./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 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/weaver/parallel-min-max-1.wvr.c -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 bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:05:12,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:05:13,019 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:05:13,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:05:13,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:05:13,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:05:13,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:05:13,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:05:13,051 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:05:13,051 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:05:13,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:05:13,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:05:13,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:05:13,052 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:05:13,053 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:05:13,053 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:05:13,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:05:13,054 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:05:13,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:05:13,054 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 -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2025-01-10 01:05:13,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:05:13,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:05:13,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:05:13,278 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:05:13,279 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:05:13,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-01-10 01:05:14,448 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e2b01002a/915dda55a9ca4f098f576f5a27d60704/FLAG9809033cc [2025-01-10 01:05:14,688 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:05:14,688 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-01-10 01:05:14,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e2b01002a/915dda55a9ca4f098f576f5a27d60704/FLAG9809033cc [2025-01-10 01:05:15,012 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e2b01002a/915dda55a9ca4f098f576f5a27d60704 [2025-01-10 01:05:15,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:05:15,015 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:05:15,015 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:05:15,016 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:05:15,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:05:15,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f270079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15, skipping insertion in model container [2025-01-10 01:05:15,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,031 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:05:15,145 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-01-10 01:05:15,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:05:15,154 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:05:15,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:05:15,189 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:05:15,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15 WrapperNode [2025-01-10 01:05:15,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:05:15,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:05:15,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:05:15,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:05:15,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,222 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 119 [2025-01-10 01:05:15,223 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:05:15,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:05:15,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:05:15,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:05:15,234 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,242 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,255 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-10 01:05:15,256 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,260 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,260 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:05:15,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:05:15,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:05:15,266 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:05:15,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (1/1) ... [2025-01-10 01:05:15,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:05:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:15,289 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 01:05:15,291 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 01:05:15,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:05:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:05:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:05:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:05:15,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:05:15,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:05:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:05:15,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:05:15,310 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 01:05:15,390 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:05:15,392 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:05:15,638 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:05:15,639 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:05:15,747 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:05:15,748 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:05:15,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:05:15 BoogieIcfgContainer [2025-01-10 01:05:15,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:05:15,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:05:15,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:05:15,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:05:15,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:05:15" (1/3) ... [2025-01-10 01:05:15,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe234e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:05:15, skipping insertion in model container [2025-01-10 01:05:15,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:05:15" (2/3) ... [2025-01-10 01:05:15,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe234e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:05:15, skipping insertion in model container [2025-01-10 01:05:15,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:05:15" (3/3) ... [2025-01-10 01:05:15,755 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2025-01-10 01:05:15,766 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:05:15,767 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-min-max-1.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 3 loop locations, and 18 error locations. [2025-01-10 01:05:15,767 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:05:15,824 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-01-10 01:05:15,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2025-01-10 01:05:15,878 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2025-01-10 01:05:15,882 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:05:15,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2025-01-10 01:05:15,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2025-01-10 01:05:15,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2025-01-10 01:05:15,894 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:05:15,901 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;@36a4c78e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:05:15,901 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2025-01-10 01:05:15,906 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:05:15,906 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-01-10 01:05:15,906 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:05:15,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:15,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:15,907 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:15,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1806173629, now seen corresponding path program 1 times [2025-01-10 01:05:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007175222] [2025-01-10 01:05:15,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:15,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:05:16,024 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:05:16,024 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:16,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:16,168 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 01:05:16,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007175222] [2025-01-10 01:05:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007175222] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:16,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:16,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:05:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495475517] [2025-01-10 01:05:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:16,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:05:16,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:16,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:05:16,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:05:16,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2025-01-10 01:05:16,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:16,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:16,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2025-01-10 01:05:16,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:16,430 INFO L124 PetriNetUnfolderBase]: 443/945 cut-off events. [2025-01-10 01:05:16,430 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-01-10 01:05:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1642 conditions, 945 events. 443/945 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5995 event pairs, 254 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 1516. Up to 615 conditions per place. [2025-01-10 01:05:16,439 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 29 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-01-10 01:05:16,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 234 flow [2025-01-10 01:05:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:05:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:05:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2025-01-10 01:05:16,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2025-01-10 01:05:16,450 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 183 transitions. [2025-01-10 01:05:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 234 flow [2025-01-10 01:05:16,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 222 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:05:16,461 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 164 flow [2025-01-10 01:05:16,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2025-01-10 01:05:16,466 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2025-01-10 01:05:16,467 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 164 flow [2025-01-10 01:05:16,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:16,468 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:16,468 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:16,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:05:16,468 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:16,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1806173628, now seen corresponding path program 1 times [2025-01-10 01:05:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251642739] [2025-01-10 01:05:16,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:16,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:16,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-01-10 01:05:16,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-01-10 01:05:16,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:16,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:16,788 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 01:05:16,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:16,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251642739] [2025-01-10 01:05:16,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251642739] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:16,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:16,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-10 01:05:16,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165790880] [2025-01-10 01:05:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:16,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:05:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:16,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:05:16,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:05:16,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2025-01-10 01:05:16,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:16,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:16,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2025-01-10 01:05:16,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:17,104 INFO L124 PetriNetUnfolderBase]: 444/948 cut-off events. [2025-01-10 01:05:17,105 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:05:17,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 948 events. 444/948 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6030 event pairs, 254 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 1566. Up to 616 conditions per place. [2025-01-10 01:05:17,113 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 30 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2025-01-10 01:05:17,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 80 transitions, 244 flow [2025-01-10 01:05:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:05:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:05:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2025-01-10 01:05:17,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6567460317460317 [2025-01-10 01:05:17,117 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 164 flow. Second operand 6 states and 331 transitions. [2025-01-10 01:05:17,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 80 transitions, 244 flow [2025-01-10 01:05:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:05:17,121 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 185 flow [2025-01-10 01:05:17,121 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2025-01-10 01:05:17,122 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-01-10 01:05:17,122 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 185 flow [2025-01-10 01:05:17,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.42857142857143) internal successors, (353), 7 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:17,123 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:17,123 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:17,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:05:17,123 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:17,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -156807111, now seen corresponding path program 1 times [2025-01-10 01:05:17,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:17,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469096131] [2025-01-10 01:05:17,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:17,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:17,133 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-10 01:05:17,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 01:05:17,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:17,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:17,225 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 01:05:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:17,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469096131] [2025-01-10 01:05:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469096131] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:17,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:05:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256587257] [2025-01-10 01:05:17,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:17,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:05:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:17,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:05:17,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:05:17,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-01-10 01:05:17,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 01:05:17,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:17,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-01-10 01:05:17,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:17,509 INFO L124 PetriNetUnfolderBase]: 972/1694 cut-off events. [2025-01-10 01:05:17,509 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-01-10 01:05:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 1694 events. 972/1694 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9885 event pairs, 700 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 3059. Up to 1314 conditions per place. [2025-01-10 01:05:17,521 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 36 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2025-01-10 01:05:17,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 249 flow [2025-01-10 01:05:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:05:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:05:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2025-01-10 01:05:17,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-01-10 01:05:17,525 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 185 flow. Second operand 4 states and 192 transitions. [2025-01-10 01:05:17,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 249 flow [2025-01-10 01:05:17,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:05:17,528 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 168 flow [2025-01-10 01:05:17,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2025-01-10 01:05:17,529 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2025-01-10 01:05:17,529 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 168 flow [2025-01-10 01:05:17,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 01:05:17,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:17,530 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:17,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 01:05:17,530 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:17,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -156807110, now seen corresponding path program 1 times [2025-01-10 01:05:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:17,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131313508] [2025-01-10 01:05:17,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:17,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-10 01:05:17,543 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 01:05:17,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:17,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:17,597 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 01:05:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:17,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131313508] [2025-01-10 01:05:17,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131313508] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:17,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:17,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:05:17,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145629085] [2025-01-10 01:05:17,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:17,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:05:17,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:17,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:05:17,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:05:17,608 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2025-01-10 01:05:17,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 01:05:17,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:17,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2025-01-10 01:05:17,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:17,745 INFO L124 PetriNetUnfolderBase]: 443/880 cut-off events. [2025-01-10 01:05:17,746 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-01-10 01:05:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 880 events. 443/880 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5225 event pairs, 254 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 1499. Up to 614 conditions per place. [2025-01-10 01:05:17,752 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 31 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2025-01-10 01:05:17,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 232 flow [2025-01-10 01:05:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:05:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:05:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 235 transitions. [2025-01-10 01:05:17,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2025-01-10 01:05:17,754 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 168 flow. Second operand 4 states and 235 transitions. [2025-01-10 01:05:17,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 232 flow [2025-01-10 01:05:17,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:05:17,756 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 165 flow [2025-01-10 01:05:17,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2025-01-10 01:05:17,756 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -10 predicate places. [2025-01-10 01:05:17,756 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 165 flow [2025-01-10 01:05:17,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 01:05:17,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:17,757 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:17,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-01-10 01:05:17,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:17,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash -566055048, now seen corresponding path program 1 times [2025-01-10 01:05:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376609030] [2025-01-10 01:05:17,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:17,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:05:17,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:05:17,775 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:17,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:18,048 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 01:05:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376609030] [2025-01-10 01:05:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376609030] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017099264] [2025-01-10 01:05:18,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:18,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:18,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:18,053 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 01:05:18,054 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 01:05:18,096 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-01-10 01:05:18,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-01-10 01:05:18,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:18,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:18,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:05:18,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:18,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-01-10 01:05:18,331 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 01:05:18,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:18,569 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 01:05:18,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017099264] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:18,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:18,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-01-10 01:05:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173194691] [2025-01-10 01:05:18,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:18,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:05:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:18,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:05:18,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:05:19,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2025-01-10 01:05:19,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 165 flow. Second operand has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:19,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:19,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2025-01-10 01:05:19,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:19,442 INFO L124 PetriNetUnfolderBase]: 444/882 cut-off events. [2025-01-10 01:05:19,442 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 01:05:19,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1551 conditions, 882 events. 444/882 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5220 event pairs, 254 based on Foata normal form. 0/600 useless extension candidates. Maximal degree in co-relation 1517. Up to 614 conditions per place. [2025-01-10 01:05:19,446 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 25 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2025-01-10 01:05:19,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 248 flow [2025-01-10 01:05:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:05:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:05:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 529 transitions. [2025-01-10 01:05:19,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6297619047619047 [2025-01-10 01:05:19,448 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 165 flow. Second operand 10 states and 529 transitions. [2025-01-10 01:05:19,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 248 flow [2025-01-10 01:05:19,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:05:19,449 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 192 flow [2025-01-10 01:05:19,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=192, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2025-01-10 01:05:19,450 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -5 predicate places. [2025-01-10 01:05:19,450 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 192 flow [2025-01-10 01:05:19,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 50.8) internal successors, (762), 15 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:19,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:19,451 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:19,458 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 01:05:19,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:19,655 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:19,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:19,655 INFO L85 PathProgramCache]: Analyzing trace with hash -367836794, now seen corresponding path program 1 times [2025-01-10 01:05:19,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:19,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801197412] [2025-01-10 01:05:19,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:19,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:19,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-10 01:05:19,669 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-10 01:05:19,670 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:19,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:05:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801197412] [2025-01-10 01:05:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801197412] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238835538] [2025-01-10 01:05:19,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:19,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:19,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:19,743 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 01:05:19,745 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 01:05:19,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-10 01:05:19,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-10 01:05:19,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:19,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:19,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:05:19,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:05:19,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:19,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-01-10 01:05:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:05:19,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238835538] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:19,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-10 01:05:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501677975] [2025-01-10 01:05:19,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:19,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:05:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:19,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:05:19,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:05:20,027 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 84 [2025-01-10 01:05:20,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 192 flow. Second operand has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 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 01:05:20,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:20,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 84 [2025-01-10 01:05:20,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:20,174 INFO L124 PetriNetUnfolderBase]: 602/1159 cut-off events. [2025-01-10 01:05:20,174 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-01-10 01:05:20,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2074 conditions, 1159 events. 602/1159 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7177 event pairs, 377 based on Foata normal form. 0/831 useless extension candidates. Maximal degree in co-relation 2014. Up to 835 conditions per place. [2025-01-10 01:05:20,179 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 34 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2025-01-10 01:05:20,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 262 flow [2025-01-10 01:05:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:05:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-01-10 01:05:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2025-01-10 01:05:20,185 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2025-01-10 01:05:20,185 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 192 flow. Second operand 5 states and 268 transitions. [2025-01-10 01:05:20,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 262 flow [2025-01-10 01:05:20,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 226 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-01-10 01:05:20,186 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 158 flow [2025-01-10 01:05:20,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2025-01-10 01:05:20,187 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2025-01-10 01:05:20,187 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 158 flow [2025-01-10 01:05:20,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 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 01:05:20,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:20,188 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, 1, 1, 1, 1] [2025-01-10 01:05:20,193 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 01:05:20,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:20,392 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:20,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 248024863, now seen corresponding path program 1 times [2025-01-10 01:05:20,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:20,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155678739] [2025-01-10 01:05:20,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:20,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:20,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:05:20,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:05:20,401 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:20,401 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:20,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155678739] [2025-01-10 01:05:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155678739] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:20,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:20,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 01:05:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212655632] [2025-01-10 01:05:20,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:20,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:05:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:20,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:05:20,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:05:20,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2025-01-10 01:05:20,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:20,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:20,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2025-01-10 01:05:20,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:20,502 INFO L124 PetriNetUnfolderBase]: 443/876 cut-off events. [2025-01-10 01:05:20,502 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:05:20,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 876 events. 443/876 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5204 event pairs, 254 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 1495. Up to 624 conditions per place. [2025-01-10 01:05:20,507 INFO L140 encePairwiseOnDemand]: 82/84 looper letters, 37 selfloop transitions, 0 changer transitions 1/71 dead transitions. [2025-01-10 01:05:20,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 71 transitions, 234 flow [2025-01-10 01:05:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:05:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:05:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2025-01-10 01:05:20,508 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7182539682539683 [2025-01-10 01:05:20,509 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 158 flow. Second operand 3 states and 181 transitions. [2025-01-10 01:05:20,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 71 transitions, 234 flow [2025-01-10 01:05:20,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:05:20,510 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 152 flow [2025-01-10 01:05:20,510 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2025-01-10 01:05:20,511 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -11 predicate places. [2025-01-10 01:05:20,511 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 152 flow [2025-01-10 01:05:20,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:20,511 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:20,511 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, 1, 1, 1, 1, 1] [2025-01-10 01:05:20,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-10 01:05:20,511 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:20,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:20,511 INFO L85 PathProgramCache]: Analyzing trace with hash -713450327, now seen corresponding path program 1 times [2025-01-10 01:05:20,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:20,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260309079] [2025-01-10 01:05:20,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:20,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:20,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-10 01:05:20,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-10 01:05:20,520 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:20,520 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:20,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:20,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260309079] [2025-01-10 01:05:20,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260309079] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:20,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:20,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-10 01:05:20,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631061618] [2025-01-10 01:05:20,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:20,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:05:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:20,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:05:20,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:05:20,663 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:05:20,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:20,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:20,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:05:20,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:20,864 INFO L124 PetriNetUnfolderBase]: 1756/2797 cut-off events. [2025-01-10 01:05:20,864 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 01:05:20,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5342 conditions, 2797 events. 1756/2797 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15768 event pairs, 885 based on Foata normal form. 0/2381 useless extension candidates. Maximal degree in co-relation 5338. Up to 1616 conditions per place. [2025-01-10 01:05:20,876 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 56 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2025-01-10 01:05:20,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 320 flow [2025-01-10 01:05:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:05:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:05:20,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 295 transitions. [2025-01-10 01:05:20,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5853174603174603 [2025-01-10 01:05:20,878 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 152 flow. Second operand 6 states and 295 transitions. [2025-01-10 01:05:20,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 320 flow [2025-01-10 01:05:20,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 318 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-01-10 01:05:20,881 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 181 flow [2025-01-10 01:05:20,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2025-01-10 01:05:20,882 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2025-01-10 01:05:20,882 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 181 flow [2025-01-10 01:05:20,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:20,882 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:20,882 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, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:20,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-10 01:05:20,882 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:20,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:20,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1231617418, now seen corresponding path program 1 times [2025-01-10 01:05:20,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:20,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779159248] [2025-01-10 01:05:20,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:20,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:20,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:05:20,893 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:05:20,893 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:20,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:21,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:21,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779159248] [2025-01-10 01:05:21,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779159248] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:21,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238199554] [2025-01-10 01:05:21,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:21,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:21,024 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 01:05:21,027 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 01:05:21,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-01-10 01:05:21,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-01-10 01:05:21,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:21,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:21,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 01:05:21,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:05:21,137 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:05:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238199554] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:21,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:05:21,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-01-10 01:05:21,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652005126] [2025-01-10 01:05:21,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:21,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:05:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:21,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:05:21,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:05:21,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 84 [2025-01-10 01:05:21,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 181 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:21,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:21,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 84 [2025-01-10 01:05:21,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:21,355 INFO L124 PetriNetUnfolderBase]: 1327/2403 cut-off events. [2025-01-10 01:05:21,355 INFO L125 PetriNetUnfolderBase]: For 188/268 co-relation queries the response was YES. [2025-01-10 01:05:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 2403 events. 1327/2403 cut-off events. For 188/268 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16009 event pairs, 710 based on Foata normal form. 162/2227 useless extension candidates. Maximal degree in co-relation 4818. Up to 1332 conditions per place. [2025-01-10 01:05:21,371 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 55 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2025-01-10 01:05:21,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 88 transitions, 343 flow [2025-01-10 01:05:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:05:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:05:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2025-01-10 01:05:21,373 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-01-10 01:05:21,373 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 181 flow. Second operand 4 states and 224 transitions. [2025-01-10 01:05:21,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 88 transitions, 343 flow [2025-01-10 01:05:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-01-10 01:05:21,378 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 191 flow [2025-01-10 01:05:21,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2025-01-10 01:05:21,378 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2025-01-10 01:05:21,379 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 191 flow [2025-01-10 01:05:21,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:21,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:21,380 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:21,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-10 01:05:21,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:21,581 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:21,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:21,581 INFO L85 PathProgramCache]: Analyzing trace with hash 291403631, now seen corresponding path program 1 times [2025-01-10 01:05:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:21,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615444627] [2025-01-10 01:05:21,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:21,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:05:21,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:05:21,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:21,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:21,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615444627] [2025-01-10 01:05:21,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615444627] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435757364] [2025-01-10 01:05:21,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:21,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:21,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:21,658 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 01:05:21,660 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 01:05:21,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:05:21,707 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:05:21,707 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:21,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:21,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:05:21,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:21,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435757364] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:21,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-01-10 01:05:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591131017] [2025-01-10 01:05:21,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:21,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:05:21,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:21,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:05:21,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:05:21,908 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2025-01-10 01:05:21,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 191 flow. Second operand has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:21,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:21,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2025-01-10 01:05:21,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:22,272 INFO L124 PetriNetUnfolderBase]: 1831/3325 cut-off events. [2025-01-10 01:05:22,272 INFO L125 PetriNetUnfolderBase]: For 439/535 co-relation queries the response was YES. [2025-01-10 01:05:22,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7169 conditions, 3325 events. 1831/3325 cut-off events. For 439/535 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23255 event pairs, 914 based on Foata normal form. 110/2957 useless extension candidates. Maximal degree in co-relation 7163. Up to 1457 conditions per place. [2025-01-10 01:05:22,296 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 81 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2025-01-10 01:05:22,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 527 flow [2025-01-10 01:05:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:05:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:05:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 468 transitions. [2025-01-10 01:05:22,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2025-01-10 01:05:22,298 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 191 flow. Second operand 8 states and 468 transitions. [2025-01-10 01:05:22,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 527 flow [2025-01-10 01:05:22,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 124 transitions, 514 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:05:22,301 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 247 flow [2025-01-10 01:05:22,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2025-01-10 01:05:22,303 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2025-01-10 01:05:22,303 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 247 flow [2025-01-10 01:05:22,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.57142857142857) internal successors, (708), 14 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:22,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:22,304 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:22,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-10 01:05:22,504 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,SelfDestructingSolverStorable9 [2025-01-10 01:05:22,505 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:22,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1422503749, now seen corresponding path program 2 times [2025-01-10 01:05:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:22,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017980091] [2025-01-10 01:05:22,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:22,515 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-01-10 01:05:22,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:05:22,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:22,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:05:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017980091] [2025-01-10 01:05:22,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017980091] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019882093] [2025-01-10 01:05:22,677 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:22,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:22,679 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 01:05:22,684 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 01:05:22,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-01-10 01:05:22,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:05:22,740 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:22,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:22,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:05:22,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:22,822 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 01:05:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:05:22,834 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:05:22,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019882093] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:22,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:05:22,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-01-10 01:05:22,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991387562] [2025-01-10 01:05:22,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:22,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:05:22,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:22,835 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:05:22,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:05:23,004 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-01-10 01:05:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 247 flow. Second operand has 8 states, 8 states have (on average 46.625) internal successors, (373), 8 states have internal predecessors, (373), 0 states have call successors, (0), 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 01:05:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-01-10 01:05:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:23,426 INFO L124 PetriNetUnfolderBase]: 2433/4315 cut-off events. [2025-01-10 01:05:23,426 INFO L125 PetriNetUnfolderBase]: For 1230/1409 co-relation queries the response was YES. [2025-01-10 01:05:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9969 conditions, 4315 events. 2433/4315 cut-off events. For 1230/1409 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31248 event pairs, 414 based on Foata normal form. 93/3867 useless extension candidates. Maximal degree in co-relation 9960. Up to 1595 conditions per place. [2025-01-10 01:05:23,446 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 104 selfloop transitions, 14 changer transitions 0/145 dead transitions. [2025-01-10 01:05:23,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 670 flow [2025-01-10 01:05:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:05:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:05:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 493 transitions. [2025-01-10 01:05:23,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6521164021164021 [2025-01-10 01:05:23,448 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 247 flow. Second operand 9 states and 493 transitions. [2025-01-10 01:05:23,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 670 flow [2025-01-10 01:05:23,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 145 transitions, 655 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-01-10 01:05:23,456 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 283 flow [2025-01-10 01:05:23,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=283, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2025-01-10 01:05:23,457 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2025-01-10 01:05:23,457 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 283 flow [2025-01-10 01:05:23,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 46.625) internal successors, (373), 8 states have internal predecessors, (373), 0 states have call successors, (0), 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 01:05:23,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:23,457 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:23,464 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 01:05:23,657 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,SelfDestructingSolverStorable10 [2025-01-10 01:05:23,658 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:23,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1258939600, now seen corresponding path program 1 times [2025-01-10 01:05:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:23,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452054127] [2025-01-10 01:05:23,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:23,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-01-10 01:05:23,670 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:05:23,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:23,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:23,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:23,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452054127] [2025-01-10 01:05:23,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452054127] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:23,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787875074] [2025-01-10 01:05:23,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:23,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:23,752 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 01:05:23,754 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 01:05:23,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-01-10 01:05:23,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-01-10 01:05:23,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:23,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:23,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:05:23,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:23,867 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-10 01:05:23,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787875074] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:23,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:23,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-01-10 01:05:23,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611270940] [2025-01-10 01:05:23,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:23,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:05:23,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:23,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:05:23,920 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:05:23,980 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2025-01-10 01:05:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 283 flow. Second operand has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2025-01-10 01:05:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:24,290 INFO L124 PetriNetUnfolderBase]: 1482/2657 cut-off events. [2025-01-10 01:05:24,291 INFO L125 PetriNetUnfolderBase]: For 2138/2569 co-relation queries the response was YES. [2025-01-10 01:05:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 2657 events. 1482/2657 cut-off events. For 2138/2569 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18019 event pairs, 946 based on Foata normal form. 256/2619 useless extension candidates. Maximal degree in co-relation 6787. Up to 1455 conditions per place. [2025-01-10 01:05:24,301 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 74 selfloop transitions, 12 changer transitions 0/120 dead transitions. [2025-01-10 01:05:24,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 601 flow [2025-01-10 01:05:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:05:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-01-10 01:05:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2025-01-10 01:05:24,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6889880952380952 [2025-01-10 01:05:24,304 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 283 flow. Second operand 8 states and 463 transitions. [2025-01-10 01:05:24,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 601 flow [2025-01-10 01:05:24,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 120 transitions, 580 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:05:24,308 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 325 flow [2025-01-10 01:05:24,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=325, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2025-01-10 01:05:24,310 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2025-01-10 01:05:24,310 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 325 flow [2025-01-10 01:05:24,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 50.714285714285715) internal successors, (710), 14 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:24,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:24,311 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:24,316 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 01:05:24,511 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,SelfDestructingSolverStorable11 [2025-01-10 01:05:24,511 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:24,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1257553736, now seen corresponding path program 1 times [2025-01-10 01:05:24,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:24,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776522235] [2025-01-10 01:05:24,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:24,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:24,518 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-01-10 01:05:24,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-01-10 01:05:24,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:24,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:24,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:24,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776522235] [2025-01-10 01:05:24,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776522235] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:24,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763233650] [2025-01-10 01:05:24,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:24,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:24,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:24,659 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 01:05:24,660 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 01:05:24,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-01-10 01:05:24,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-01-10 01:05:24,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:24,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:24,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:05:24,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:24,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:24,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2025-01-10 01:05:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:24,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763233650] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:24,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2025-01-10 01:05:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127189212] [2025-01-10 01:05:24,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:24,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:05:24,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:24,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:05:24,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:05:25,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:05:25,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 325 flow. Second operand has 20 states, 20 states have (on average 41.5) internal successors, (830), 20 states have internal predecessors, (830), 0 states have call successors, (0), 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 01:05:25,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:25,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:05:25,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:26,152 INFO L124 PetriNetUnfolderBase]: 3973/6279 cut-off events. [2025-01-10 01:05:26,152 INFO L125 PetriNetUnfolderBase]: For 4786/5299 co-relation queries the response was YES. [2025-01-10 01:05:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16613 conditions, 6279 events. 3973/6279 cut-off events. For 4786/5299 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 38288 event pairs, 1096 based on Foata normal form. 353/6042 useless extension candidates. Maximal degree in co-relation 16599. Up to 1349 conditions per place. [2025-01-10 01:05:26,186 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 131 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2025-01-10 01:05:26,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 172 transitions, 881 flow [2025-01-10 01:05:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:05:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:05:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 527 transitions. [2025-01-10 01:05:26,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6273809523809524 [2025-01-10 01:05:26,188 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 325 flow. Second operand 10 states and 527 transitions. [2025-01-10 01:05:26,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 172 transitions, 881 flow [2025-01-10 01:05:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 172 transitions, 864 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-01-10 01:05:26,204 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 376 flow [2025-01-10 01:05:26,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=376, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2025-01-10 01:05:26,206 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 18 predicate places. [2025-01-10 01:05:26,206 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 376 flow [2025-01-10 01:05:26,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.5) internal successors, (830), 20 states have internal predecessors, (830), 0 states have call successors, (0), 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 01:05:26,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:26,206 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:26,212 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 01:05:26,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:26,407 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:26,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -833578212, now seen corresponding path program 2 times [2025-01-10 01:05:26,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:26,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837622657] [2025-01-10 01:05:26,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:26,414 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-01-10 01:05:26,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-01-10 01:05:26,425 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:26,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:05:26,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837622657] [2025-01-10 01:05:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837622657] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624594076] [2025-01-10 01:05:26,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:26,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:26,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:26,609 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 01:05:26,611 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 01:05:26,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-01-10 01:05:26,666 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-01-10 01:05:26,666 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:26,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:26,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:05:26,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:26,752 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 01:05:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-10 01:05:26,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:05:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624594076] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:26,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:05:26,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-01-10 01:05:26,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094037257] [2025-01-10 01:05:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:26,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:05:26,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:26,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:05:26,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:05:26,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 84 [2025-01-10 01:05:26,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 376 flow. Second operand has 8 states, 8 states have (on average 46.875) internal successors, (375), 8 states have internal predecessors, (375), 0 states have call successors, (0), 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 01:05:26,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:26,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 84 [2025-01-10 01:05:26,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:27,254 INFO L124 PetriNetUnfolderBase]: 2420/4302 cut-off events. [2025-01-10 01:05:27,254 INFO L125 PetriNetUnfolderBase]: For 6967/7530 co-relation queries the response was YES. [2025-01-10 01:05:27,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12447 conditions, 4302 events. 2420/4302 cut-off events. For 6967/7530 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 29192 event pairs, 656 based on Foata normal form. 244/4225 useless extension candidates. Maximal degree in co-relation 12431. Up to 1672 conditions per place. [2025-01-10 01:05:27,279 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 134 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2025-01-10 01:05:27,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 179 transitions, 1216 flow [2025-01-10 01:05:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:05:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:05:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 487 transitions. [2025-01-10 01:05:27,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6441798941798942 [2025-01-10 01:05:27,280 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 376 flow. Second operand 9 states and 487 transitions. [2025-01-10 01:05:27,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 179 transitions, 1216 flow [2025-01-10 01:05:27,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1090 flow, removed 32 selfloop flow, removed 6 redundant places. [2025-01-10 01:05:27,290 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 391 flow [2025-01-10 01:05:27,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=391, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2025-01-10 01:05:27,291 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 22 predicate places. [2025-01-10 01:05:27,291 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 391 flow [2025-01-10 01:05:27,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 46.875) internal successors, (375), 8 states have internal predecessors, (375), 0 states have call successors, (0), 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 01:05:27,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:27,291 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:27,297 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 01:05:27,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:27,492 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:27,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2059172185, now seen corresponding path program 1 times [2025-01-10 01:05:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:27,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225752168] [2025-01-10 01:05:27,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:27,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:27,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-10 01:05:27,503 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-10 01:05:27,503 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:27,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225752168] [2025-01-10 01:05:27,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225752168] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:27,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706968392] [2025-01-10 01:05:27,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:27,635 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 01:05:27,637 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 01:05:27,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-01-10 01:05:27,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-01-10 01:05:27,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:27,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:27,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 01:05:27,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:27,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:27,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2025-01-10 01:05:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706968392] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:27,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2025-01-10 01:05:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371500454] [2025-01-10 01:05:27,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:27,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:05:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:27,979 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:05:27,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:05:28,301 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:05:28,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 391 flow. Second operand has 20 states, 20 states have (on average 41.8) internal successors, (836), 20 states have internal predecessors, (836), 0 states have call successors, (0), 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 01:05:28,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:28,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:05:28,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:29,044 INFO L124 PetriNetUnfolderBase]: 5099/8103 cut-off events. [2025-01-10 01:05:29,044 INFO L125 PetriNetUnfolderBase]: For 9922/10748 co-relation queries the response was YES. [2025-01-10 01:05:29,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24096 conditions, 8103 events. 5099/8103 cut-off events. For 9922/10748 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 51171 event pairs, 1526 based on Foata normal form. 718/8264 useless extension candidates. Maximal degree in co-relation 24079. Up to 2010 conditions per place. [2025-01-10 01:05:29,083 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 145 selfloop transitions, 14 changer transitions 0/186 dead transitions. [2025-01-10 01:05:29,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1113 flow [2025-01-10 01:05:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:05:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:05:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 521 transitions. [2025-01-10 01:05:29,084 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6202380952380953 [2025-01-10 01:05:29,084 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 391 flow. Second operand 10 states and 521 transitions. [2025-01-10 01:05:29,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1113 flow [2025-01-10 01:05:29,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1092 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:05:29,100 INFO L231 Difference]: Finished difference. Result has 111 places, 94 transitions, 438 flow [2025-01-10 01:05:29,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=438, PETRI_PLACES=111, PETRI_TRANSITIONS=94} [2025-01-10 01:05:29,101 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2025-01-10 01:05:29,101 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 94 transitions, 438 flow [2025-01-10 01:05:29,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 41.8) internal successors, (836), 20 states have internal predecessors, (836), 0 states have call successors, (0), 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 01:05:29,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:29,101 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:29,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 01:05:29,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:29,306 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:29,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -934183938, now seen corresponding path program 1 times [2025-01-10 01:05:29,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:29,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167767687] [2025-01-10 01:05:29,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:29,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:29,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:05:29,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:05:29,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:29,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:29,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167767687] [2025-01-10 01:05:29,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167767687] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:29,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185598394] [2025-01-10 01:05:29,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:29,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:29,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:29,393 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 01:05:29,394 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 01:05:29,430 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-01-10 01:05:29,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-01-10 01:05:29,445 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:29,445 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:29,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:05:29,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:29,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185598394] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:29,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:29,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-01-10 01:05:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700230402] [2025-01-10 01:05:29,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:29,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:05:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:29,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:05:29,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:05:29,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2025-01-10 01:05:29,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 94 transitions, 438 flow. Second operand has 19 states, 19 states have (on average 50.526315789473685) internal successors, (960), 19 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:05:29,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:29,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2025-01-10 01:05:29,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:30,182 INFO L124 PetriNetUnfolderBase]: 3609/6377 cut-off events. [2025-01-10 01:05:30,183 INFO L125 PetriNetUnfolderBase]: For 13642/14686 co-relation queries the response was YES. [2025-01-10 01:05:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20374 conditions, 6377 events. 3609/6377 cut-off events. For 13642/14686 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 45452 event pairs, 1634 based on Foata normal form. 340/6047 useless extension candidates. Maximal degree in co-relation 20355. Up to 2491 conditions per place. [2025-01-10 01:05:30,222 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 123 selfloop transitions, 20 changer transitions 0/181 dead transitions. [2025-01-10 01:05:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 181 transitions, 1199 flow [2025-01-10 01:05:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:05:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:05:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 581 transitions. [2025-01-10 01:05:30,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2025-01-10 01:05:30,223 INFO L175 Difference]: Start difference. First operand has 111 places, 94 transitions, 438 flow. Second operand 10 states and 581 transitions. [2025-01-10 01:05:30,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 181 transitions, 1199 flow [2025-01-10 01:05:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 181 transitions, 1102 flow, removed 27 selfloop flow, removed 6 redundant places. [2025-01-10 01:05:30,242 INFO L231 Difference]: Finished difference. Result has 120 places, 103 transitions, 549 flow [2025-01-10 01:05:30,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=549, PETRI_PLACES=120, PETRI_TRANSITIONS=103} [2025-01-10 01:05:30,243 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 36 predicate places. [2025-01-10 01:05:30,243 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 103 transitions, 549 flow [2025-01-10 01:05:30,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 50.526315789473685) internal successors, (960), 19 states have internal predecessors, (960), 0 states have call successors, (0), 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 01:05:30,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:30,244 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:30,250 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 01:05:30,444 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,SelfDestructingSolverStorable15 [2025-01-10 01:05:30,445 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:30,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:30,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1804394783, now seen corresponding path program 1 times [2025-01-10 01:05:30,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:30,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018513245] [2025-01-10 01:05:30,445 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:30,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:30,450 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:05:30,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:05:30,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:30,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:30,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:30,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018513245] [2025-01-10 01:05:30,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018513245] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:30,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841225348] [2025-01-10 01:05:30,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:30,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:30,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:30,550 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 01:05:30,552 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 01:05:30,589 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-01-10 01:05:30,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:05:30,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:30,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:30,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:05:30,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:30,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-10 01:05:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841225348] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:30,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:30,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-01-10 01:05:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583492596] [2025-01-10 01:05:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:30,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 01:05:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:30,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 01:05:30,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-01-10 01:05:30,905 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 84 [2025-01-10 01:05:30,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 103 transitions, 549 flow. Second operand has 19 states, 19 states have (on average 50.63157894736842) internal successors, (962), 19 states have internal predecessors, (962), 0 states have call successors, (0), 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 01:05:30,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:30,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 84 [2025-01-10 01:05:30,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:31,410 INFO L124 PetriNetUnfolderBase]: 3238/5699 cut-off events. [2025-01-10 01:05:31,410 INFO L125 PetriNetUnfolderBase]: For 12390/13296 co-relation queries the response was YES. [2025-01-10 01:05:31,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18884 conditions, 5699 events. 3238/5699 cut-off events. For 12390/13296 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40188 event pairs, 1531 based on Foata normal form. 437/5588 useless extension candidates. Maximal degree in co-relation 18861. Up to 2495 conditions per place. [2025-01-10 01:05:31,483 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 116 selfloop transitions, 20 changer transitions 0/175 dead transitions. [2025-01-10 01:05:31,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 1245 flow [2025-01-10 01:05:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-10 01:05:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-01-10 01:05:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 578 transitions. [2025-01-10 01:05:31,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6880952380952381 [2025-01-10 01:05:31,486 INFO L175 Difference]: Start difference. First operand has 120 places, 103 transitions, 549 flow. Second operand 10 states and 578 transitions. [2025-01-10 01:05:31,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 1245 flow [2025-01-10 01:05:31,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 175 transitions, 1216 flow, removed 12 selfloop flow, removed 2 redundant places. [2025-01-10 01:05:31,501 INFO L231 Difference]: Finished difference. Result has 131 places, 109 transitions, 660 flow [2025-01-10 01:05:31,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=660, PETRI_PLACES=131, PETRI_TRANSITIONS=109} [2025-01-10 01:05:31,502 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 47 predicate places. [2025-01-10 01:05:31,502 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 109 transitions, 660 flow [2025-01-10 01:05:31,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 50.63157894736842) internal successors, (962), 19 states have internal predecessors, (962), 0 states have call successors, (0), 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 01:05:31,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:31,502 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:31,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-10 01:05:31,703 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,SelfDestructingSolverStorable16 [2025-01-10 01:05:31,703 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:31,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:31,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1584314038, now seen corresponding path program 2 times [2025-01-10 01:05:31,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:31,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285917143] [2025-01-10 01:05:31,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:31,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:31,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-01-10 01:05:31,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:05:31,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:31,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-10 01:05:31,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285917143] [2025-01-10 01:05:31,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285917143] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:31,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493908620] [2025-01-10 01:05:31,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:31,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:31,861 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 01:05:31,862 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 01:05:31,899 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-01-10 01:05:31,917 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-01-10 01:05:31,917 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:31,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:31,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:05:31,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:32,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:32,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-01-10 01:05:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:32,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493908620] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:32,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:32,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2025-01-10 01:05:32,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356899129] [2025-01-10 01:05:32,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:32,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-10 01:05:32,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:32,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-10 01:05:32,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2025-01-10 01:05:33,319 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:05:33,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 109 transitions, 660 flow. Second operand has 25 states, 25 states have (on average 42.0) internal successors, (1050), 25 states have internal predecessors, (1050), 0 states have call successors, (0), 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 01:05:33,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:33,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:05:33,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:34,830 INFO L124 PetriNetUnfolderBase]: 6182/9374 cut-off events. [2025-01-10 01:05:34,830 INFO L125 PetriNetUnfolderBase]: For 27919/31178 co-relation queries the response was YES. [2025-01-10 01:05:34,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32571 conditions, 9374 events. 6182/9374 cut-off events. For 27919/31178 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 59595 event pairs, 717 based on Foata normal form. 701/9241 useless extension candidates. Maximal degree in co-relation 32543. Up to 1176 conditions per place. [2025-01-10 01:05:34,887 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 237 selfloop transitions, 29 changer transitions 0/297 dead transitions. [2025-01-10 01:05:34,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 297 transitions, 2188 flow [2025-01-10 01:05:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-01-10 01:05:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-01-10 01:05:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 863 transitions. [2025-01-10 01:05:34,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6043417366946778 [2025-01-10 01:05:34,889 INFO L175 Difference]: Start difference. First operand has 131 places, 109 transitions, 660 flow. Second operand 17 states and 863 transitions. [2025-01-10 01:05:34,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 297 transitions, 2188 flow [2025-01-10 01:05:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 297 transitions, 2142 flow, removed 15 selfloop flow, removed 5 redundant places. [2025-01-10 01:05:34,922 INFO L231 Difference]: Finished difference. Result has 144 places, 113 transitions, 745 flow [2025-01-10 01:05:34,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=745, PETRI_PLACES=144, PETRI_TRANSITIONS=113} [2025-01-10 01:05:34,923 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 60 predicate places. [2025-01-10 01:05:34,923 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 113 transitions, 745 flow [2025-01-10 01:05:34,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 42.0) internal successors, (1050), 25 states have internal predecessors, (1050), 0 states have call successors, (0), 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 01:05:34,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:34,924 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:05:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-10 01:05:35,128 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,SelfDestructingSolverStorable17 [2025-01-10 01:05:35,128 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:35,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash -200373397, now seen corresponding path program 2 times [2025-01-10 01:05:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:35,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622151549] [2025-01-10 01:05:35,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:35,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:35,134 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-01-10 01:05:35,147 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-10 01:05:35,148 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:35,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-01-10 01:05:35,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622151549] [2025-01-10 01:05:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622151549] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974474157] [2025-01-10 01:05:35,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:35,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:35,257 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 01:05:35,258 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 01:05:35,298 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-01-10 01:05:35,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-01-10 01:05:35,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:05:35,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:35,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-10 01:05:35,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:35,329 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 01:05:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:35,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974474157] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:35,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:35,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2025-01-10 01:05:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233548538] [2025-01-10 01:05:35,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:35,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:05:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:35,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:05:35,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:05:36,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 84 [2025-01-10 01:05:36,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 113 transitions, 745 flow. Second operand has 24 states, 24 states have (on average 41.375) internal successors, (993), 24 states have internal predecessors, (993), 0 states have call successors, (0), 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 01:05:36,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:36,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 84 [2025-01-10 01:05:36,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:37,962 INFO L124 PetriNetUnfolderBase]: 7433/11155 cut-off events. [2025-01-10 01:05:37,962 INFO L125 PetriNetUnfolderBase]: For 36750/38350 co-relation queries the response was YES. [2025-01-10 01:05:38,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40449 conditions, 11155 events. 7433/11155 cut-off events. For 36750/38350 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 71495 event pairs, 1099 based on Foata normal form. 439/10546 useless extension candidates. Maximal degree in co-relation 40418. Up to 1542 conditions per place. [2025-01-10 01:05:38,136 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 226 selfloop transitions, 26 changer transitions 0/285 dead transitions. [2025-01-10 01:05:38,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 285 transitions, 2325 flow [2025-01-10 01:05:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:05:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-01-10 01:05:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 789 transitions. [2025-01-10 01:05:38,137 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5870535714285714 [2025-01-10 01:05:38,137 INFO L175 Difference]: Start difference. First operand has 144 places, 113 transitions, 745 flow. Second operand 16 states and 789 transitions. [2025-01-10 01:05:38,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 285 transitions, 2325 flow [2025-01-10 01:05:38,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 285 transitions, 2024 flow, removed 66 selfloop flow, removed 12 redundant places. [2025-01-10 01:05:38,172 INFO L231 Difference]: Finished difference. Result has 149 places, 117 transitions, 752 flow [2025-01-10 01:05:38,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=752, PETRI_PLACES=149, PETRI_TRANSITIONS=117} [2025-01-10 01:05:38,172 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 65 predicate places. [2025-01-10 01:05:38,173 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 117 transitions, 752 flow [2025-01-10 01:05:38,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 41.375) internal successors, (993), 24 states have internal predecessors, (993), 0 states have call successors, (0), 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 01:05:38,173 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:38,173 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, 1, 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 01:05:38,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 01:05:38,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:38,373 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:38,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 724219708, now seen corresponding path program 1 times [2025-01-10 01:05:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815763285] [2025-01-10 01:05:38,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:38,379 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-10 01:05:38,382 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 01:05:38,383 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:38,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:38,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:38,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815763285] [2025-01-10 01:05:38,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815763285] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:38,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:38,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:05:38,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138715979] [2025-01-10 01:05:38,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:38,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:05:38,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:38,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:05:38,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:05:38,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2025-01-10 01:05:38,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 117 transitions, 752 flow. Second operand has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:38,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:38,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2025-01-10 01:05:38,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:38,989 INFO L124 PetriNetUnfolderBase]: 3632/6500 cut-off events. [2025-01-10 01:05:38,989 INFO L125 PetriNetUnfolderBase]: For 20679/21372 co-relation queries the response was YES. [2025-01-10 01:05:39,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 6500 events. 3632/6500 cut-off events. For 20679/21372 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 44912 event pairs, 1897 based on Foata normal form. 313/5956 useless extension candidates. Maximal degree in co-relation 22843. Up to 3946 conditions per place. [2025-01-10 01:05:39,028 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 88 selfloop transitions, 7 changer transitions 0/139 dead transitions. [2025-01-10 01:05:39,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 139 transitions, 1131 flow [2025-01-10 01:05:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:05:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:05:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 242 transitions. [2025-01-10 01:05:39,029 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7202380952380952 [2025-01-10 01:05:39,029 INFO L175 Difference]: Start difference. First operand has 149 places, 117 transitions, 752 flow. Second operand 4 states and 242 transitions. [2025-01-10 01:05:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 139 transitions, 1131 flow [2025-01-10 01:05:39,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 139 transitions, 1009 flow, removed 23 selfloop flow, removed 11 redundant places. [2025-01-10 01:05:39,052 INFO L231 Difference]: Finished difference. Result has 141 places, 114 transitions, 662 flow [2025-01-10 01:05:39,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=662, PETRI_PLACES=141, PETRI_TRANSITIONS=114} [2025-01-10 01:05:39,052 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 57 predicate places. [2025-01-10 01:05:39,052 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 114 transitions, 662 flow [2025-01-10 01:05:39,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.75) internal successors, (223), 4 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:39,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:39,052 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, 1, 1, 1, 1, 1, 1, 1, 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 01:05:39,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-01-10 01:05:39,053 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:39,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:39,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1395938109, now seen corresponding path program 1 times [2025-01-10 01:05:39,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:39,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215131944] [2025-01-10 01:05:39,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:39,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:39,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-01-10 01:05:39,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-01-10 01:05:39,063 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:39,063 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 01:05:39,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:39,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215131944] [2025-01-10 01:05:39,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215131944] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:39,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:05:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121027649] [2025-01-10 01:05:39,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:39,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:05:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:39,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:05:39,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:05:39,113 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2025-01-10 01:05:39,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 114 transitions, 662 flow. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:39,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:39,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2025-01-10 01:05:39,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:39,693 INFO L124 PetriNetUnfolderBase]: 3389/6361 cut-off events. [2025-01-10 01:05:39,693 INFO L125 PetriNetUnfolderBase]: For 17383/18285 co-relation queries the response was YES. [2025-01-10 01:05:39,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20851 conditions, 6361 events. 3389/6361 cut-off events. For 17383/18285 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 46591 event pairs, 2074 based on Foata normal form. 279/5859 useless extension candidates. Maximal degree in co-relation 20828. Up to 3817 conditions per place. [2025-01-10 01:05:39,739 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 81 selfloop transitions, 7 changer transitions 0/132 dead transitions. [2025-01-10 01:05:39,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 132 transitions, 952 flow [2025-01-10 01:05:39,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 01:05:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 01:05:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2025-01-10 01:05:39,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2025-01-10 01:05:39,740 INFO L175 Difference]: Start difference. First operand has 141 places, 114 transitions, 662 flow. Second operand 4 states and 241 transitions. [2025-01-10 01:05:39,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 132 transitions, 952 flow [2025-01-10 01:05:39,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 132 transitions, 926 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-01-10 01:05:39,764 INFO L231 Difference]: Finished difference. Result has 139 places, 111 transitions, 630 flow [2025-01-10 01:05:39,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=630, PETRI_PLACES=139, PETRI_TRANSITIONS=111} [2025-01-10 01:05:39,766 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 55 predicate places. [2025-01-10 01:05:39,766 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 111 transitions, 630 flow [2025-01-10 01:05:39,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:39,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:39,766 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:39,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-01-10 01:05:39,766 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:39,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -122504362, now seen corresponding path program 1 times [2025-01-10 01:05:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:39,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037314458] [2025-01-10 01:05:39,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:39,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-10 01:05:39,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-10 01:05:39,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:39,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 01:05:40,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:40,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037314458] [2025-01-10 01:05:40,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037314458] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:05:40,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560406218] [2025-01-10 01:05:40,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:05:40,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:05:40,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:05:40,066 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 01:05:40,069 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 01:05:40,113 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-01-10 01:05:40,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-01-10 01:05:40,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:05:40,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:40,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-10 01:05:40,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:05:40,228 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 01:05:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:05:40,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:05:40,341 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-01-10 01:05:40,341 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 9 [2025-01-10 01:05:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:05:40,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560406218] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:05:40,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:05:40,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 18 [2025-01-10 01:05:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32221946] [2025-01-10 01:05:40,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:05:40,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:05:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:40,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:05:40,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:05:40,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 84 [2025-01-10 01:05:40,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 111 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 34.111111111111114) internal successors, (614), 18 states have internal predecessors, (614), 0 states have call successors, (0), 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 01:05:40,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:40,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 84 [2025-01-10 01:05:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:05:54,886 INFO L124 PetriNetUnfolderBase]: 73822/110993 cut-off events. [2025-01-10 01:05:54,886 INFO L125 PetriNetUnfolderBase]: For 225343/227700 co-relation queries the response was YES. [2025-01-10 01:05:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351369 conditions, 110993 events. 73822/110993 cut-off events. For 225343/227700 co-relation queries the response was YES. Maximal size of possible extension queue 1634. Compared 818464 event pairs, 547 based on Foata normal form. 6/105882 useless extension candidates. Maximal degree in co-relation 351346. Up to 13066 conditions per place. [2025-01-10 01:05:55,645 INFO L140 encePairwiseOnDemand]: 59/84 looper letters, 1053 selfloop transitions, 469 changer transitions 1308/2843 dead transitions. [2025-01-10 01:05:55,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 2843 transitions, 21997 flow [2025-01-10 01:05:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2025-01-10 01:05:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2025-01-10 01:05:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 7614 transitions. [2025-01-10 01:05:55,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4487270155586987 [2025-01-10 01:05:55,655 INFO L175 Difference]: Start difference. First operand has 139 places, 111 transitions, 630 flow. Second operand 202 states and 7614 transitions. [2025-01-10 01:05:55,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 2843 transitions, 21997 flow [2025-01-10 01:05:56,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 2843 transitions, 21555 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 01:05:56,727 INFO L231 Difference]: Finished difference. Result has 501 places, 592 transitions, 6487 flow [2025-01-10 01:05:56,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=202, PETRI_FLOW=6487, PETRI_PLACES=501, PETRI_TRANSITIONS=592} [2025-01-10 01:05:56,728 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 417 predicate places. [2025-01-10 01:05:56,728 INFO L471 AbstractCegarLoop]: Abstraction has has 501 places, 592 transitions, 6487 flow [2025-01-10 01:05:56,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 34.111111111111114) internal successors, (614), 18 states have internal predecessors, (614), 0 states have call successors, (0), 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 01:05:56,728 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:05:56,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:56,735 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 01:05:56,928 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,SelfDestructingSolverStorable21 [2025-01-10 01:05:56,929 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:05:56,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:05:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -904951808, now seen corresponding path program 2 times [2025-01-10 01:05:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:05:56,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748690682] [2025-01-10 01:05:56,929 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:05:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:05:56,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-01-10 01:05:56,938 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 32 of 59 statements. [2025-01-10 01:05:56,938 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-01-10 01:05:56,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:05:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:05:57,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:05:57,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748690682] [2025-01-10 01:05:57,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748690682] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:05:57,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:05:57,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-01-10 01:05:57,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566122713] [2025-01-10 01:05:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:05:57,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-10 01:05:57,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:05:57,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-10 01:05:57,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-01-10 01:05:57,209 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:05:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 592 transitions, 6487 flow. Second operand has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:05:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:05:57,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:05:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:06:16,153 INFO L124 PetriNetUnfolderBase]: 41555/69779 cut-off events. [2025-01-10 01:06:16,153 INFO L125 PetriNetUnfolderBase]: For 8324730/8332675 co-relation queries the response was YES. [2025-01-10 01:06:18,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706253 conditions, 69779 events. 41555/69779 cut-off events. For 8324730/8332675 co-relation queries the response was YES. Maximal size of possible extension queue 1266. Compared 581092 event pairs, 14190 based on Foata normal form. 675/67132 useless extension candidates. Maximal degree in co-relation 706066. Up to 36405 conditions per place. [2025-01-10 01:06:18,592 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 431 selfloop transitions, 54 changer transitions 228/933 dead transitions. [2025-01-10 01:06:18,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 933 transitions, 12779 flow [2025-01-10 01:06:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-01-10 01:06:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-01-10 01:06:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 695 transitions. [2025-01-10 01:06:18,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5909863945578231 [2025-01-10 01:06:18,594 INFO L175 Difference]: Start difference. First operand has 501 places, 592 transitions, 6487 flow. Second operand 14 states and 695 transitions. [2025-01-10 01:06:18,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 933 transitions, 12779 flow [2025-01-10 01:06:41,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 933 transitions, 11207 flow, removed 605 selfloop flow, removed 85 redundant places. [2025-01-10 01:06:41,286 INFO L231 Difference]: Finished difference. Result has 339 places, 626 transitions, 6579 flow [2025-01-10 01:06:41,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5689, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6579, PETRI_PLACES=339, PETRI_TRANSITIONS=626} [2025-01-10 01:06:41,287 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 255 predicate places. [2025-01-10 01:06:41,287 INFO L471 AbstractCegarLoop]: Abstraction has has 339 places, 626 transitions, 6579 flow [2025-01-10 01:06:41,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 44.857142857142854) internal successors, (314), 7 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:06:41,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:06:41,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:41,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-01-10 01:06:41,287 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-01-10 01:06:41,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:06:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash -986990856, now seen corresponding path program 3 times [2025-01-10 01:06:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:06:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192124383] [2025-01-10 01:06:41,288 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:06:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:06:41,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 3 equivalence classes. [2025-01-10 01:06:41,297 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 44 of 59 statements. [2025-01-10 01:06:41,297 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-01-10 01:06:41,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:06:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-01-10 01:06:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:06:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192124383] [2025-01-10 01:06:41,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192124383] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:06:41,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:06:41,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 01:06:41,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871483418] [2025-01-10 01:06:41,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:06:41,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-01-10 01:06:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:06:41,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-01-10 01:06:41,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:06:41,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 84 [2025-01-10 01:06:41,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 626 transitions, 6579 flow. Second operand has 8 states, 8 states have (on average 44.0) internal successors, (352), 8 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 01:06:41,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:06:41,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 84 [2025-01-10 01:06:41,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand