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 56 transitions, 457 flow [2024-11-19 09:18:07,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 56 transitions, 419 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-19 09:18:07,864 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 347 flow [2024-11-19 09:18:07,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=347, PETRI_PLACES=78, PETRI_TRANSITIONS=47} [2024-11-19 09:18:07,865 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-11-19 09:18:07,865 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 347 flow [2024-11-19 09:18:07,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.714285714285715) internal successors, (318), 14 states have internal predecessors, (318), 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) [2024-11-19 09:18:07,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:07,866 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:07,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-11-19 09:18:08,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:08,067 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:08,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash -508733477, now seen corresponding path program 2 times [2024-11-19 09:18:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755514681] [2024-11-19 09:18:08,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:18:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:08,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:08,072 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:08,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-19 09:18:08,197 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:18:08,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:08,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:18:08,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:08,248 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 6 treesize of output 5 [2024-11-19 09:18:09,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2024-11-19 09:18:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:09,246 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:09,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755514681] [2024-11-19 09:18:09,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755514681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:09,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:09,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-19 09:18:09,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915469291] [2024-11-19 09:18:09,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:09,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:18:09,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:18:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:18:10,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:18:10,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 47 transitions, 347 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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) [2024-11-19 09:18:10,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:10,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:18:10,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:12,105 INFO L124 PetriNetUnfolderBase]: 48/216 cut-off events. [2024-11-19 09:18:12,105 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2024-11-19 09:18:12,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819 conditions, 216 events. 48/216 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 299 event pairs, 4 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 777. Up to 40 conditions per place. [2024-11-19 09:18:12,107 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 25 changer transitions 0/86 dead transitions. [2024-11-19 09:18:12,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 86 transitions, 689 flow [2024-11-19 09:18:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-19 09:18:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-19 09:18:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 451 transitions. [2024-11-19 09:18:12,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-11-19 09:18:12,110 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 347 flow. Second operand 22 states and 451 transitions. [2024-11-19 09:18:12,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 86 transitions, 689 flow [2024-11-19 09:18:12,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 643 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-19 09:18:12,115 INFO L231 Difference]: Finished difference. Result has 95 places, 57 transitions, 474 flow [2024-11-19 09:18:12,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=474, PETRI_PLACES=95, PETRI_TRANSITIONS=57} [2024-11-19 09:18:12,117 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-11-19 09:18:12,117 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 57 transitions, 474 flow [2024-11-19 09:18:12,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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) [2024-11-19 09:18:12,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:12,118 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:12,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:18:12,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:12,319 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:12,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:12,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2060058934, now seen corresponding path program 3 times [2024-11-19 09:18:12,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973875971] [2024-11-19 09:18:12,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:18:12,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:12,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:12,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:12,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-19 09:18:12,449 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 09:18:12,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:12,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:18:12,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:12,499 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 6 treesize of output 5 [2024-11-19 09:18:13,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2024-11-19 09:18:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:13,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:14,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973875971] [2024-11-19 09:18:14,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973875971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:14,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:14,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-19 09:18:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81111241] [2024-11-19 09:18:14,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:14,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-19 09:18:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-19 09:18:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2024-11-19 09:18:15,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:18:15,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 57 transitions, 474 flow. Second operand has 22 states, 22 states have (on average 19.636363636363637) internal successors, (432), 22 states have internal predecessors, (432), 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) [2024-11-19 09:18:15,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:15,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:18:15,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:17,473 INFO L124 PetriNetUnfolderBase]: 51/245 cut-off events. [2024-11-19 09:18:17,473 INFO L125 PetriNetUnfolderBase]: For 1345/1345 co-relation queries the response was YES. [2024-11-19 09:18:17,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 245 events. 51/245 cut-off events. For 1345/1345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 339 event pairs, 4 based on Foata normal form. 6/251 useless extension candidates. Maximal degree in co-relation 963. Up to 45 conditions per place. [2024-11-19 09:18:17,476 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 54 selfloop transitions, 28 changer transitions 0/94 dead transitions. [2024-11-19 09:18:17,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 94 transitions, 816 flow [2024-11-19 09:18:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-19 09:18:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-19 09:18:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 527 transitions. [2024-11-19 09:18:17,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47137745974955275 [2024-11-19 09:18:17,481 INFO L175 Difference]: Start difference. First operand has 95 places, 57 transitions, 474 flow. Second operand 26 states and 527 transitions. [2024-11-19 09:18:17,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 94 transitions, 816 flow [2024-11-19 09:18:17,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 94 transitions, 794 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-19 09:18:17,490 INFO L231 Difference]: Finished difference. Result has 115 places, 61 transitions, 579 flow [2024-11-19 09:18:17,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=579, PETRI_PLACES=115, PETRI_TRANSITIONS=61} [2024-11-19 09:18:17,490 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-11-19 09:18:17,491 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 61 transitions, 579 flow [2024-11-19 09:18:17,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.636363636363637) internal successors, (432), 22 states have internal predecessors, (432), 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) [2024-11-19 09:18:17,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:17,492 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:17,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-11-19 09:18:17,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:17,693 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:17,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:17,694 INFO L85 PathProgramCache]: Analyzing trace with hash -501615939, now seen corresponding path program 4 times [2024-11-19 09:18:17,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:17,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207618835] [2024-11-19 09:18:17,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:18:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:17,697 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:17,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-11-19 09:18:17,793 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:18:17,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:17,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:18:17,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:18,159 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 17 treesize of output 9 [2024-11-19 09:18:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:18,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:18,397 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:18,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207618835] [2024-11-19 09:18:18,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207618835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:18,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:18,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-19 09:18:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088804609] [2024-11-19 09:18:18,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:18,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:18:18,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:18:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:18:18,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-11-19 09:18:18,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 61 transitions, 579 flow. Second operand has 20 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 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) [2024-11-19 09:18:18,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:18,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-11-19 09:18:18,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:19,505 INFO L124 PetriNetUnfolderBase]: 35/227 cut-off events. [2024-11-19 09:18:19,505 INFO L125 PetriNetUnfolderBase]: For 1571/1571 co-relation queries the response was YES. [2024-11-19 09:18:19,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1013 conditions, 227 events. 35/227 cut-off events. For 1571/1571 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 11 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 955. Up to 46 conditions per place. [2024-11-19 09:18:19,507 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 26 changer transitions 0/75 dead transitions. [2024-11-19 09:18:19,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 75 transitions, 708 flow [2024-11-19 09:18:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 09:18:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 09:18:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 409 transitions. [2024-11-19 09:18:19,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5284237726098191 [2024-11-19 09:18:19,509 INFO L175 Difference]: Start difference. First operand has 115 places, 61 transitions, 579 flow. Second operand 18 states and 409 transitions. [2024-11-19 09:18:19,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 75 transitions, 708 flow [2024-11-19 09:18:19,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 75 transitions, 662 flow, removed 4 selfloop flow, removed 19 redundant places. [2024-11-19 09:18:19,518 INFO L231 Difference]: Finished difference. Result has 114 places, 60 transitions, 574 flow [2024-11-19 09:18:19,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=574, PETRI_PLACES=114, PETRI_TRANSITIONS=60} [2024-11-19 09:18:19,518 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-11-19 09:18:19,518 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 60 transitions, 574 flow [2024-11-19 09:18:19,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 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) [2024-11-19 09:18:19,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:19,519 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:19,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-11-19 09:18:19,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:19,720 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:19,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1745514836, now seen corresponding path program 3 times [2024-11-19 09:18:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398042794] [2024-11-19 09:18:19,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:18:19,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:19,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:19,722 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:19,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-19 09:18:19,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:18:19,794 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:19,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-19 09:18:19,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:19,822 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:18:19,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 09:18:20,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:18:20,203 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 17 [2024-11-19 09:18:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 09:18:20,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:18:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-19 09:18:26,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-11-19 09:18:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398042794] [2024-11-19 09:18:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398042794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:18:26,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:18:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-11-19 09:18:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421373945] [2024-11-19 09:18:26,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 09:18:26,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:18:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-11-19 09:18:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:18:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2024-11-19 09:18:28,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:18:28,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 60 transitions, 574 flow. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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) [2024-11-19 09:18:28,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:18:28,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:18:28,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:18:29,629 INFO L124 PetriNetUnfolderBase]: 48/230 cut-off events. [2024-11-19 09:18:29,629 INFO L125 PetriNetUnfolderBase]: For 1624/1624 co-relation queries the response was YES. [2024-11-19 09:18:29,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 230 events. 48/230 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 277 event pairs, 3 based on Foata normal form. 10/240 useless extension candidates. Maximal degree in co-relation 933. Up to 74 conditions per place. [2024-11-19 09:18:29,631 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 28 changer transitions 0/62 dead transitions. [2024-11-19 09:18:29,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 62 transitions, 660 flow [2024-11-19 09:18:29,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:18:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:18:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-11-19 09:18:29,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-11-19 09:18:29,632 INFO L175 Difference]: Start difference. First operand has 114 places, 60 transitions, 574 flow. Second operand 6 states and 128 transitions. [2024-11-19 09:18:29,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 62 transitions, 660 flow [2024-11-19 09:18:29,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 62 transitions, 578 flow, removed 0 selfloop flow, removed 24 redundant places. [2024-11-19 09:18:29,641 INFO L231 Difference]: Finished difference. Result has 94 places, 59 transitions, 530 flow [2024-11-19 09:18:29,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=530, PETRI_PLACES=94, PETRI_TRANSITIONS=59} [2024-11-19 09:18:29,642 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-11-19 09:18:29,642 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 59 transitions, 530 flow [2024-11-19 09:18:29,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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) [2024-11-19 09:18:29,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:18:29,643 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:18:29,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-11-19 09:18:29,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:29,843 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-19 09:18:29,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:18:29,844 INFO L85 PathProgramCache]: Analyzing trace with hash -178625788, now seen corresponding path program 5 times [2024-11-19 09:18:29,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-11-19 09:18:29,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671440691] [2024-11-19 09:18:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:18:29,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-19 09:18:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-11-19 09:18:29,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-19 09:18:29,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-11-19 09:18:29,987 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-19 09:18:29,987 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:18:29,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 09:18:29,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:18:30,368 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 17 treesize of output 13 [2024-11-19 09:18:30,375 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 22 treesize of output 14 [2024-11-19 09:18:30,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-19 09:18:30,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2024-11-19 09:18:31,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2024-11-19 09:18:31,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 55 [2024-11-19 09:18:32,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2024-11-19 09:18:32,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 77 [2024-11-19 09:18:33,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:18:33,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 88 [2024-11-19 09:18:34,164 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:18:34,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 55 [2024-11-19 09:18:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:18:34,251 INFO L311 TraceCheckSpWp]: Computing backward predicates...