./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 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 0.3.0-?-551b009-m [2025-01-10 00:34:37,875 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:34:37,945 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 00:34:37,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:34:37,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:34:37,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:34:37,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:34:37,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:34:37,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:34:37,982 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:34:37,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:34:37,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:34:37,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:34:37,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:34:37,983 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:34:37,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:34:37,984 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:34:37,985 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:34:37,985 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:34:37,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:34:37,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:34:37,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:34:37,986 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:34:37,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 00:34:37,987 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:34:37,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:34:37,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:34:37,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:34:37,988 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 [2025-01-10 00:34:38,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:34:38,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:34:38,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:34:38,301 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:34:38,301 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:34:38,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2025-01-10 00:34:39,669 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8cd3d835c/e79115d8d8124bd3be450a3880b8a7b0/FLAG3ec7e257a [2025-01-10 00:34:40,071 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:34:40,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2025-01-10 00:34:40,095 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8cd3d835c/e79115d8d8124bd3be450a3880b8a7b0/FLAG3ec7e257a [2025-01-10 00:34:40,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8cd3d835c/e79115d8d8124bd3be450a3880b8a7b0 [2025-01-10 00:34:40,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:34:40,120 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:34:40,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:34:40,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:34:40,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:34:40,128 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,129 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d1c6a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40, skipping insertion in model container [2025-01-10 00:34:40,129 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,171 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:34:40,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:34:40,533 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 00:34:40,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:34:40,653 INFO L204 MainTranslator]: Completed translation [2025-01-10 00:34:40,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40 WrapperNode [2025-01-10 00:34:40,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:34:40,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 00:34:40,655 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 00:34:40,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 00:34:40,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,688 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2025-01-10 00:34:40,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 00:34:40,689 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 00:34:40,689 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 00:34:40,689 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 00:34:40,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,697 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,712 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]. [2025-01-10 00:34:40,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,717 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,720 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,722 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,723 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 00:34:40,728 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 00:34:40,728 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 00:34:40,728 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 00:34:40,729 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (1/1) ... [2025-01-10 00:34:40,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:34:40,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:40,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 00:34:40,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 00:34:40,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-01-10 00:34:40,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 00:34:40,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 00:34:40,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-01-10 00:34:40,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 00:34:40,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 00:34:40,793 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 00:34:40,906 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 00:34:40,907 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 00:34:41,067 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 00:34:41,068 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 00:34:41,170 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 00:34:41,170 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-10 00:34:41,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:34:41 BoogieIcfgContainer [2025-01-10 00:34:41,171 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 00:34:41,173 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 00:34:41,173 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 00:34:41,177 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 00:34:41,177 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:34:40" (1/3) ... [2025-01-10 00:34:41,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447d7b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:34:41, skipping insertion in model container [2025-01-10 00:34:41,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:34:40" (2/3) ... [2025-01-10 00:34:41,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447d7b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:34:41, skipping insertion in model container [2025-01-10 00:34:41,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:34:41" (3/3) ... [2025-01-10 00:34:41,180 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-01-10 00:34:41,193 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 00:34:41,194 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 39 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-01-10 00:34:41,194 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 00:34:41,245 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 00:34:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2025-01-10 00:34:41,309 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2025-01-10 00:34:41,312 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:34:41,336 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. [2025-01-10 00:34:41,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2025-01-10 00:34:41,344 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2025-01-10 00:34:41,354 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 00:34:41,371 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;@6aa709ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 00:34:41,371 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-01-10 00:34:41,380 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 00:34:41,381 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-01-10 00:34:41,381 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:34:41,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:41,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:41,382 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:41,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash -976161480, now seen corresponding path program 1 times [2025-01-10 00:34:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:41,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926752391] [2025-01-10 00:34:41,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:41,486 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:34:41,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:34:41,522 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:41,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:41,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:41,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926752391] [2025-01-10 00:34:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926752391] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:41,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:41,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:34:41,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683317562] [2025-01-10 00:34:41,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:41,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:34:41,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:41,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:34:41,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:34:41,931 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2025-01-10 00:34:41,934 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) [2025-01-10 00:34:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:41,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2025-01-10 00:34:41,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:42,023 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2025-01-10 00:34:42,025 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:34:42,025 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. [2025-01-10 00:34:42,027 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 18 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2025-01-10 00:34:42,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 124 flow [2025-01-10 00:34:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:34:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:34:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-01-10 00:34:42,041 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2025-01-10 00:34:42,043 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 90 transitions. [2025-01-10 00:34:42,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 124 flow [2025-01-10 00:34:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:34:42,049 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2025-01-10 00:34:42,052 INFO L262 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} [2025-01-10 00:34:42,055 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-01-10 00:34:42,055 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2025-01-10 00:34:42,056 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) [2025-01-10 00:34:42,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:42,056 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:42,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 00:34:42,056 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:42,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash -196234554, now seen corresponding path program 1 times [2025-01-10 00:34:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:42,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489914] [2025-01-10 00:34:42,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:42,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:42,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:34:42,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:34:42,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:42,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:42,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:42,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489914] [2025-01-10 00:34:42,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489914] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:42,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:42,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:34:42,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135552801] [2025-01-10 00:34:42,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:42,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:34:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:42,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:34:42,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:34:42,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:34:42,305 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) [2025-01-10 00:34:42,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:42,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:34:42,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:42,416 INFO L124 PetriNetUnfolderBase]: 15/72 cut-off events. [2025-01-10 00:34:42,416 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 00:34:42,416 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. [2025-01-10 00:34:42,417 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2025-01-10 00:34:42,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 138 flow [2025-01-10 00:34:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:34:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:34:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-01-10 00:34:42,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2025-01-10 00:34:42,420 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 95 transitions. [2025-01-10 00:34:42,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 138 flow [2025-01-10 00:34:42,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:34:42,422 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2025-01-10 00:34:42,422 INFO L262 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} [2025-01-10 00:34:42,425 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-01-10 00:34:42,426 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2025-01-10 00:34:42,427 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) [2025-01-10 00:34:42,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:42,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:42,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 00:34:42,427 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:42,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:42,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1788303622, now seen corresponding path program 1 times [2025-01-10 00:34:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941160051] [2025-01-10 00:34:42,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:42,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 00:34:42,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 00:34:42,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:42,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:42,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:42,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941160051] [2025-01-10 00:34:42,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941160051] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:42,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:42,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:34:42,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905875036] [2025-01-10 00:34:42,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:42,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:34:42,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:42,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:34:42,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:34:42,590 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:34:42,591 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) [2025-01-10 00:34:42,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:42,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:34:42,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:42,661 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2025-01-10 00:34:42,662 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-01-10 00:34:42,663 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. [2025-01-10 00:34:42,664 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-01-10 00:34:42,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2025-01-10 00:34:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:34:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:34:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-01-10 00:34:42,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2025-01-10 00:34:42,669 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2025-01-10 00:34:42,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2025-01-10 00:34:42,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:34:42,672 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2025-01-10 00:34:42,672 INFO L262 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} [2025-01-10 00:34:42,673 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-01-10 00:34:42,673 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2025-01-10 00:34:42,673 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) [2025-01-10 00:34:42,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:42,673 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:42,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 00:34:42,673 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:42,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1954874215, now seen corresponding path program 1 times [2025-01-10 00:34:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867087677] [2025-01-10 00:34:42,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:42,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 00:34:42,688 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 00:34:42,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:42,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867087677] [2025-01-10 00:34:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867087677] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:34:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396422958] [2025-01-10 00:34:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:42,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:34:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:42,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:34:42,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:34:42,729 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:34:42,730 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) [2025-01-10 00:34:42,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:42,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:34:42,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:42,782 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2025-01-10 00:34:42,783 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-01-10 00:34:42,783 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. [2025-01-10 00:34:42,787 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2025-01-10 00:34:42,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2025-01-10 00:34:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:34:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:34:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-01-10 00:34:42,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-01-10 00:34:42,788 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2025-01-10 00:34:42,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2025-01-10 00:34:42,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:34:42,789 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2025-01-10 00:34:42,790 INFO L262 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} [2025-01-10 00:34:42,790 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2025-01-10 00:34:42,790 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2025-01-10 00:34:42,790 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) [2025-01-10 00:34:42,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:42,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:42,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 00:34:42,792 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:42,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1953818464, now seen corresponding path program 1 times [2025-01-10 00:34:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208413647] [2025-01-10 00:34:42,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:42,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 00:34:42,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 00:34:42,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:42,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208413647] [2025-01-10 00:34:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208413647] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:42,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:42,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:34:42,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874650588] [2025-01-10 00:34:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:42,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:34:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:42,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:34:42,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:34:42,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-01-10 00:34:42,979 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) [2025-01-10 00:34:42,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:42,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-01-10 00:34:42,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:43,054 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2025-01-10 00:34:43,057 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 00:34:43,057 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. [2025-01-10 00:34:43,058 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-01-10 00:34:43,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2025-01-10 00:34:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:34:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:34:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-01-10 00:34:43,061 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2025-01-10 00:34:43,061 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2025-01-10 00:34:43,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2025-01-10 00:34:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:34:43,062 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2025-01-10 00:34:43,062 INFO L262 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} [2025-01-10 00:34:43,063 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-01-10 00:34:43,063 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2025-01-10 00:34:43,063 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) [2025-01-10 00:34:43,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:43,063 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:43,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-10 00:34:43,063 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:43,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash 696805413, now seen corresponding path program 1 times [2025-01-10 00:34:43,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298982679] [2025-01-10 00:34:43,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:43,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:43,075 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 00:34:43,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 00:34:43,085 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:43,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298982679] [2025-01-10 00:34:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298982679] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321130866] [2025-01-10 00:34:43,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:43,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:43,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:43,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 00:34:43,344 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 00:34:43,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 00:34:43,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:43,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:43,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 00:34:43,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:43,460 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 00:34:43,461 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 [2025-01-10 00:34:43,471 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 [2025-01-10 00:34:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:43,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:43,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321130866] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:43,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:43,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2025-01-10 00:34:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123371132] [2025-01-10 00:34:43,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:43,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-10 00:34:43,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:43,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-10 00:34:43,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-01-10 00:34:44,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-01-10 00:34:44,121 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) [2025-01-10 00:34:44,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:44,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-01-10 00:34:44,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:44,337 INFO L124 PetriNetUnfolderBase]: 30/120 cut-off events. [2025-01-10 00:34:44,337 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-01-10 00:34:44,337 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. [2025-01-10 00:34:44,338 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2025-01-10 00:34:44,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 220 flow [2025-01-10 00:34:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 00:34:44,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 00:34:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2025-01-10 00:34:44,340 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5049833887043189 [2025-01-10 00:34:44,340 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 7 states and 152 transitions. [2025-01-10 00:34:44,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 220 flow [2025-01-10 00:34:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:34:44,342 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 150 flow [2025-01-10 00:34:44,342 INFO L262 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} [2025-01-10 00:34:44,343 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2025-01-10 00:34:44,343 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 150 flow [2025-01-10 00:34:44,343 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) [2025-01-10 00:34:44,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:44,343 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:44,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 00:34:44,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:44,548 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:44,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1762716273, now seen corresponding path program 1 times [2025-01-10 00:34:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300552961] [2025-01-10 00:34:44,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:44,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:44,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:34:44,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:34:44,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:44,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300552961] [2025-01-10 00:34:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300552961] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816176217] [2025-01-10 00:34:44,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:44,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:44,710 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:44,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 00:34:44,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:34:44,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:34:44,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:44,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:44,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 00:34:44,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:44,797 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 [2025-01-10 00:34:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:44,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816176217] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:45,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-01-10 00:34:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141247966] [2025-01-10 00:34:45,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:45,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-01-10 00:34:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:45,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-01-10 00:34:45,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-01-10 00:34:45,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:34:45,178 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) [2025-01-10 00:34:45,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:45,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:34:45,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:45,339 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2025-01-10 00:34:45,339 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-01-10 00:34:45,340 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. [2025-01-10 00:34:45,341 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-01-10 00:34:45,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 248 flow [2025-01-10 00:34:45,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 00:34:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 00:34:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2025-01-10 00:34:45,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2025-01-10 00:34:45,342 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 150 flow. Second operand 7 states and 166 transitions. [2025-01-10 00:34:45,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 248 flow [2025-01-10 00:34:45,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 232 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-01-10 00:34:45,345 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 184 flow [2025-01-10 00:34:45,345 INFO L262 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} [2025-01-10 00:34:45,346 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2025-01-10 00:34:45,346 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 184 flow [2025-01-10 00:34:45,346 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) [2025-01-10 00:34:45,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:45,346 INFO L206 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] [2025-01-10 00:34:45,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-10 00:34:45,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:45,551 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:45,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1316447649, now seen corresponding path program 1 times [2025-01-10 00:34:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:45,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373021213] [2025-01-10 00:34:45,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:45,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-10 00:34:45,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-10 00:34:45,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:45,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:45,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:45,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373021213] [2025-01-10 00:34:45,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373021213] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:45,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:45,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 00:34:45,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336779013] [2025-01-10 00:34:45,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:45,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 00:34:45,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:45,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 00:34:45,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-01-10 00:34:45,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:34:45,858 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) [2025-01-10 00:34:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:34:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:46,028 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2025-01-10 00:34:46,028 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-01-10 00:34:46,029 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. [2025-01-10 00:34:46,030 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 28 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2025-01-10 00:34:46,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 283 flow [2025-01-10 00:34:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 00:34:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 00:34:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2025-01-10 00:34:46,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2025-01-10 00:34:46,031 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 184 flow. Second operand 10 states and 214 transitions. [2025-01-10 00:34:46,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 283 flow [2025-01-10 00:34:46,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 269 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 00:34:46,034 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 218 flow [2025-01-10 00:34:46,034 INFO L262 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} [2025-01-10 00:34:46,035 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2025-01-10 00:34:46,035 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 218 flow [2025-01-10 00:34:46,035 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) [2025-01-10 00:34:46,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:46,036 INFO L206 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] [2025-01-10 00:34:46,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 00:34:46,036 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:46,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash -815916709, now seen corresponding path program 1 times [2025-01-10 00:34:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:46,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312288413] [2025-01-10 00:34:46,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:46,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-10 00:34:46,052 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-10 00:34:46,052 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:46,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312288413] [2025-01-10 00:34:46,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312288413] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:34:46,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:34:46,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 00:34:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582311532] [2025-01-10 00:34:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:34:46,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 00:34:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:46,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 00:34:46,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-01-10 00:34:46,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-01-10 00:34:46,402 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) [2025-01-10 00:34:46,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:46,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-01-10 00:34:46,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:46,542 INFO L124 PetriNetUnfolderBase]: 20/115 cut-off events. [2025-01-10 00:34:46,542 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2025-01-10 00:34:46,543 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. [2025-01-10 00:34:46,543 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 21 selfloop transitions, 7 changer transitions 5/47 dead transitions. [2025-01-10 00:34:46,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 293 flow [2025-01-10 00:34:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 00:34:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 00:34:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2025-01-10 00:34:46,545 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2025-01-10 00:34:46,545 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 218 flow. Second operand 9 states and 201 transitions. [2025-01-10 00:34:46,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 293 flow [2025-01-10 00:34:46,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 47 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:34:46,548 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 203 flow [2025-01-10 00:34:46,549 INFO L262 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} [2025-01-10 00:34:46,549 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2025-01-10 00:34:46,549 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 203 flow [2025-01-10 00:34:46,550 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) [2025-01-10 00:34:46,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:46,550 INFO L206 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] [2025-01-10 00:34:46,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-01-10 00:34:46,550 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:46,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2043120856, now seen corresponding path program 1 times [2025-01-10 00:34:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:46,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791077480] [2025-01-10 00:34:46,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:46,559 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 00:34:46,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 00:34:46,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:46,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791077480] [2025-01-10 00:34:46,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791077480] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381303650] [2025-01-10 00:34:46,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:34:46,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:46,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:46,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:46,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 00:34:46,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 00:34:46,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 00:34:46,814 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:34:46,814 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:46,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-10 00:34:46,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:46,977 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 [2025-01-10 00:34:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:46,990 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381303650] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:47,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-01-10 00:34:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144296052] [2025-01-10 00:34:47,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:47,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 00:34:47,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:47,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 00:34:47,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-01-10 00:34:47,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:34:47,232 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) [2025-01-10 00:34:47,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:47,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:34:47,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:47,403 INFO L124 PetriNetUnfolderBase]: 19/107 cut-off events. [2025-01-10 00:34:47,403 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2025-01-10 00:34:47,404 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. [2025-01-10 00:34:47,404 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 6 changer transitions 1/43 dead transitions. [2025-01-10 00:34:47,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 266 flow [2025-01-10 00:34:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 00:34:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 00:34:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2025-01-10 00:34:47,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5614617940199336 [2025-01-10 00:34:47,406 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 203 flow. Second operand 7 states and 169 transitions. [2025-01-10 00:34:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 266 flow [2025-01-10 00:34:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 248 flow, removed 2 selfloop flow, removed 8 redundant places. [2025-01-10 00:34:47,408 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 195 flow [2025-01-10 00:34:47,408 INFO L262 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} [2025-01-10 00:34:47,409 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2025-01-10 00:34:47,409 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 195 flow [2025-01-10 00:34:47,409 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) [2025-01-10 00:34:47,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:47,409 INFO L206 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] [2025-01-10 00:34:47,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 00:34:47,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:47,610 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:47,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -17712933, now seen corresponding path program 2 times [2025-01-10 00:34:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:47,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863889373] [2025-01-10 00:34:47,611 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:47,621 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:34:47,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:34:47,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:34:47,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:47,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863889373] [2025-01-10 00:34:47,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863889373] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:47,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310845558] [2025-01-10 00:34:47,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:47,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:47,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:47,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:47,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 00:34:47,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:34:47,946 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:34:47,946 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:34:47,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:47,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 00:34:47,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:48,140 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 [2025-01-10 00:34:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:48,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310845558] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:48,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-01-10 00:34:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645525518] [2025-01-10 00:34:48,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:48,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-10 00:34:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:48,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-10 00:34:48,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-01-10 00:34:48,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:34:48,561 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) [2025-01-10 00:34:48,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:48,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:34:48,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:48,800 INFO L124 PetriNetUnfolderBase]: 15/101 cut-off events. [2025-01-10 00:34:48,801 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-01-10 00:34:48,801 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. [2025-01-10 00:34:48,802 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2025-01-10 00:34:48,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 262 flow [2025-01-10 00:34:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 00:34:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 00:34:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2025-01-10 00:34:48,803 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2025-01-10 00:34:48,803 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 195 flow. Second operand 8 states and 191 transitions. [2025-01-10 00:34:48,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 262 flow [2025-01-10 00:34:48,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 43 transitions, 250 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-01-10 00:34:48,805 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 202 flow [2025-01-10 00:34:48,806 INFO L262 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} [2025-01-10 00:34:48,806 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2025-01-10 00:34:48,806 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 202 flow [2025-01-10 00:34:48,807 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) [2025-01-10 00:34:48,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:48,807 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:48,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 00:34:49,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-01-10 00:34:49,008 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:49,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1167425722, now seen corresponding path program 2 times [2025-01-10 00:34:49,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:49,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350260470] [2025-01-10 00:34:49,009 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:49,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:49,017 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:34:49,027 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:34:49,030 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:34:49,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:49,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:49,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350260470] [2025-01-10 00:34:49,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350260470] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400112509] [2025-01-10 00:34:49,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:49,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:49,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:49,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:49,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 00:34:49,325 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:34:49,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:34:49,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:34:49,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:49,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-10 00:34:49,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:49,385 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 00:34:49,386 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 [2025-01-10 00:34:49,392 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 [2025-01-10 00:34:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:49,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400112509] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:49,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:49,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-01-10 00:34:49,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353145995] [2025-01-10 00:34:49,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:49,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-10 00:34:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:49,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-10 00:34:49,999 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2025-01-10 00:34:50,516 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-01-10 00:34:50,517 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) [2025-01-10 00:34:50,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:50,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-01-10 00:34:50,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:50,982 INFO L124 PetriNetUnfolderBase]: 48/190 cut-off events. [2025-01-10 00:34:50,982 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2025-01-10 00:34:50,983 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. [2025-01-10 00:34:50,984 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2025-01-10 00:34:50,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 486 flow [2025-01-10 00:34:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:34:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:34:50,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2025-01-10 00:34:50,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2025-01-10 00:34:50,985 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 202 flow. Second operand 11 states and 231 transitions. [2025-01-10 00:34:50,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 486 flow [2025-01-10 00:34:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-01-10 00:34:50,989 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 327 flow [2025-01-10 00:34:50,989 INFO L262 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} [2025-01-10 00:34:50,990 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2025-01-10 00:34:50,992 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 327 flow [2025-01-10 00:34:50,992 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) [2025-01-10 00:34:50,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:50,993 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:34:51,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 00:34:51,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-01-10 00:34:51,194 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:51,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 909662780, now seen corresponding path program 2 times [2025-01-10 00:34:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197142741] [2025-01-10 00:34:51,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:51,209 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-01-10 00:34:51,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-01-10 00:34:51,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 00:34:51,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:51,331 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-10 00:34:51,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197142741] [2025-01-10 00:34:51,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197142741] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:51,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278595487] [2025-01-10 00:34:51,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:34:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:51,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:51,334 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:51,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 00:34:51,387 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-01-10 00:34:51,400 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-01-10 00:34:51,400 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 00:34:51,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:51,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 00:34:51,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:51,432 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 00:34:51,433 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 [2025-01-10 00:34:51,440 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 [2025-01-10 00:34:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-10 00:34:51,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-10 00:34:52,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278595487] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:52,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:52,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-01-10 00:34:52,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714020760] [2025-01-10 00:34:52,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:52,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 00:34:52,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:52,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 00:34:52,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-01-10 00:34:52,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-01-10 00:34:52,590 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) [2025-01-10 00:34:52,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:52,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-01-10 00:34:52,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:52,770 INFO L124 PetriNetUnfolderBase]: 55/189 cut-off events. [2025-01-10 00:34:52,771 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2025-01-10 00:34:52,771 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. [2025-01-10 00:34:52,772 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 19 changer transitions 0/51 dead transitions. [2025-01-10 00:34:52,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 51 transitions, 415 flow [2025-01-10 00:34:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:34:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:34:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2025-01-10 00:34:52,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2025-01-10 00:34:52,774 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 327 flow. Second operand 6 states and 116 transitions. [2025-01-10 00:34:52,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 51 transitions, 415 flow [2025-01-10 00:34:52,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 51 transitions, 390 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-01-10 00:34:52,781 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 347 flow [2025-01-10 00:34:52,781 INFO L262 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} [2025-01-10 00:34:52,781 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2025-01-10 00:34:52,782 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 347 flow [2025-01-10 00:34:52,782 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) [2025-01-10 00:34:52,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:52,784 INFO L206 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] [2025-01-10 00:34:52,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-10 00:34:52,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-10 00:34:52,985 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:52,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -866977162, now seen corresponding path program 3 times [2025-01-10 00:34:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526469120] [2025-01-10 00:34:52,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:34:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:52,994 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-01-10 00:34:53,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 00:34:53,020 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-10 00:34:53,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:53,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526469120] [2025-01-10 00:34:53,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526469120] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:53,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377582515] [2025-01-10 00:34:53,479 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:34:53,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:53,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:53,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:53,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 00:34:53,538 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-01-10 00:34:53,575 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 00:34:53,575 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-10 00:34:53,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:53,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 00:34:53,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:53,810 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 [2025-01-10 00:34:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:53,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377582515] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:53,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:53,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-01-10 00:34:53,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732378871] [2025-01-10 00:34:53,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:53,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 00:34:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:53,964 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 00:34:53,964 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-01-10 00:34:54,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-01-10 00:34:54,400 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) [2025-01-10 00:34:54,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:54,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-01-10 00:34:54,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:54,761 INFO L124 PetriNetUnfolderBase]: 40/172 cut-off events. [2025-01-10 00:34:54,761 INFO L125 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2025-01-10 00:34:54,762 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. [2025-01-10 00:34:54,763 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 38 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2025-01-10 00:34:54,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 57 transitions, 474 flow [2025-01-10 00:34:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 00:34:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 00:34:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2025-01-10 00:34:54,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5372093023255814 [2025-01-10 00:34:54,768 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 347 flow. Second operand 10 states and 231 transitions. [2025-01-10 00:34:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 57 transitions, 474 flow [2025-01-10 00:34:54,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 57 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:34:54,772 INFO L231 Difference]: Finished difference. Result has 78 places, 47 transitions, 343 flow [2025-01-10 00:34:54,772 INFO L262 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} [2025-01-10 00:34:54,773 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2025-01-10 00:34:54,773 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 47 transitions, 343 flow [2025-01-10 00:34:54,773 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) [2025-01-10 00:34:54,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:54,774 INFO L206 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] [2025-01-10 00:34:54,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 00:34:54,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:54,978 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:54,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1357974953, now seen corresponding path program 4 times [2025-01-10 00:34:54,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:54,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030986581] [2025-01-10 00:34:54,979 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 00:34:54,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:54,987 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-01-10 00:34:54,996 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 00:34:54,996 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 00:34:54,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:55,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030986581] [2025-01-10 00:34:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030986581] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65036520] [2025-01-10 00:34:55,229 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 00:34:55,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:55,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:55,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:55,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 00:34:55,285 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-01-10 00:34:55,317 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 00:34:55,317 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 00:34:55,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:55,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 00:34:55,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:55,597 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 [2025-01-10 00:34:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:55,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65036520] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:55,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-01-10 00:34:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813617291] [2025-01-10 00:34:55,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:55,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-01-10 00:34:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:55,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-01-10 00:34:55,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2025-01-10 00:34:56,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:34:56,140 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) [2025-01-10 00:34:56,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:56,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:34:56,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:56,369 INFO L124 PetriNetUnfolderBase]: 29/159 cut-off events. [2025-01-10 00:34:56,369 INFO L125 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-01-10 00:34:56,370 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. [2025-01-10 00:34:56,371 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2025-01-10 00:34:56,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 54 transitions, 435 flow [2025-01-10 00:34:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 00:34:56,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 00:34:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2025-01-10 00:34:56,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2025-01-10 00:34:56,373 INFO L175 Difference]: Start difference. First operand has 78 places, 47 transitions, 343 flow. Second operand 10 states and 237 transitions. [2025-01-10 00:34:56,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 54 transitions, 435 flow [2025-01-10 00:34:56,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 54 transitions, 413 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-01-10 00:34:56,377 INFO L231 Difference]: Finished difference. Result has 81 places, 47 transitions, 345 flow [2025-01-10 00:34:56,377 INFO L262 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} [2025-01-10 00:34:56,378 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2025-01-10 00:34:56,378 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 47 transitions, 345 flow [2025-01-10 00:34:56,378 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) [2025-01-10 00:34:56,378 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:56,379 INFO L206 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] [2025-01-10 00:34:56,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-01-10 00:34:56,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-10 00:34:56,580 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:56,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:56,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1089227216, now seen corresponding path program 5 times [2025-01-10 00:34:56,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:56,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912564081] [2025-01-10 00:34:56,580 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 00:34:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:56,592 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-01-10 00:34:56,609 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-01-10 00:34:56,609 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-10 00:34:56,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912564081] [2025-01-10 00:34:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912564081] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475507573] [2025-01-10 00:34:56,851 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 00:34:56,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:56,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:56,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:56,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 00:34:56,915 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-01-10 00:34:56,945 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-01-10 00:34:56,945 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-10 00:34:56,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:56,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-10 00:34:56,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:57,249 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 [2025-01-10 00:34:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:57,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475507573] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:57,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:57,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-01-10 00:34:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355264695] [2025-01-10 00:34:57,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:57,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-10 00:34:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:57,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-10 00:34:57,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-01-10 00:34:57,977 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:34:57,978 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) [2025-01-10 00:34:57,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:34:57,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:34:57,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:34:58,293 INFO L124 PetriNetUnfolderBase]: 26/154 cut-off events. [2025-01-10 00:34:58,293 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2025-01-10 00:34:58,294 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. [2025-01-10 00:34:58,295 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 10 changer transitions 0/55 dead transitions. [2025-01-10 00:34:58,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 55 transitions, 443 flow [2025-01-10 00:34:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:34:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:34:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2025-01-10 00:34:58,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5496828752642706 [2025-01-10 00:34:58,297 INFO L175 Difference]: Start difference. First operand has 81 places, 47 transitions, 345 flow. Second operand 11 states and 260 transitions. [2025-01-10 00:34:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 55 transitions, 443 flow [2025-01-10 00:34:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 55 transitions, 419 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-01-10 00:34:58,302 INFO L231 Difference]: Finished difference. Result has 85 places, 47 transitions, 349 flow [2025-01-10 00:34:58,303 INFO L262 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} [2025-01-10 00:34:58,304 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2025-01-10 00:34:58,304 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 47 transitions, 349 flow [2025-01-10 00:34:58,305 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) [2025-01-10 00:34:58,306 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:34:58,306 INFO L206 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] [2025-01-10 00:34:58,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 00:34:58,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:58,507 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:34:58,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:34:58,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2013160073, now seen corresponding path program 6 times [2025-01-10 00:34:58,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:34:58,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025979376] [2025-01-10 00:34:58,508 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 00:34:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:34:58,519 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-01-10 00:34:58,541 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-01-10 00:34:58,541 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-10 00:34:58,541 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:58,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:34:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025979376] [2025-01-10 00:34:58,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025979376] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:34:58,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428168890] [2025-01-10 00:34:58,853 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 00:34:58,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:34:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:34:58,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:34:58,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 00:34:58,912 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-01-10 00:34:58,964 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-01-10 00:34:58,964 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-10 00:34:58,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:34:58,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-10 00:34:58,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:34:59,318 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 [2025-01-10 00:34:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:59,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:34:59,502 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:34:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428168890] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:34:59,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:34:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2025-01-10 00:34:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166412789] [2025-01-10 00:34:59,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:34:59,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-10 00:34:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:34:59,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-10 00:34:59,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2025-01-10 00:35:00,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:35:00,147 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) [2025-01-10 00:35:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:35:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:00,581 INFO L124 PetriNetUnfolderBase]: 23/155 cut-off events. [2025-01-10 00:35:00,581 INFO L125 PetriNetUnfolderBase]: For 651/651 co-relation queries the response was YES. [2025-01-10 00:35:00,582 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. [2025-01-10 00:35:00,583 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2025-01-10 00:35:00,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 56 transitions, 453 flow [2025-01-10 00:35:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 00:35:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 00:35:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2025-01-10 00:35:00,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5484496124031008 [2025-01-10 00:35:00,584 INFO L175 Difference]: Start difference. First operand has 85 places, 47 transitions, 349 flow. Second operand 12 states and 283 transitions. [2025-01-10 00:35:00,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 56 transitions, 453 flow [2025-01-10 00:35:00,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 56 transitions, 425 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-01-10 00:35:00,589 INFO L231 Difference]: Finished difference. Result has 89 places, 47 transitions, 353 flow [2025-01-10 00:35:00,589 INFO L262 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} [2025-01-10 00:35:00,589 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2025-01-10 00:35:00,590 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 47 transitions, 353 flow [2025-01-10 00:35:00,590 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) [2025-01-10 00:35:00,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:00,590 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:00,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 00:35:00,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 00:35:00,791 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:00,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -828021418, now seen corresponding path program 3 times [2025-01-10 00:35:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:35:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438887187] [2025-01-10 00:35:00,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:35:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:35:00,799 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-01-10 00:35:00,803 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-01-10 00:35:00,803 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 00:35:00,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-01-10 00:35:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 00:35:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438887187] [2025-01-10 00:35:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438887187] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 00:35:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261009319] [2025-01-10 00:35:00,983 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:35:00,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:00,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:00,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 00:35:01,041 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-01-10 00:35:01,057 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-01-10 00:35:01,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 00:35:01,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:01,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-01-10 00:35:01,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:01,085 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-01-10 00:35:01,086 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 [2025-01-10 00:35:01,091 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 [2025-01-10 00:35:01,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:35:01,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2025-01-10 00:35:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-01-10 00:35:01,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-01-10 00:35:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261009319] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:01,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 00:35:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-01-10 00:35:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163113358] [2025-01-10 00:35:01,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:01,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 00:35:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 00:35:01,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 00:35:01,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2025-01-10 00:35:02,115 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-01-10 00:35:02,116 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) [2025-01-10 00:35:02,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:02,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-01-10 00:35:02,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:02,305 INFO L124 PetriNetUnfolderBase]: 41/171 cut-off events. [2025-01-10 00:35:02,305 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2025-01-10 00:35:02,306 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. [2025-01-10 00:35:02,307 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 23 selfloop transitions, 19 changer transitions 0/50 dead transitions. [2025-01-10 00:35:02,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 50 transitions, 427 flow [2025-01-10 00:35:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:35:02,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:35:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-01-10 00:35:02,308 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2025-01-10 00:35:02,308 INFO L175 Difference]: Start difference. First operand has 89 places, 47 transitions, 353 flow. Second operand 6 states and 112 transitions. [2025-01-10 00:35:02,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 50 transitions, 427 flow [2025-01-10 00:35:02,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 50 transitions, 370 flow, removed 6 selfloop flow, removed 18 redundant places. [2025-01-10 00:35:02,314 INFO L231 Difference]: Finished difference. Result has 75 places, 46 transitions, 316 flow [2025-01-10 00:35:02,314 INFO L262 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} [2025-01-10 00:35:02,315 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2025-01-10 00:35:02,316 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 46 transitions, 316 flow [2025-01-10 00:35:02,316 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) [2025-01-10 00:35:02,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:02,316 INFO L206 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] [2025-01-10 00:35:02,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 00:35:02,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 00:35:02,517 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:02,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1463024146, now seen corresponding path program 7 times [2025-01-10 00:35:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 00:35:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2425982] [2025-01-10 00:35:02,517 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 00:35:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 00:35:02,525 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-10 00:35:02,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-10 00:35:02,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:02,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 00:35:02,536 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-10 00:35:02,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-10 00:35:02,550 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-10 00:35:02,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:02,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 00:35:02,577 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-10 00:35:02,577 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-10 00:35:02,578 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-01-10 00:35:02,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-01-10 00:35:02,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-01-10 00:35:02,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-01-10 00:35:02,582 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:02,652 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-10 00:35:02,652 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-10 00:35:02,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:35:02 BasicIcfg [2025-01-10 00:35:02,657 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-10 00:35:02,658 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-10 00:35:02,658 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-10 00:35:02,658 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-10 00:35:02,660 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:34:41" (3/4) ... [2025-01-10 00:35:02,661 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-10 00:35:02,662 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-10 00:35:02,663 INFO L158 Benchmark]: Toolchain (without parser) took 22542.81ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 110.1MB in the beginning and 171.9MB in the end (delta: -61.8MB). Peak memory consumption was 63.3MB. Max. memory is 16.1GB. [2025-01-10 00:35:02,663 INFO L158 Benchmark]: CDTParser took 0.94ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:02,663 INFO L158 Benchmark]: CACSL2BoogieTranslator took 532.76ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 78.3MB in the end (delta: 31.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-01-10 00:35:02,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.03ms. Allocated memory is still 142.6MB. Free memory was 78.3MB in the beginning and 76.0MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:02,664 INFO L158 Benchmark]: Boogie Preprocessor took 35.67ms. Allocated memory is still 142.6MB. Free memory was 76.0MB in the beginning and 74.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:02,664 INFO L158 Benchmark]: RCFGBuilder took 442.98ms. Allocated memory is still 142.6MB. Free memory was 74.1MB in the beginning and 50.9MB in the end (delta: 23.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-01-10 00:35:02,664 INFO L158 Benchmark]: TraceAbstraction took 21484.66ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 50.4MB in the beginning and 171.9MB in the end (delta: -121.5MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. [2025-01-10 00:35:02,664 INFO L158 Benchmark]: Witness Printer took 4.17ms. Allocated memory is still 268.4MB. Free memory was 171.9MB in the beginning and 171.9MB in the end (delta: 35.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:02,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.94ms. Allocated memory is still 201.3MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 532.76ms. Allocated memory is still 142.6MB. Free memory was 110.1MB in the beginning and 78.3MB in the end (delta: 31.8MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.03ms. Allocated memory is still 142.6MB. Free memory was 78.3MB in the beginning and 76.0MB in the end (delta: 2.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.67ms. Allocated memory is still 142.6MB. Free memory was 76.0MB in the beginning and 74.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 442.98ms. Allocated memory is still 142.6MB. Free memory was 74.1MB in the beginning and 50.9MB in the end (delta: 23.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 21484.66ms. Allocated memory was 142.6MB in the beginning and 268.4MB in the end (delta: 125.8MB). Free memory was 50.4MB in the beginning and 171.9MB in the end (delta: -121.5MB). Peak memory consumption was 4.6MB. Max. memory is 16.1GB. * Witness Printer took 4.17ms. Allocated memory is still 268.4MB. Free memory was 171.9MB in the beginning and 171.9MB in the end (delta: 35.2kB). 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: 21.3s, OverallIterations: 19, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2743 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2436 mSDsluCounter, 1795 SdHoareTripleChecker+Invalid, 5.1s 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, 9.1s 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, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-01-10 00:35:02,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with 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/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/bigshot_s2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 0.3.0-?-551b009-m [2025-01-10 00:35:04,928 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:35:05,031 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-01-10 00:35:05,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:35:05,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:35:05,075 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:35:05,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:35:05,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:35:05,078 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:35:05,078 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:35:05,078 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:35:05,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:35:05,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:35:05,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:35:05,079 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:35:05,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:35:05,080 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:35:05,081 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:35:05,082 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:35:05,082 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:35:05,082 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:35:05,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:35:05,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:35:05,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:35:05,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:35:05,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:35:05,084 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-01-10 00:35:05,084 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-01-10 00:35:05,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:35:05,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:35:05,085 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:35:05,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:35:05,085 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 [2025-01-10 00:35:05,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:35:05,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:35:05,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:35:05,397 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:35:05,397 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:35:05,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s2.i [2025-01-10 00:35:06,754 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/106bc0420/ab697240bad143c497010e03b136ab37/FLAG97edb2934 [2025-01-10 00:35:07,080 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:35:07,082 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s2.i [2025-01-10 00:35:07,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/106bc0420/ab697240bad143c497010e03b136ab37/FLAG97edb2934 [2025-01-10 00:35:07,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/106bc0420/ab697240bad143c497010e03b136ab37 [2025-01-10 00:35:07,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:35:07,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:35:07,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:35:07,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:35:07,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:35:07,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2917c521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07, skipping insertion in model container [2025-01-10 00:35:07,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,177 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:35:07,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:35:07,724 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 00:35:07,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:35:07,861 INFO L204 MainTranslator]: Completed translation [2025-01-10 00:35:07,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07 WrapperNode [2025-01-10 00:35:07,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:35:07,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 00:35:07,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 00:35:07,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 00:35:07,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,888 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,911 INFO L138 Inliner]: procedures = 323, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2025-01-10 00:35:07,912 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 00:35:07,912 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 00:35:07,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 00:35:07,914 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 00:35:07,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,945 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 2, 9]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8]. The 1 writes are split as follows [0, 1, 0]. [2025-01-10 00:35:07,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,952 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 00:35:07,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 00:35:07,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 00:35:07,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 00:35:07,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (1/1) ... [2025-01-10 00:35:07,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:35:07,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:07,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 00:35:07,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 00:35:08,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 00:35:08,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 00:35:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#2 [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 00:35:08,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 00:35:08,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 00:35:08,019 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 00:35:08,140 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 00:35:08,142 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 00:35:08,391 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 00:35:08,391 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 00:35:08,565 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 00:35:08,565 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-01-10 00:35:08,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:08 BoogieIcfgContainer [2025-01-10 00:35:08,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 00:35:08,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 00:35:08,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 00:35:08,573 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 00:35:08,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:35:07" (1/3) ... [2025-01-10 00:35:08,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d433d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:35:08, skipping insertion in model container [2025-01-10 00:35:08,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:35:07" (2/3) ... [2025-01-10 00:35:08,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d433d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:35:08, skipping insertion in model container [2025-01-10 00:35:08,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:08" (3/3) ... [2025-01-10 00:35:08,578 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2025-01-10 00:35:08,590 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 00:35:08,591 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.i that has 3 procedures, 39 locations, 1 initial locations, 1 loop locations, and 10 error locations. [2025-01-10 00:35:08,591 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 00:35:08,651 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-01-10 00:35:08,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2025-01-10 00:35:08,721 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2025-01-10 00:35:08,723 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:35:08,726 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. [2025-01-10 00:35:08,727 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2025-01-10 00:35:08,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2025-01-10 00:35:08,738 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 00:35:08,747 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;@5dae1cc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 00:35:08,747 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-01-10 00:35:08,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 00:35:08,753 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-01-10 00:35:08,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:35:08,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:08,755 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:08,755 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:08,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1089432420, now seen corresponding path program 1 times [2025-01-10 00:35:08,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:08,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406190956] [2025-01-10 00:35:08,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:08,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:08,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:08,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:08,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 00:35:08,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:35:08,882 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:35:08,883 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:08,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:08,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 00:35:08,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:08,975 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-01-10 00:35:08,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2025-01-10 00:35:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:09,017 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:09,018 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:09,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406190956] [2025-01-10 00:35:09,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406190956] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:09,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:35:09,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938331102] [2025-01-10 00:35:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:09,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:35:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:09,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:35:09,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:35:09,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-01-10 00:35:09,107 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) [2025-01-10 00:35:09,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:09,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-01-10 00:35:09,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:09,183 INFO L124 PetriNetUnfolderBase]: 8/54 cut-off events. [2025-01-10 00:35:09,184 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:35:09,184 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. [2025-01-10 00:35:09,186 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 15 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2025-01-10 00:35:09,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 118 flow [2025-01-10 00:35:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:35:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:35:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-01-10 00:35:09,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-01-10 00:35:09,202 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 99 transitions. [2025-01-10 00:35:09,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 118 flow [2025-01-10 00:35:09,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 110 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:35:09,209 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2025-01-10 00:35:09,212 INFO L262 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} [2025-01-10 00:35:09,216 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-01-10 00:35:09,217 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2025-01-10 00:35:09,217 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) [2025-01-10 00:35:09,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:09,218 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:09,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 00:35:09,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:09,419 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:09,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash -587333092, now seen corresponding path program 1 times [2025-01-10 00:35:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:09,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005965297] [2025-01-10 00:35:09,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:09,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:09,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:09,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:09,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 00:35:09,479 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:35:09,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:35:09,493 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:09,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:09,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 00:35:09,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 00:35:09,556 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 [2025-01-10 00:35:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:09,634 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:09,635 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:09,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005965297] [2025-01-10 00:35:09,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005965297] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:09,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:09,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:35:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376405467] [2025-01-10 00:35:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:09,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:35:09,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:09,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:35:09,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:35:09,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:35:09,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2025-01-10 00:35:09,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:09,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:35:09,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:09,822 INFO L124 PetriNetUnfolderBase]: 16/80 cut-off events. [2025-01-10 00:35:09,823 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 00:35:09,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 80 events. 16/80 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 7 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 60. Up to 39 conditions per place. [2025-01-10 00:35:09,824 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-01-10 00:35:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 140 flow [2025-01-10 00:35:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:35:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:35:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2025-01-10 00:35:09,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5755813953488372 [2025-01-10 00:35:09,827 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 99 transitions. [2025-01-10 00:35:09,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 140 flow [2025-01-10 00:35:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:35:09,829 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2025-01-10 00:35:09,829 INFO L262 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} [2025-01-10 00:35:09,831 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-01-10 00:35:09,832 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2025-01-10 00:35:09,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2025-01-10 00:35:09,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:09,832 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:09,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 00:35:10,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,033 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:10,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1027456410, now seen corresponding path program 1 times [2025-01-10 00:35:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:10,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119920478] [2025-01-10 00:35:10,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:10,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:10,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 00:35:10,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-01-10 00:35:10,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-01-10 00:35:10,108 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:10,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:10,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 00:35:10,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:10,117 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 [2025-01-10 00:35:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:10,148 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:10,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119920478] [2025-01-10 00:35:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119920478] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:10,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:35:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31837485] [2025-01-10 00:35:10,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:10,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:35:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:10,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:35:10,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:35:10,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:35:10,195 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) [2025-01-10 00:35:10,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:10,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:35:10,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:10,269 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2025-01-10 00:35:10,269 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-01-10 00:35:10,270 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. [2025-01-10 00:35:10,270 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-01-10 00:35:10,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2025-01-10 00:35:10,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:35:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:35:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2025-01-10 00:35:10,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2025-01-10 00:35:10,272 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2025-01-10 00:35:10,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2025-01-10 00:35:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:35:10,274 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2025-01-10 00:35:10,274 INFO L262 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} [2025-01-10 00:35:10,274 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2025-01-10 00:35:10,274 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2025-01-10 00:35:10,275 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) [2025-01-10 00:35:10,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:10,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:10,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 00:35:10,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,476 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:10,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:10,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1787433129, now seen corresponding path program 1 times [2025-01-10 00:35:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616650708] [2025-01-10 00:35:10,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:10,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:10,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:10,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 00:35:10,537 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 00:35:10,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 00:35:10,548 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:10,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:10,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-01-10 00:35:10,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:10,568 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:10,568 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:10,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616650708] [2025-01-10 00:35:10,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616650708] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:10,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:10,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:35:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41305995] [2025-01-10 00:35:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:10,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:35:10,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:10,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:35:10,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:35:10,579 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:35:10,579 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) [2025-01-10 00:35:10,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:10,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:35:10,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:10,635 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2025-01-10 00:35:10,636 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-01-10 00:35:10,636 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 131 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. [2025-01-10 00:35:10,636 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2025-01-10 00:35:10,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2025-01-10 00:35:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:35:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:35:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2025-01-10 00:35:10,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2025-01-10 00:35:10,638 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2025-01-10 00:35:10,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2025-01-10 00:35:10,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:35:10,640 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2025-01-10 00:35:10,642 INFO L262 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} [2025-01-10 00:35:10,642 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2025-01-10 00:35:10,643 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2025-01-10 00:35:10,643 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) [2025-01-10 00:35:10,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:10,643 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:10,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 00:35:10,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,844 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:10,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1786377378, now seen corresponding path program 1 times [2025-01-10 00:35:10,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:10,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768966221] [2025-01-10 00:35:10,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:10,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:10,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:10,847 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:10,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 00:35:10,901 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-01-10 00:35:10,914 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-01-10 00:35:10,914 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:10,914 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:10,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-10 00:35:10,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:10,926 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 [2025-01-10 00:35:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:11,016 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:11,016 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768966221] [2025-01-10 00:35:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768966221] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:11,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:11,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:35:11,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435173169] [2025-01-10 00:35:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:11,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:35:11,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:11,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:35:11,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:35:11,067 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2025-01-10 00:35:11,067 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) [2025-01-10 00:35:11,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:11,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2025-01-10 00:35:11,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:11,170 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2025-01-10 00:35:11,170 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 00:35:11,171 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 106 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. [2025-01-10 00:35:11,171 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2025-01-10 00:35:11,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2025-01-10 00:35:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:35:11,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:35:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2025-01-10 00:35:11,173 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2025-01-10 00:35:11,173 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2025-01-10 00:35:11,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2025-01-10 00:35:11,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:35:11,174 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2025-01-10 00:35:11,174 INFO L262 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} [2025-01-10 00:35:11,175 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2025-01-10 00:35:11,175 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2025-01-10 00:35:11,175 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) [2025-01-10 00:35:11,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:11,175 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:11,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 00:35:11,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:11,377 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:11,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash 53525603, now seen corresponding path program 1 times [2025-01-10 00:35:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:11,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696938907] [2025-01-10 00:35:11,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:11,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:11,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:11,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:11,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 00:35:11,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 00:35:11,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 00:35:11,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:11,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:11,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 00:35:11,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:11,478 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 00:35:11,479 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 [2025-01-10 00:35:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:11,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:11,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:11,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696938907] [2025-01-10 00:35:11,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696938907] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:11,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:11,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-01-10 00:35:11,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235302632] [2025-01-10 00:35:11,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:11,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:35:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:11,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:35:11,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:35:12,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:35:12,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 10 states, 10 states have (on average 20.4) internal successors, (204), 10 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 00:35:12,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:12,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:35:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:12,627 INFO L124 PetriNetUnfolderBase]: 25/114 cut-off events. [2025-01-10 00:35:12,628 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-01-10 00:35:12,628 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, 3 based on Foata normal form. 12/124 useless extension candidates. Maximal degree in co-relation 209. Up to 26 conditions per place. [2025-01-10 00:35:12,630 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 25 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2025-01-10 00:35:12,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 210 flow [2025-01-10 00:35:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 00:35:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 00:35:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2025-01-10 00:35:12,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5322997416020672 [2025-01-10 00:35:12,634 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 9 states and 206 transitions. [2025-01-10 00:35:12,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 210 flow [2025-01-10 00:35:12,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:35:12,638 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 139 flow [2025-01-10 00:35:12,638 INFO L262 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=139, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2025-01-10 00:35:12,639 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2025-01-10 00:35:12,640 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 139 flow [2025-01-10 00:35:12,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.4) internal successors, (204), 10 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 00:35:12,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:12,641 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:12,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 00:35:12,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:12,841 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:12,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash -101494811, now seen corresponding path program 1 times [2025-01-10 00:35:12,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:12,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434268965] [2025-01-10 00:35:12,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:12,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:12,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:12,845 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 00:35:12,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:35:12,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:35:12,918 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:12,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:12,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 00:35:12,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:12,931 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 [2025-01-10 00:35:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:13,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:13,163 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:13,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434268965] [2025-01-10 00:35:13,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434268965] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:13,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:13,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-01-10 00:35:13,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315788294] [2025-01-10 00:35:13,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:13,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 00:35:13,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:13,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 00:35:13,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 00:35:13,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2025-01-10 00:35:13,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 139 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) [2025-01-10 00:35:13,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:13,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2025-01-10 00:35:13,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:13,563 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2025-01-10 00:35:13,563 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-01-10 00:35:13,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 111 events. 25/111 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 176 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 227. Up to 29 conditions per place. [2025-01-10 00:35:13,564 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-01-10 00:35:13,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 237 flow [2025-01-10 00:35:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 00:35:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 00:35:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2025-01-10 00:35:13,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2025-01-10 00:35:13,566 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 139 flow. Second operand 7 states and 166 transitions. [2025-01-10 00:35:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 237 flow [2025-01-10 00:35:13,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 48 transitions, 214 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-01-10 00:35:13,569 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 166 flow [2025-01-10 00:35:13,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=166, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2025-01-10 00:35:13,569 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2025-01-10 00:35:13,569 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 166 flow [2025-01-10 00:35:13,570 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) [2025-01-10 00:35:13,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:13,570 INFO L206 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] [2025-01-10 00:35:13,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 00:35:13,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:13,771 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:13,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1462115297, now seen corresponding path program 1 times [2025-01-10 00:35:13,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:13,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939931149] [2025-01-10 00:35:13,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:13,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:13,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:13,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 00:35:13,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-01-10 00:35:13,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-01-10 00:35:13,839 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:13,839 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:13,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 00:35:13,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:13,925 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 [2025-01-10 00:35:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:13,933 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:35:13,933 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939931149] [2025-01-10 00:35:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939931149] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:35:13,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:35:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 00:35:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323895131] [2025-01-10 00:35:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:35:13,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:35:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:13,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:35:13,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:35:13,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2025-01-10 00:35:13,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 166 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) [2025-01-10 00:35:13,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:13,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2025-01-10 00:35:13,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:14,072 INFO L124 PetriNetUnfolderBase]: 21/109 cut-off events. [2025-01-10 00:35:14,072 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2025-01-10 00:35:14,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 109 events. 21/109 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 175 event pairs, 12 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 244. Up to 51 conditions per place. [2025-01-10 00:35:14,073 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2025-01-10 00:35:14,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 41 transitions, 223 flow [2025-01-10 00:35:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:35:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:35:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2025-01-10 00:35:14,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.562015503875969 [2025-01-10 00:35:14,074 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 166 flow. Second operand 6 states and 145 transitions. [2025-01-10 00:35:14,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 41 transitions, 223 flow [2025-01-10 00:35:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 41 transitions, 210 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 00:35:14,077 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 164 flow [2025-01-10 00:35:14,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=164, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2025-01-10 00:35:14,078 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2025-01-10 00:35:14,078 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 164 flow [2025-01-10 00:35:14,078 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) [2025-01-10 00:35:14,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:14,078 INFO L206 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] [2025-01-10 00:35:14,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 00:35:14,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:14,282 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:14,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1402395310, now seen corresponding path program 1 times [2025-01-10 00:35:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779481574] [2025-01-10 00:35:14,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:35:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:14,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:14,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 00:35:14,338 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 00:35:14,361 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 00:35:14,361 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:14,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:14,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-10 00:35:14,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:14,388 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 [2025-01-10 00:35:14,699 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 [2025-01-10 00:35:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:14,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:14,982 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:14,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779481574] [2025-01-10 00:35:14,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779481574] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:14,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:14,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-01-10 00:35:14,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863603177] [2025-01-10 00:35:14,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:14,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 00:35:14,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:14,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 00:35:14,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-01-10 00:35:15,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:15,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 164 flow. Second operand has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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) [2025-01-10 00:35:15,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:15,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:15,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:15,740 INFO L124 PetriNetUnfolderBase]: 23/109 cut-off events. [2025-01-10 00:35:15,740 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2025-01-10 00:35:15,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 109 events. 23/109 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 172 event pairs, 6 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 258. Up to 31 conditions per place. [2025-01-10 00:35:15,741 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 27 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2025-01-10 00:35:15,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 262 flow [2025-01-10 00:35:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 00:35:15,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 00:35:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2025-01-10 00:35:15,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2025-01-10 00:35:15,743 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 164 flow. Second operand 10 states and 206 transitions. [2025-01-10 00:35:15,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 262 flow [2025-01-10 00:35:15,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 259 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:35:15,745 INFO L231 Difference]: Finished difference. Result has 59 places, 38 transitions, 183 flow [2025-01-10 00:35:15,746 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=38} [2025-01-10 00:35:15,746 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2025-01-10 00:35:15,746 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 38 transitions, 183 flow [2025-01-10 00:35:15,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.5) internal successors, (273), 14 states have internal predecessors, (273), 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) [2025-01-10 00:35:15,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:15,747 INFO L206 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] [2025-01-10 00:35:15,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 00:35:15,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:15,947 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:15,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1063418841, now seen corresponding path program 2 times [2025-01-10 00:35:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:15,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156032190] [2025-01-10 00:35:15,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:35:15,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:15,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:15,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 00:35:15,998 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:35:16,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:35:16,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:35:16,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:16,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 00:35:16,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:16,049 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 [2025-01-10 00:35:16,475 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 [2025-01-10 00:35:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:16,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:16,835 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:16,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156032190] [2025-01-10 00:35:16,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156032190] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:16,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:16,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-01-10 00:35:16,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072781387] [2025-01-10 00:35:16,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:16,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 00:35:16,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:16,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 00:35:16,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-01-10 00:35:17,475 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 38 transitions, 183 flow. Second operand has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 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) [2025-01-10 00:35:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:17,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:17,940 INFO L124 PetriNetUnfolderBase]: 21/107 cut-off events. [2025-01-10 00:35:17,940 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-01-10 00:35:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 107 events. 21/107 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 4 based on Foata normal form. 2/107 useless extension candidates. Maximal degree in co-relation 270. Up to 25 conditions per place. [2025-01-10 00:35:17,941 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 28 selfloop transitions, 12 changer transitions 0/50 dead transitions. [2025-01-10 00:35:17,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 50 transitions, 291 flow [2025-01-10 00:35:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 00:35:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 00:35:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2025-01-10 00:35:17,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4748062015503876 [2025-01-10 00:35:17,943 INFO L175 Difference]: Start difference. First operand has 59 places, 38 transitions, 183 flow. Second operand 12 states and 245 transitions. [2025-01-10 00:35:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 50 transitions, 291 flow [2025-01-10 00:35:17,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 50 transitions, 261 flow, removed 6 selfloop flow, removed 9 redundant places. [2025-01-10 00:35:17,945 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 179 flow [2025-01-10 00:35:17,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=179, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2025-01-10 00:35:17,946 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2025-01-10 00:35:17,946 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 179 flow [2025-01-10 00:35:17,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.5625) internal successors, (313), 16 states have internal predecessors, (313), 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) [2025-01-10 00:35:17,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:17,947 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:17,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 00:35:18,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:18,148 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:18,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2046409800, now seen corresponding path program 2 times [2025-01-10 00:35:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437395110] [2025-01-10 00:35:18,149 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:35:18,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:18,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:18,151 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:18,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 00:35:18,207 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-01-10 00:35:18,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-01-10 00:35:18,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:35:18,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:18,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-10 00:35:18,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:18,262 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 00:35:18,262 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 [2025-01-10 00:35:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:18,723 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:19,511 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:19,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437395110] [2025-01-10 00:35:19,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437395110] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:19,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:19,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-01-10 00:35:19,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137996378] [2025-01-10 00:35:19,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:19,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 00:35:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:19,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 00:35:19,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-01-10 00:35:20,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2025-01-10 00:35:20,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 179 flow. Second operand has 19 states, 19 states have (on average 17.63157894736842) internal successors, (335), 19 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) [2025-01-10 00:35:20,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:20,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2025-01-10 00:35:20,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:21,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-01-10 00:35:22,516 INFO L124 PetriNetUnfolderBase]: 68/239 cut-off events. [2025-01-10 00:35:22,516 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2025-01-10 00:35:22,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 239 events. 68/239 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 3 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 727. Up to 50 conditions per place. [2025-01-10 00:35:22,518 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 58 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2025-01-10 00:35:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 652 flow [2025-01-10 00:35:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-10 00:35:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-01-10 00:35:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 360 transitions. [2025-01-10 00:35:22,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2025-01-10 00:35:22,520 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 179 flow. Second operand 18 states and 360 transitions. [2025-01-10 00:35:22,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 652 flow [2025-01-10 00:35:22,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 600 flow, removed 0 selfloop flow, removed 9 redundant places. [2025-01-10 00:35:22,526 INFO L231 Difference]: Finished difference. Result has 78 places, 57 transitions, 414 flow [2025-01-10 00:35:22,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=414, PETRI_PLACES=78, PETRI_TRANSITIONS=57} [2025-01-10 00:35:22,527 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2025-01-10 00:35:22,528 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 57 transitions, 414 flow [2025-01-10 00:35:22,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.63157894736842) internal successors, (335), 19 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) [2025-01-10 00:35:22,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:22,528 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:22,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 00:35:22,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:22,729 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:22,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 495212026, now seen corresponding path program 2 times [2025-01-10 00:35:22,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:22,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035962902] [2025-01-10 00:35:22,730 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:35:22,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:22,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:22,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:22,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-10 00:35:22,782 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-01-10 00:35:22,794 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-01-10 00:35:22,794 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 00:35:22,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:22,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 00:35:22,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:22,824 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-01-10 00:35:22,824 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 [2025-01-10 00:35:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-10 00:35:23,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-01-10 00:35:23,452 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035962902] [2025-01-10 00:35:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035962902] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:23,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:23,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-01-10 00:35:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452501936] [2025-01-10 00:35:23,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:23,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:35:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:23,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:35:23,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:35:24,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:24,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 57 transitions, 414 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) [2025-01-10 00:35:24,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:24,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:24,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:24,423 INFO L124 PetriNetUnfolderBase]: 60/222 cut-off events. [2025-01-10 00:35:24,423 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-01-10 00:35:24,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 773 conditions, 222 events. 60/222 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 311 event pairs, 2 based on Foata normal form. 12/234 useless extension candidates. Maximal degree in co-relation 732. Up to 95 conditions per place. [2025-01-10 00:35:24,426 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 24 selfloop transitions, 24 changer transitions 0/58 dead transitions. [2025-01-10 00:35:24,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 58 transitions, 488 flow [2025-01-10 00:35:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:35:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:35:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2025-01-10 00:35:24,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2025-01-10 00:35:24,428 INFO L175 Difference]: Start difference. First operand has 78 places, 57 transitions, 414 flow. Second operand 6 states and 126 transitions. [2025-01-10 00:35:24,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 58 transitions, 488 flow [2025-01-10 00:35:24,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 461 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 00:35:24,433 INFO L231 Difference]: Finished difference. Result has 74 places, 55 transitions, 423 flow [2025-01-10 00:35:24,433 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2025-01-10 00:35:24,435 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2025-01-10 00:35:24,435 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 423 flow [2025-01-10 00:35:24,435 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) [2025-01-10 00:35:24,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:24,435 INFO L206 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] [2025-01-10 00:35:24,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 00:35:24,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:24,636 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:24,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:24,637 INFO L85 PathProgramCache]: Analyzing trace with hash -241182796, now seen corresponding path program 3 times [2025-01-10 00:35:24,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:24,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672466565] [2025-01-10 00:35:24,637 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:35:24,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:24,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:24,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:24,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 00:35:24,705 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 41 statements into 4 equivalence classes. [2025-01-10 00:35:24,749 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 41 of 41 statements. [2025-01-10 00:35:24,749 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-01-10 00:35:24,749 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:24,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 00:35:24,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:24,769 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 [2025-01-10 00:35:25,240 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 [2025-01-10 00:35:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:25,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:25,663 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672466565] [2025-01-10 00:35:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672466565] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:25,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:25,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-01-10 00:35:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753863347] [2025-01-10 00:35:25,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:25,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 00:35:25,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:25,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 00:35:25,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-01-10 00:35:26,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:26,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 55 transitions, 423 flow. Second operand has 18 states, 18 states have (on average 19.555555555555557) internal successors, (352), 18 states have internal predecessors, (352), 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) [2025-01-10 00:35:26,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:26,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:26,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:26,991 INFO L124 PetriNetUnfolderBase]: 54/214 cut-off events. [2025-01-10 00:35:26,991 INFO L125 PetriNetUnfolderBase]: For 800/800 co-relation queries the response was YES. [2025-01-10 00:35:26,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 214 events. 54/214 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 297 event pairs, 14 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 738. Up to 63 conditions per place. [2025-01-10 00:35:26,993 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 37 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2025-01-10 00:35:26,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 566 flow [2025-01-10 00:35:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 00:35:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 00:35:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 265 transitions. [2025-01-10 00:35:26,995 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4740608228980322 [2025-01-10 00:35:26,995 INFO L175 Difference]: Start difference. First operand has 74 places, 55 transitions, 423 flow. Second operand 13 states and 265 transitions. [2025-01-10 00:35:26,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 566 flow [2025-01-10 00:35:27,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 69 transitions, 534 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 00:35:27,002 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 423 flow [2025-01-10 00:35:27,002 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=423, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2025-01-10 00:35:27,003 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2025-01-10 00:35:27,003 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 423 flow [2025-01-10 00:35:27,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.555555555555557) internal successors, (352), 18 states have internal predecessors, (352), 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) [2025-01-10 00:35:27,004 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:27,004 INFO L206 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] [2025-01-10 00:35:27,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-10 00:35:27,204 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:27,204 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:27,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash -508734169, now seen corresponding path program 4 times [2025-01-10 00:35:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:27,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432458938] [2025-01-10 00:35:27,205 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 00:35:27,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:27,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:27,207 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:27,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-10 00:35:27,263 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 47 statements into 2 equivalence classes. [2025-01-10 00:35:27,300 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 00:35:27,300 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-10 00:35:27,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:27,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-10 00:35:27,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:27,318 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 [2025-01-10 00:35:27,886 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 [2025-01-10 00:35:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:27,898 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:28,426 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:28,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432458938] [2025-01-10 00:35:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432458938] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:28,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2025-01-10 00:35:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83825505] [2025-01-10 00:35:28,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:28,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 00:35:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:28,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 00:35:28,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2025-01-10 00:35:29,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:29,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 423 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) [2025-01-10 00:35:29,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:29,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:29,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:31,280 INFO L124 PetriNetUnfolderBase]: 48/214 cut-off events. [2025-01-10 00:35:31,280 INFO L125 PetriNetUnfolderBase]: For 731/731 co-relation queries the response was YES. [2025-01-10 00:35:31,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 214 events. 48/214 cut-off events. For 731/731 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 292 event pairs, 4 based on Foata normal form. 6/220 useless extension candidates. Maximal degree in co-relation 752. Up to 40 conditions per place. [2025-01-10 00:35:31,282 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 27 changer transitions 0/90 dead transitions. [2025-01-10 00:35:31,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 90 transitions, 721 flow [2025-01-10 00:35:31,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-10 00:35:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-01-10 00:35:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 487 transitions. [2025-01-10 00:35:31,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47189922480620156 [2025-01-10 00:35:31,284 INFO L175 Difference]: Start difference. First operand has 83 places, 55 transitions, 423 flow. Second operand 24 states and 487 transitions. [2025-01-10 00:35:31,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 90 transitions, 721 flow [2025-01-10 00:35:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 90 transitions, 671 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-01-10 00:35:31,290 INFO L231 Difference]: Finished difference. Result has 99 places, 60 transitions, 482 flow [2025-01-10 00:35:31,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=482, PETRI_PLACES=99, PETRI_TRANSITIONS=60} [2025-01-10 00:35:31,290 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2025-01-10 00:35:31,290 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 60 transitions, 482 flow [2025-01-10 00:35:31,291 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) [2025-01-10 00:35:31,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:31,291 INFO L206 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] [2025-01-10 00:35:31,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 00:35:31,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:31,492 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:31,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2060058242, now seen corresponding path program 5 times [2025-01-10 00:35:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:31,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910148458] [2025-01-10 00:35:31,493 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 00:35:31,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:31,495 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:31,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 00:35:31,550 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 53 statements into 6 equivalence classes. [2025-01-10 00:35:31,645 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 53 of 53 statements. [2025-01-10 00:35:31,645 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-01-10 00:35:31,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:31,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 00:35:31,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:31,666 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 [2025-01-10 00:35:32,343 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 [2025-01-10 00:35:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:32,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:32,902 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910148458] [2025-01-10 00:35:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910148458] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:32,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:32,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-01-10 00:35:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707511308] [2025-01-10 00:35:32,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:32,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-10 00:35:32,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:32,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-10 00:35:32,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-01-10 00:35:34,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:34,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 60 transitions, 482 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) [2025-01-10 00:35:34,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:34,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:34,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:36,314 INFO L124 PetriNetUnfolderBase]: 51/243 cut-off events. [2025-01-10 00:35:36,314 INFO L125 PetriNetUnfolderBase]: For 1108/1108 co-relation queries the response was YES. [2025-01-10 00:35:36,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 243 events. 51/243 cut-off events. For 1108/1108 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 330 event pairs, 4 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 906. Up to 45 conditions per place. [2025-01-10 00:35:36,316 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 54 selfloop transitions, 30 changer transitions 0/98 dead transitions. [2025-01-10 00:35:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 98 transitions, 832 flow [2025-01-10 00:35:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-10 00:35:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-01-10 00:35:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 563 transitions. [2025-01-10 00:35:36,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4676079734219269 [2025-01-10 00:35:36,318 INFO L175 Difference]: Start difference. First operand has 99 places, 60 transitions, 482 flow. Second operand 28 states and 563 transitions. [2025-01-10 00:35:36,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 98 transitions, 832 flow [2025-01-10 00:35:36,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 98 transitions, 795 flow, removed 2 selfloop flow, removed 16 redundant places. [2025-01-10 00:35:36,325 INFO L231 Difference]: Finished difference. Result has 116 places, 64 transitions, 579 flow [2025-01-10 00:35:36,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=64} [2025-01-10 00:35:36,325 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2025-01-10 00:35:36,325 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 64 transitions, 579 flow [2025-01-10 00:35:36,326 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) [2025-01-10 00:35:36,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:36,326 INFO L206 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] [2025-01-10 00:35:36,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 00:35:36,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:36,527 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:36,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash -501616631, now seen corresponding path program 6 times [2025-01-10 00:35:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:36,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985775062] [2025-01-10 00:35:36,527 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 00:35:36,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:36,530 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:36,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 00:35:36,582 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 59 statements into 7 equivalence classes. [2025-01-10 00:35:36,660 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 59 of 59 statements. [2025-01-10 00:35:36,660 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-01-10 00:35:36,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:36,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 00:35:36,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:36,679 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 [2025-01-10 00:35:37,398 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 [2025-01-10 00:35:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:37,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:35:38,056 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:38,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985775062] [2025-01-10 00:35:38,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985775062] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:38,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:38,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-01-10 00:35:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180036182] [2025-01-10 00:35:38,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:38,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 00:35:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:38,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 00:35:38,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-01-10 00:35:39,344 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2025-01-10 00:35:39,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 64 transitions, 579 flow. Second operand has 24 states, 24 states have (on average 19.666666666666668) internal successors, (472), 24 states have internal predecessors, (472), 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) [2025-01-10 00:35:39,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:39,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2025-01-10 00:35:39,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:42,091 INFO L124 PetriNetUnfolderBase]: 54/272 cut-off events. [2025-01-10 00:35:42,091 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2025-01-10 00:35:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1156 conditions, 272 events. 54/272 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 368 event pairs, 4 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1100. Up to 50 conditions per place. [2025-01-10 00:35:42,093 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 59 selfloop transitions, 33 changer transitions 0/106 dead transitions. [2025-01-10 00:35:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 106 transitions, 983 flow [2025-01-10 00:35:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-01-10 00:35:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-01-10 00:35:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 639 transitions. [2025-01-10 00:35:42,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4643895348837209 [2025-01-10 00:35:42,096 INFO L175 Difference]: Start difference. First operand has 116 places, 64 transitions, 579 flow. Second operand 32 states and 639 transitions. [2025-01-10 00:35:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 106 transitions, 983 flow [2025-01-10 00:35:42,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 106 transitions, 929 flow, removed 6 selfloop flow, removed 21 redundant places. [2025-01-10 00:35:42,104 INFO L231 Difference]: Finished difference. Result has 132 places, 68 transitions, 682 flow [2025-01-10 00:35:42,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=682, PETRI_PLACES=132, PETRI_TRANSITIONS=68} [2025-01-10 00:35:42,105 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2025-01-10 00:35:42,105 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 68 transitions, 682 flow [2025-01-10 00:35:42,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.666666666666668) internal successors, (472), 24 states have internal predecessors, (472), 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) [2025-01-10 00:35:42,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:42,106 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:42,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 00:35:42,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:42,306 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:42,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1745514836, now seen corresponding path program 3 times [2025-01-10 00:35:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:42,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620137906] [2025-01-10 00:35:42,307 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:35:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:42,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:42,309 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:42,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 00:35:42,358 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-01-10 00:35:42,372 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-01-10 00:35:42,372 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-10 00:35:42,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:35:42,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-10 00:35:42,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:35:42,409 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:35:42,409 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 13 treesize of output 13 [2025-01-10 00:35:42,416 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 12 treesize of output 14 [2025-01-10 00:35:43,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:35:43,341 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 [2025-01-10 00:35:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-10 00:35:43,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:35:48,610 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-10 00:35:48,610 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:35:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620137906] [2025-01-10 00:35:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620137906] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:35:48,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:35:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-01-10 00:35:48,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661498994] [2025-01-10 00:35:48,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:35:48,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 00:35:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:35:48,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 00:35:48,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=145, Unknown=1, NotChecked=0, Total=182 [2025-01-10 00:35:49,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2025-01-10 00:35:49,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 68 transitions, 682 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2025-01-10 00:35:49,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:35:49,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2025-01-10 00:35:49,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:35:50,399 INFO L124 PetriNetUnfolderBase]: 84/290 cut-off events. [2025-01-10 00:35:50,400 INFO L125 PetriNetUnfolderBase]: For 1748/1748 co-relation queries the response was YES. [2025-01-10 00:35:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 290 events. 84/290 cut-off events. For 1748/1748 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 337 event pairs, 2 based on Foata normal form. 12/302 useless extension candidates. Maximal degree in co-relation 1208. Up to 170 conditions per place. [2025-01-10 00:35:50,402 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 34 selfloop transitions, 32 changer transitions 0/72 dead transitions. [2025-01-10 00:35:50,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 72 transitions, 802 flow [2025-01-10 00:35:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-10 00:35:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-01-10 00:35:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2025-01-10 00:35:50,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2025-01-10 00:35:50,413 INFO L175 Difference]: Start difference. First operand has 132 places, 68 transitions, 682 flow. Second operand 7 states and 129 transitions. [2025-01-10 00:35:50,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 72 transitions, 802 flow [2025-01-10 00:35:50,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 72 transitions, 716 flow, removed 10 selfloop flow, removed 29 redundant places. [2025-01-10 00:35:50,426 INFO L231 Difference]: Finished difference. Result has 107 places, 66 transitions, 634 flow [2025-01-10 00:35:50,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=634, PETRI_PLACES=107, PETRI_TRANSITIONS=66} [2025-01-10 00:35:50,427 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2025-01-10 00:35:50,427 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 66 transitions, 634 flow [2025-01-10 00:35:50,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2025-01-10 00:35:50,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:35:50,427 INFO L206 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] [2025-01-10 00:35:50,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-10 00:35:50,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:50,628 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-01-10 00:35:50,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:35:50,629 INFO L85 PathProgramCache]: Analyzing trace with hash -178626480, now seen corresponding path program 7 times [2025-01-10 00:35:50,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:35:50,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333391193] [2025-01-10 00:35:50,629 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 00:35:50,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:35:50,631 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:35:50,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-10 00:35:50,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-10 00:35:50,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-10 00:35:50,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:50,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 00:35:50,819 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-10 00:35:50,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 65 statements into 1 equivalence classes. [2025-01-10 00:35:51,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 65 of 65 statements. [2025-01-10 00:35:51,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:35:51,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-10 00:35:51,581 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-01-10 00:35:51,581 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-10 00:35:51,582 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (17 of 18 remaining) [2025-01-10 00:35:51,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2025-01-10 00:35:51,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2025-01-10 00:35:51,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (8 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2025-01-10 00:35:51,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2025-01-10 00:35:51,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-01-10 00:35:51,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:35:51,785 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 00:35:51,853 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-10 00:35:51,855 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-10 00:35:51,860 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 12:35:51 BasicIcfg [2025-01-10 00:35:51,861 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-10 00:35:51,861 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-10 00:35:51,861 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-10 00:35:51,861 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-10 00:35:51,862 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:35:08" (3/4) ... [2025-01-10 00:35:51,864 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-01-10 00:35:51,864 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-10 00:35:51,865 INFO L158 Benchmark]: Toolchain (without parser) took 44737.35ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 90.1MB in the beginning and 114.6MB in the end (delta: -24.6MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2025-01-10 00:35:51,865 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:51,865 INFO L158 Benchmark]: CACSL2BoogieTranslator took 732.18ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 57.2MB in the end (delta: 32.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2025-01-10 00:35:51,866 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.27ms. Allocated memory is still 117.4MB. Free memory was 57.2MB in the beginning and 54.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:51,866 INFO L158 Benchmark]: Boogie Preprocessor took 48.40ms. Allocated memory is still 117.4MB. Free memory was 54.6MB in the beginning and 52.3MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-01-10 00:35:51,866 INFO L158 Benchmark]: RCFGBuilder took 600.44ms. Allocated memory is still 117.4MB. Free memory was 52.3MB in the beginning and 72.9MB in the end (delta: -20.6MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2025-01-10 00:35:51,866 INFO L158 Benchmark]: TraceAbstraction took 43292.37ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 72.2MB in the beginning and 114.6MB in the end (delta: -42.5MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2025-01-10 00:35:51,867 INFO L158 Benchmark]: Witness Printer took 3.20ms. Allocated memory is still 176.2MB. Free memory was 114.6MB in the beginning and 114.6MB in the end (delta: 15.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:35:51,868 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 83.9MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 732.18ms. Allocated memory is still 117.4MB. Free memory was 89.8MB in the beginning and 57.2MB in the end (delta: 32.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.27ms. Allocated memory is still 117.4MB. Free memory was 57.2MB in the beginning and 54.6MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.40ms. Allocated memory is still 117.4MB. Free memory was 54.6MB in the beginning and 52.3MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 600.44ms. Allocated memory is still 117.4MB. Free memory was 52.3MB in the beginning and 72.9MB in the end (delta: -20.6MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * TraceAbstraction took 43292.37ms. Allocated memory was 117.4MB in the beginning and 176.2MB in the end (delta: 58.7MB). Free memory was 72.2MB in the beginning and 114.6MB in the end (delta: -42.5MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. * Witness Printer took 3.20ms. Allocated memory is still 176.2MB. Free memory was 114.6MB in the beginning and 114.6MB in the end (delta: 15.4kB). 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=0, 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=0, v={4:0}] [L1124] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\old(arg)={0:0}, \result={0:0}, arg={0:0}, t1=0, t2=1, v={4:0}] [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=0, t2=1, v={4:0}] [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={4:0}] [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=0, t2=1, v={4:0}] - 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: 43.1s, OverallIterations: 18, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 21.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2720 SdHoareTripleChecker+Valid, 14.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2407 mSDsluCounter, 2175 SdHoareTripleChecker+Invalid, 12.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2071 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9903 IncrementalHoareTripleChecker+Invalid, 10001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 104 mSDtfsCounter, 9903 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1045 GetRequests, 747 SyntacticMatches, 3 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=682occurred in iteration=16, InterpolantAutomatonStates: 191, 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 578 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 916 ConstructedInterpolants, 107 QuantifiedInterpolants, 16032 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1778 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 28 InterpolantComputations, 6 PerfectInterpolantSequences, 396/1244 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, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-01-10 00:35:51,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample