./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-subst.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/chl-nzb-file-subst.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 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:03:01,575 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:03:01,661 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 01:03:01,669 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:03:01,674 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:03:01,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:03:01,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:03:01,714 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:03:01,714 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:03:01,714 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:03:01,714 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:03:01,714 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:03:01,715 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:03:01,716 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:03:01,716 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:03:01,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 01:03:01,717 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:03:01,718 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 01:03:01,721 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:03:01,721 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:03:01,722 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:03:01,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:03:01,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:03:01,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:03:01,722 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 -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2025-01-10 01:03:01,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:03:01,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:03:01,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:03:01,999 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:03:02,000 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:03:02,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-01-10 01:03:03,129 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2b723cb1c/426708e78a384b92a0e6da4e20802c78/FLAGb29ab65c6 [2025-01-10 01:03:03,412 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:03:03,416 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2025-01-10 01:03:03,423 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2b723cb1c/426708e78a384b92a0e6da4e20802c78/FLAGb29ab65c6 [2025-01-10 01:03:03,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2b723cb1c/426708e78a384b92a0e6da4e20802c78 [2025-01-10 01:03:03,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:03:03,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:03:03,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:03:03,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:03:03,447 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:03:03,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72531e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03, skipping insertion in model container [2025-01-10 01:03:03,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,473 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:03:03,623 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 01:03:03,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:03:03,632 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:03:03,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:03:03,667 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:03:03,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03 WrapperNode [2025-01-10 01:03:03,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:03:03,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:03:03,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:03:03,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:03:03,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,679 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,703 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 593 [2025-01-10 01:03:03,703 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:03:03,704 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:03:03,704 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:03:03,704 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:03:03,709 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,713 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,743 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-01-10 01:03:03,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,762 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,784 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:03:03,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:03:03,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:03:03,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:03:03,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (1/1) ... [2025-01-10 01:03:03,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:03:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:03,821 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 01:03:03,828 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 01:03:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:03:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-01-10 01:03:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-01-10 01:03:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-01-10 01:03:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-01-10 01:03:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-01-10 01:03:03,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:03:03,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:03:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-10 01:03:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-10 01:03:03,852 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 01:03:03,974 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:03:03,976 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:03:04,708 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 01:03:04,709 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:03:05,294 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:03:05,295 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2025-01-10 01:03:05,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:05 BoogieIcfgContainer [2025-01-10 01:03:05,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:03:05,297 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:03:05,297 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:03:05,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:03:05,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:03:03" (1/3) ... [2025-01-10 01:03:05,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634861b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:05, skipping insertion in model container [2025-01-10 01:03:05,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:03:03" (2/3) ... [2025-01-10 01:03:05,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@634861b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:03:05, skipping insertion in model container [2025-01-10 01:03:05,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:03:05" (3/3) ... [2025-01-10 01:03:05,304 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2025-01-10 01:03:05,316 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:03:05,318 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-subst.wvr.c that has 4 procedures, 157 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2025-01-10 01:03:05,318 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 01:03:05,451 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-01-10 01:03:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2025-01-10 01:03:05,557 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2025-01-10 01:03:05,560 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-01-10 01:03:05,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 30/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 700 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2025-01-10 01:03:05,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2025-01-10 01:03:05,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2025-01-10 01:03:05,583 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:03:05,596 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;@4a45eb98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:03:05,596 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2025-01-10 01:03:05,602 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 01:03:05,602 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-01-10 01:03:05,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 01:03:05,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:05,603 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:03:05,603 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-01-10 01:03:05,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1881198, now seen corresponding path program 1 times [2025-01-10 01:03:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:05,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607642677] [2025-01-10 01:03:05,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:05,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:03:05,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:03:05,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:05,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:05,874 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 01:03:05,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607642677] [2025-01-10 01:03:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607642677] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:03:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:03:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-01-10 01:03:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302788876] [2025-01-10 01:03:05,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:03:05,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:03:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:05,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:03:05,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:03:05,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-01-10 01:03:05,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 01:03:05,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:05,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-01-10 01:03:05,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:12,022 INFO L124 PetriNetUnfolderBase]: 49593/89416 cut-off events. [2025-01-10 01:03:12,024 INFO L125 PetriNetUnfolderBase]: For 1202/1202 co-relation queries the response was YES. [2025-01-10 01:03:12,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153848 conditions, 89416 events. 49593/89416 cut-off events. For 1202/1202 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 854667 event pairs, 29461 based on Foata normal form. 1/71719 useless extension candidates. Maximal degree in co-relation 150546. Up to 63484 conditions per place. [2025-01-10 01:03:12,612 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2025-01-10 01:03:12,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2025-01-10 01:03:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:03:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:03:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2025-01-10 01:03:12,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2025-01-10 01:03:12,628 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2025-01-10 01:03:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2025-01-10 01:03:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-01-10 01:03:12,655 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2025-01-10 01:03:12,657 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2025-01-10 01:03:12,660 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2025-01-10 01:03:12,660 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2025-01-10 01:03:12,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 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 01:03:12,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:12,661 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 01:03:12,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:03:12,661 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-01-10 01:03:12,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:12,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1881199, now seen corresponding path program 1 times [2025-01-10 01:03:12,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67674797] [2025-01-10 01:03:12,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:12,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:12,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 01:03:12,710 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 01:03:12,710 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:12,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:12,975 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 01:03:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:12,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67674797] [2025-01-10 01:03:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67674797] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:03:12,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:03:12,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:03:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507028601] [2025-01-10 01:03:12,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:03:12,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 01:03:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:12,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 01:03:12,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-10 01:03:13,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-01-10 01:03:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 01:03:13,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:13,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-01-10 01:03:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:18,246 INFO L124 PetriNetUnfolderBase]: 49596/89425 cut-off events. [2025-01-10 01:03:18,247 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2025-01-10 01:03:18,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153247 conditions, 89425 events. 49596/89425 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 854771 event pairs, 29461 based on Foata normal form. 0/71723 useless extension candidates. Maximal degree in co-relation 153197. Up to 63497 conditions per place. [2025-01-10 01:03:18,899 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2025-01-10 01:03:18,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2025-01-10 01:03:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:03:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 01:03:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2025-01-10 01:03:18,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2025-01-10 01:03:18,905 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2025-01-10 01:03:18,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2025-01-10 01:03:18,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:03:18,909 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2025-01-10 01:03:18,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2025-01-10 01:03:18,912 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2025-01-10 01:03:18,912 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2025-01-10 01:03:18,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 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 01:03:18,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:18,912 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-01-10 01:03:18,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:03:18,912 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-01-10 01:03:18,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1807892343, now seen corresponding path program 1 times [2025-01-10 01:03:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269689799] [2025-01-10 01:03:18,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:18,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:03:18,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:03:18,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:18,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:19,146 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 01:03:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:19,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269689799] [2025-01-10 01:03:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269689799] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609616978] [2025-01-10 01:03:19,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:19,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:19,149 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 01:03:19,151 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 01:03:19,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-01-10 01:03:19,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-01-10 01:03:19,229 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:19,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:19,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:03:19,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:19,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:03:19,294 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 01:03:19,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:19,333 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 01:03:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609616978] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:19,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:19,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2025-01-10 01:03:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95427412] [2025-01-10 01:03:19,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:19,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-01-10 01:03:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:19,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-01-10 01:03:19,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-01-10 01:03:19,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-01-10 01:03:19,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 0 states have call successors, (0), 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 01:03:19,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:19,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-01-10 01:03:19,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:25,250 INFO L124 PetriNetUnfolderBase]: 49599/89446 cut-off events. [2025-01-10 01:03:25,250 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2025-01-10 01:03:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153325 conditions, 89446 events. 49599/89446 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 854765 event pairs, 29461 based on Foata normal form. 6/71754 useless extension candidates. Maximal degree in co-relation 153229. Up to 63498 conditions per place. [2025-01-10 01:03:25,671 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2025-01-10 01:03:25,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 728 flow [2025-01-10 01:03:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:03:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 01:03:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2025-01-10 01:03:25,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2025-01-10 01:03:25,675 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2025-01-10 01:03:25,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 728 flow [2025-01-10 01:03:25,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 204 transitions, 708 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 01:03:25,678 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2025-01-10 01:03:25,679 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2025-01-10 01:03:25,679 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2025-01-10 01:03:25,679 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2025-01-10 01:03:25,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 0 states have call successors, (0), 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 01:03:25,680 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:25,680 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-01-10 01:03:25,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-10 01:03:25,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:25,885 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-01-10 01:03:25,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1103959183, now seen corresponding path program 2 times [2025-01-10 01:03:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:25,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902175287] [2025-01-10 01:03:25,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:25,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:25,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:03:25,922 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:03:25,923 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:25,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:03:26,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902175287] [2025-01-10 01:03:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902175287] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:26,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032340] [2025-01-10 01:03:26,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:03:26,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:26,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:26,308 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 01:03:26,310 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 01:03:26,377 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-01-10 01:03:26,414 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 01:03:26,415 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:03:26,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:26,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-01-10 01:03:26,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:26,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-01-10 01:03:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:03:26,549 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:03:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032340] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:26,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:26,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2025-01-10 01:03:26,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287611545] [2025-01-10 01:03:26,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:26,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 01:03:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:26,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 01:03:26,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:03:27,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2025-01-10 01:03:27,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 538 flow. Second operand has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 0 states have call successors, (0), 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 01:03:27,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:27,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2025-01-10 01:03:27,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 01:03:34,078 INFO L124 PetriNetUnfolderBase]: 49602/89452 cut-off events. [2025-01-10 01:03:34,079 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2025-01-10 01:03:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153379 conditions, 89452 events. 49602/89452 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 2262. Compared 854919 event pairs, 29461 based on Foata normal form. 6/71763 useless extension candidates. Maximal degree in co-relation 153261. Up to 63487 conditions per place. [2025-01-10 01:03:34,541 INFO L140 encePairwiseOnDemand]: 173/186 looper letters, 91 selfloop transitions, 34 changer transitions 0/210 dead transitions. [2025-01-10 01:03:34,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 824 flow [2025-01-10 01:03:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 01:03:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-01-10 01:03:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 959 transitions. [2025-01-10 01:03:34,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.572879330943847 [2025-01-10 01:03:34,544 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 9 states and 959 transitions. [2025-01-10 01:03:34,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 824 flow [2025-01-10 01:03:34,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 210 transitions, 738 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-01-10 01:03:34,549 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 550 flow [2025-01-10 01:03:34,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2025-01-10 01:03:34,549 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2025-01-10 01:03:34,549 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 550 flow [2025-01-10 01:03:34,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 0 states have call successors, (0), 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 01:03:34,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 01:03:34,550 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:03:34,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 01:03:34,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:34,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2025-01-10 01:03:34,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:03:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1788774639, now seen corresponding path program 1 times [2025-01-10 01:03:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:03:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771555660] [2025-01-10 01:03:34,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:34,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:03:34,768 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:03:34,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:03:34,782 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:34,782 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:03:34,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:03:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771555660] [2025-01-10 01:03:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771555660] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:03:34,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634295418] [2025-01-10 01:03:34,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:03:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:03:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:03:34,854 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 01:03:34,855 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 01:03:34,930 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-01-10 01:03:34,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-01-10 01:03:34,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:03:34,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:03:34,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:03:34,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:03:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:03:34,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:03:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:03:35,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634295418] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:03:35,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:03:35,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-01-10 01:03:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267047492] [2025-01-10 01:03:35,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:03:35,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 01:03:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:03:35,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 01:03:35,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:03:35,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2025-01-10 01:03:35,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 0 states have call successors, (0), 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 01:03:35,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 01:03:35,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2025-01-10 01:03:35,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand