./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:41:15,476 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:41:15,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:41:15,534 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:41:15,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:41:15,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:41:15,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:41:15,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:41:15,556 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:41:15,556 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:41:15,556 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:41:15,557 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:41:15,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:41:15,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:41:15,557 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:41:15,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:41:15,558 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:41:15,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:41:15,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:41:15,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:41:15,559 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:41:15,559 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:41:15,560 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:41:15,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:41:15,560 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:41:15,560 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:41:15,561 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:41:15,561 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:41:15,561 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:41:15,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:41:15,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:41:15,562 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:41:15,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:41:15,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:41:15,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:41:15,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:41:15,563 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:41:15,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:41:15,564 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:41:15,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:41:15,564 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:41:15,565 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:41:15,565 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2024-11-19 09:41:15,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:41:15,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:41:15,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:41:15,787 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:41:15,787 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:41:15,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-19 09:41:16,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:41:17,192 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:41:17,192 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2024-11-19 09:41:17,205 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd869d74/e06a43c47b354abe919c3c14bcc56b0e/FLAG9b0f4002c [2024-11-19 09:41:17,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd869d74/e06a43c47b354abe919c3c14bcc56b0e [2024-11-19 09:41:17,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:41:17,221 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:41:17,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:41:17,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:41:17,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:41:17,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,227 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b120221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17, skipping insertion in model container [2024-11-19 09:41:17,228 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,263 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:41:17,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:41:17,697 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:41:17,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:41:17,792 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:41:17,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17 WrapperNode [2024-11-19 09:41:17,793 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:41:17,794 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:41:17,794 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:41:17,794 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:41:17,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,844 INFO L138 Inliner]: procedures = 272, calls = 96, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 281 [2024-11-19 09:41:17,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:41:17,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:41:17,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:41:17,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:41:17,853 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,861 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,875 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 2, 70]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 0, 60]. The 5 writes are split as follows [0, 0, 1, 4]. [2024-11-19 09:41:17,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,894 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:41:17,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:41:17,894 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:41:17,894 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:41:17,895 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (1/1) ... [2024-11-19 09:41:17,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:41:17,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:17,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:41:17,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:41:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 09:41:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 09:41:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 09:41:17,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:41:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:41:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-19 09:41:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-19 09:41:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:41:17,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:41:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-19 09:41:17,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-19 09:41:17,979 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-19 09:41:17,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:41:17,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:41:17,981 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:41:18,125 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:41:18,127 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:41:18,499 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:41:18,499 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:41:18,879 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:41:18,879 INFO L316 CfgBuilder]: Removed 25 assume(true) statements. [2024-11-19 09:41:18,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:41:18 BoogieIcfgContainer [2024-11-19 09:41:18,880 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:41:18,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:41:18,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:41:18,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:41:18,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:41:17" (1/3) ... [2024-11-19 09:41:18,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec1b740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:41:18, skipping insertion in model container [2024-11-19 09:41:18,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:41:17" (2/3) ... [2024-11-19 09:41:18,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec1b740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:41:18, skipping insertion in model container [2024-11-19 09:41:18,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:41:18" (3/3) ... [2024-11-19 09:41:18,889 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2024-11-19 09:41:18,902 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:41:18,902 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-19 09:41:18,902 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:41:18,955 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-19 09:41:18,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 141 transitions, 289 flow [2024-11-19 09:41:19,036 INFO L124 PetriNetUnfolderBase]: 44/213 cut-off events. [2024-11-19 09:41:19,037 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:41:19,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218 conditions, 213 events. 44/213 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1021 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2024-11-19 09:41:19,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 141 transitions, 289 flow [2024-11-19 09:41:19,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 141 transitions, 289 flow [2024-11-19 09:41:19,058 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:41:19,064 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;@371fc9b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:41:19,065 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-19 09:41:19,068 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:41:19,069 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:41:19,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:41:19,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:19,070 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:41:19,070 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:19,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 22359306, now seen corresponding path program 1 times [2024-11-19 09:41:19,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128379881] [2024-11-19 09:41:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:19,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:19,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128379881] [2024-11-19 09:41:19,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128379881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:19,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:19,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896792427] [2024-11-19 09:41:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:19,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:19,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-19 09:41:19,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:19,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:19,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-19 09:41:19,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:19,693 INFO L124 PetriNetUnfolderBase]: 625/2072 cut-off events. [2024-11-19 09:41:19,693 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-11-19 09:41:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3265 conditions, 2072 events. 625/2072 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15912 event pairs, 525 based on Foata normal form. 394/2156 useless extension candidates. Maximal degree in co-relation 3159. Up to 1187 conditions per place. [2024-11-19 09:41:19,709 INFO L140 encePairwiseOnDemand]: 114/141 looper letters, 53 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-19 09:41:19,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 349 flow [2024-11-19 09:41:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-19 09:41:19,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217494089834515 [2024-11-19 09:41:19,723 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 289 flow. Second operand 3 states and 263 transitions. [2024-11-19 09:41:19,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 349 flow [2024-11-19 09:41:19,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 349 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:41:19,730 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2024-11-19 09:41:19,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2024-11-19 09:41:19,735 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-19 09:41:19,736 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2024-11-19 09:41:19,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:19,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:19,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:41:19,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:41:19,737 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:19,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash 693133463, now seen corresponding path program 1 times [2024-11-19 09:41:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:19,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707963021] [2024-11-19 09:41:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:19,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:19,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707963021] [2024-11-19 09:41:19,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707963021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:19,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676294305] [2024-11-19 09:41:19,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:19,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:19,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:19,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:19,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:41:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:19,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:41:19,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:19,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:19,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676294305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:19,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:19,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:41:19,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845491140] [2024-11-19 09:41:19,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:19,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:41:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:41:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:41:19,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-19 09:41:19,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:19,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:19,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-19 09:41:19,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:20,217 INFO L124 PetriNetUnfolderBase]: 625/2075 cut-off events. [2024-11-19 09:41:20,217 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2024-11-19 09:41:20,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 2075 events. 625/2075 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 15930 event pairs, 525 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 3269. Up to 1187 conditions per place. [2024-11-19 09:41:20,228 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-19 09:41:20,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 377 flow [2024-11-19 09:41:20,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:41:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:41:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 427 transitions. [2024-11-19 09:41:20,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5047281323877069 [2024-11-19 09:41:20,231 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 427 transitions. [2024-11-19 09:41:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 377 flow [2024-11-19 09:41:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 373 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:20,236 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2024-11-19 09:41:20,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2024-11-19 09:41:20,237 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-11-19 09:41:20,237 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2024-11-19 09:41:20,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.285714285714285) internal successors, (436), 7 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:20,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:20,237 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:20,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:41:20,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:20,439 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:20,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:20,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781557, now seen corresponding path program 2 times [2024-11-19 09:41:20,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:20,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178330523] [2024-11-19 09:41:20,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:20,467 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:41:20,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:41:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178330523] [2024-11-19 09:41:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178330523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:20,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:20,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425295377] [2024-11-19 09:41:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:20,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:20,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:20,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:20,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-11-19 09:41:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-11-19 09:41:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:20,785 INFO L124 PetriNetUnfolderBase]: 619/1982 cut-off events. [2024-11-19 09:41:20,785 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:41:20,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3212 conditions, 1982 events. 619/1982 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15582 event pairs, 0 based on Foata normal form. 1/1672 useless extension candidates. Maximal degree in co-relation 3178. Up to 1177 conditions per place. [2024-11-19 09:41:20,794 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-11-19 09:41:20,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 491 flow [2024-11-19 09:41:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-11-19 09:41:20,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146572104018913 [2024-11-19 09:41:20,796 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 3 states and 260 transitions. [2024-11-19 09:41:20,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 491 flow [2024-11-19 09:41:20,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 477 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:20,802 INFO L231 Difference]: Finished difference. Result has 124 places, 119 transitions, 277 flow [2024-11-19 09:41:20,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=124, PETRI_TRANSITIONS=119} [2024-11-19 09:41:20,804 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 10 predicate places. [2024-11-19 09:41:20,805 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 119 transitions, 277 flow [2024-11-19 09:41:20,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:20,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:20,805 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:20,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:41:20,805 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:20,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1068781558, now seen corresponding path program 1 times [2024-11-19 09:41:20,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:20,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439348066] [2024-11-19 09:41:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:41:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439348066] [2024-11-19 09:41:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439348066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:20,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283725372] [2024-11-19 09:41:20,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:20,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:20,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 141 [2024-11-19 09:41:20,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 119 transitions, 277 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:20,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:20,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 141 [2024-11-19 09:41:20,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:21,106 INFO L124 PetriNetUnfolderBase]: 666/2134 cut-off events. [2024-11-19 09:41:21,107 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-19 09:41:21,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 2134 events. 666/2134 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 16521 event pairs, 525 based on Foata normal form. 0/1866 useless extension candidates. Maximal degree in co-relation 3453. Up to 1160 conditions per place. [2024-11-19 09:41:21,116 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 80 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2024-11-19 09:41:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 139 transitions, 481 flow [2024-11-19 09:41:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:21,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2024-11-19 09:41:21,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2024-11-19 09:41:21,118 INFO L175 Difference]: Start difference. First operand has 124 places, 119 transitions, 277 flow. Second operand 3 states and 251 transitions. [2024-11-19 09:41:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 139 transitions, 481 flow [2024-11-19 09:41:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:41:21,121 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 273 flow [2024-11-19 09:41:21,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=273, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2024-11-19 09:41:21,122 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 8 predicate places. [2024-11-19 09:41:21,122 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 273 flow [2024-11-19 09:41:21,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:21,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:21,123 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:41:21,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:41:21,123 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:21,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1426733069, now seen corresponding path program 1 times [2024-11-19 09:41:21,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:21,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553442773] [2024-11-19 09:41:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:41:21,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:21,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553442773] [2024-11-19 09:41:21,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553442773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:21,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881098717] [2024-11-19 09:41:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:21,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:21,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:21,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:21,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:41:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:21,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:41:21,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:41:21,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:41:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881098717] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:21,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:21,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 09:41:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25700711] [2024-11-19 09:41:21,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:21,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:41:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:41:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:41:21,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 141 [2024-11-19 09:41:21,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:21,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:21,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 141 [2024-11-19 09:41:21,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:21,606 INFO L124 PetriNetUnfolderBase]: 622/2038 cut-off events. [2024-11-19 09:41:21,606 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-19 09:41:21,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3317 conditions, 2038 events. 622/2038 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 15534 event pairs, 525 based on Foata normal form. 6/1772 useless extension candidates. Maximal degree in co-relation 3264. Up to 1164 conditions per place. [2024-11-19 09:41:21,615 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 53 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-11-19 09:41:21,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 123 transitions, 437 flow [2024-11-19 09:41:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:41:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:41:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 802 transitions. [2024-11-19 09:41:21,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4739952718676123 [2024-11-19 09:41:21,618 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 273 flow. Second operand 12 states and 802 transitions. [2024-11-19 09:41:21,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 123 transitions, 437 flow [2024-11-19 09:41:21,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 123 transitions, 433 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:41:21,620 INFO L231 Difference]: Finished difference. Result has 137 places, 123 transitions, 353 flow [2024-11-19 09:41:21,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=353, PETRI_PLACES=137, PETRI_TRANSITIONS=123} [2024-11-19 09:41:21,621 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 23 predicate places. [2024-11-19 09:41:21,621 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 123 transitions, 353 flow [2024-11-19 09:41:21,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 62.30769230769231) internal successors, (810), 13 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:21,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:21,622 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:41:21,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:41:21,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:21,823 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:21,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash -258610035, now seen corresponding path program 2 times [2024-11-19 09:41:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:21,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33211055] [2024-11-19 09:41:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:21,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:41:21,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:21,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:21,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33211055] [2024-11-19 09:41:21,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33211055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:21,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095601955] [2024-11-19 09:41:21,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:21,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:21,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:21,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:41:22,059 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:41:22,060 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:22,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:41:22,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:22,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:41:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:22,162 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:41:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095601955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:22,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:41:22,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-19 09:41:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629859810] [2024-11-19 09:41:22,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:22,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:41:22,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:22,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:41:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:41:22,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 141 [2024-11-19 09:41:22,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 123 transitions, 353 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:22,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:22,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 141 [2024-11-19 09:41:22,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:22,512 INFO L124 PetriNetUnfolderBase]: 597/1898 cut-off events. [2024-11-19 09:41:22,512 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-19 09:41:22,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3171 conditions, 1898 events. 597/1898 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 14636 event pairs, 22 based on Foata normal form. 22/1684 useless extension candidates. Maximal degree in co-relation 3094. Up to 1051 conditions per place. [2024-11-19 09:41:22,523 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 127 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2024-11-19 09:41:22,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 745 flow [2024-11-19 09:41:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:41:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:41:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 422 transitions. [2024-11-19 09:41:22,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985815602836879 [2024-11-19 09:41:22,526 INFO L175 Difference]: Start difference. First operand has 137 places, 123 transitions, 353 flow. Second operand 5 states and 422 transitions. [2024-11-19 09:41:22,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 745 flow [2024-11-19 09:41:22,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 697 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 09:41:22,531 INFO L231 Difference]: Finished difference. Result has 136 places, 123 transitions, 316 flow [2024-11-19 09:41:22,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=316, PETRI_PLACES=136, PETRI_TRANSITIONS=123} [2024-11-19 09:41:22,532 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 22 predicate places. [2024-11-19 09:41:22,532 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 123 transitions, 316 flow [2024-11-19 09:41:22,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:22,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:22,533 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-11-19 09:41:22,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 09:41:22,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:22,734 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-19 09:41:22,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash 573024315, now seen corresponding path program 1 times [2024-11-19 09:41:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:22,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169594845] [2024-11-19 09:41:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:22,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:41:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:22,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:41:22,786 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:41:22,787 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-19 09:41:22,789 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-19 09:41:22,790 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-19 09:41:22,791 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-19 09:41:22,792 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-19 09:41:22,793 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-19 09:41:22,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-19 09:41:22,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-19 09:41:22,794 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-19 09:41:22,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:41:22,794 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-19 09:41:22,796 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:41:22,796 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 09:41:22,826 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:41:22,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 204 transitions, 424 flow [2024-11-19 09:41:22,848 INFO L124 PetriNetUnfolderBase]: 74/360 cut-off events. [2024-11-19 09:41:22,848 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:41:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 360 events. 74/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2070 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 215. Up to 12 conditions per place. [2024-11-19 09:41:22,851 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 204 transitions, 424 flow [2024-11-19 09:41:22,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 204 transitions, 424 flow [2024-11-19 09:41:22,855 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:41:22,856 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;@371fc9b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:41:22,856 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-19 09:41:22,857 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:41:22,857 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:41:22,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:41:22,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:22,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:41:22,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:22,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 28639242, now seen corresponding path program 1 times [2024-11-19 09:41:22,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:22,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843196039] [2024-11-19 09:41:22,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:22,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:22,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:22,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843196039] [2024-11-19 09:41:22,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843196039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:22,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:22,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:22,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801974568] [2024-11-19 09:41:22,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:22,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:22,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:22,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:22,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-19 09:41:22,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:22,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:22,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-19 09:41:22,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:26,704 INFO L124 PetriNetUnfolderBase]: 27581/60837 cut-off events. [2024-11-19 09:41:26,705 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-11-19 09:41:26,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100897 conditions, 60837 events. 27581/60837 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679650 event pairs, 24192 based on Foata normal form. 13675/66308 useless extension candidates. Maximal degree in co-relation 93084. Up to 39942 conditions per place. [2024-11-19 09:41:27,047 INFO L140 encePairwiseOnDemand]: 165/204 looper letters, 77 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-11-19 09:41:27,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 506 flow [2024-11-19 09:41:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-19 09:41:27,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160130718954249 [2024-11-19 09:41:27,050 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 424 flow. Second operand 3 states and 377 transitions. [2024-11-19 09:41:27,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 506 flow [2024-11-19 09:41:27,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:41:27,052 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 358 flow [2024-11-19 09:41:27,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2024-11-19 09:41:27,054 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 0 predicate places. [2024-11-19 09:41:27,054 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 358 flow [2024-11-19 09:41:27,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:27,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:27,054 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 09:41:27,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:41:27,055 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:27,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash 887811682, now seen corresponding path program 1 times [2024-11-19 09:41:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386552077] [2024-11-19 09:41:27,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:27,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386552077] [2024-11-19 09:41:27,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386552077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:27,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315832107] [2024-11-19 09:41:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:27,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:27,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:27,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:27,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:41:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:27,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:41:27,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:27,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:27,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315832107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:27,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:27,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:41:27,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692952645] [2024-11-19 09:41:27,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:27,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:41:27,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:41:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:41:27,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-19 09:41:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 358 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-19 09:41:27,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:30,756 INFO L124 PetriNetUnfolderBase]: 27581/60840 cut-off events. [2024-11-19 09:41:30,756 INFO L125 PetriNetUnfolderBase]: For 200/205 co-relation queries the response was YES. [2024-11-19 09:41:30,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100913 conditions, 60840 events. 27581/60840 cut-off events. For 200/205 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679806 event pairs, 24192 based on Foata normal form. 0/52636 useless extension candidates. Maximal degree in co-relation 100900. Up to 39942 conditions per place. [2024-11-19 09:41:31,080 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2024-11-19 09:41:31,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 169 transitions, 534 flow [2024-11-19 09:41:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:41:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:41:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 607 transitions. [2024-11-19 09:41:31,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4959150326797386 [2024-11-19 09:41:31,083 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 358 flow. Second operand 6 states and 607 transitions. [2024-11-19 09:41:31,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 169 transitions, 534 flow [2024-11-19 09:41:31,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 169 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:31,085 INFO L231 Difference]: Finished difference. Result has 171 places, 169 transitions, 390 flow [2024-11-19 09:41:31,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=390, PETRI_PLACES=171, PETRI_TRANSITIONS=169} [2024-11-19 09:41:31,086 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 7 predicate places. [2024-11-19 09:41:31,086 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 169 transitions, 390 flow [2024-11-19 09:41:31,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:31,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:31,087 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:31,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:41:31,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:31,288 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:31,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:31,288 INFO L85 PathProgramCache]: Analyzing trace with hash 384423434, now seen corresponding path program 2 times [2024-11-19 09:41:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:31,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060068642] [2024-11-19 09:41:31,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:31,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:31,301 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:41:31,302 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:41:31,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:31,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060068642] [2024-11-19 09:41:31,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060068642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:31,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:31,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:31,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516145098] [2024-11-19 09:41:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:31,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:31,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:31,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:31,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2024-11-19 09:41:31,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 169 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:31,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:31,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2024-11-19 09:41:31,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:35,289 INFO L124 PetriNetUnfolderBase]: 29604/64368 cut-off events. [2024-11-19 09:41:35,289 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2024-11-19 09:41:35,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107514 conditions, 64368 events. 29604/64368 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 1770. Compared 719455 event pairs, 24171 based on Foata normal form. 0/55924 useless extension candidates. Maximal degree in co-relation 107479. Up to 39895 conditions per place. [2024-11-19 09:41:35,686 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 126 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-11-19 09:41:35,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 730 flow [2024-11-19 09:41:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2024-11-19 09:41:35,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-11-19 09:41:35,688 INFO L175 Difference]: Start difference. First operand has 171 places, 169 transitions, 390 flow. Second operand 3 states and 375 transitions. [2024-11-19 09:41:35,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 730 flow [2024-11-19 09:41:35,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 211 transitions, 716 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:35,691 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 376 flow [2024-11-19 09:41:35,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2024-11-19 09:41:35,692 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 6 predicate places. [2024-11-19 09:41:35,692 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 376 flow [2024-11-19 09:41:35,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:35,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:35,692 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-19 09:41:35,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:41:35,692 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:35,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash 384423435, now seen corresponding path program 1 times [2024-11-19 09:41:35,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:35,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197171065] [2024-11-19 09:41:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:35,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:35,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:35,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197171065] [2024-11-19 09:41:35,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197171065] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:35,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519688520] [2024-11-19 09:41:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:35,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:35,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:35,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:41:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:35,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:41:35,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:35,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519688520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:35,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:35,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-19 09:41:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222954751] [2024-11-19 09:41:35,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:35,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:41:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:35,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:41:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:41:35,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 204 [2024-11-19 09:41:35,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:35,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:35,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 204 [2024-11-19 09:41:35,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:40,096 INFO L124 PetriNetUnfolderBase]: 27581/60830 cut-off events. [2024-11-19 09:41:40,097 INFO L125 PetriNetUnfolderBase]: For 765/770 co-relation queries the response was YES. [2024-11-19 09:41:40,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101458 conditions, 60830 events. 27581/60830 cut-off events. For 765/770 co-relation queries the response was YES. Maximal size of possible extension queue 1685. Compared 679501 event pairs, 24192 based on Foata normal form. 6/52649 useless extension candidates. Maximal degree in co-relation 101405. Up to 39942 conditions per place. [2024-11-19 09:41:40,507 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 77 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-11-19 09:41:40,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 173 transitions, 588 flow [2024-11-19 09:41:40,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:41:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:41:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1138 transitions. [2024-11-19 09:41:40,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46486928104575165 [2024-11-19 09:41:40,511 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 376 flow. Second operand 12 states and 1138 transitions. [2024-11-19 09:41:40,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 173 transitions, 588 flow [2024-11-19 09:41:40,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 173 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:41:40,516 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 456 flow [2024-11-19 09:41:40,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-11-19 09:41:40,516 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2024-11-19 09:41:40,516 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 456 flow [2024-11-19 09:41:40,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:40,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:40,517 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-19 09:41:40,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:41:40,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 09:41:40,721 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:40,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:40,722 INFO L85 PathProgramCache]: Analyzing trace with hash -679053557, now seen corresponding path program 2 times [2024-11-19 09:41:40,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:40,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570379087] [2024-11-19 09:41:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:41:40,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:40,739 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:41:40,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:41:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:40,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:40,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570379087] [2024-11-19 09:41:40,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570379087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:40,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:40,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:40,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637307469] [2024-11-19 09:41:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:40,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:40,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 204 [2024-11-19 09:41:40,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 173 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:40,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:40,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 204 [2024-11-19 09:41:40,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:45,054 INFO L124 PetriNetUnfolderBase]: 27992/60918 cut-off events. [2024-11-19 09:41:45,055 INFO L125 PetriNetUnfolderBase]: For 280/324 co-relation queries the response was YES. [2024-11-19 09:41:45,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102013 conditions, 60918 events. 27992/60918 cut-off events. For 280/324 co-relation queries the response was YES. Maximal size of possible extension queue 1737. Compared 681222 event pairs, 12096 based on Foata normal form. 1/52872 useless extension candidates. Maximal degree in co-relation 101936. Up to 40894 conditions per place. [2024-11-19 09:41:45,652 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 111 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2024-11-19 09:41:45,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 197 transitions, 730 flow [2024-11-19 09:41:45,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:41:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:41:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2024-11-19 09:41:45,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5931372549019608 [2024-11-19 09:41:45,653 INFO L175 Difference]: Start difference. First operand has 185 places, 173 transitions, 456 flow. Second operand 3 states and 363 transitions. [2024-11-19 09:41:45,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 197 transitions, 730 flow [2024-11-19 09:41:45,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 197 transitions, 682 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-19 09:41:45,657 INFO L231 Difference]: Finished difference. Result has 183 places, 174 transitions, 422 flow [2024-11-19 09:41:45,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2024-11-19 09:41:45,658 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 19 predicate places. [2024-11-19 09:41:45,658 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 422 flow [2024-11-19 09:41:45,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:45,658 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:45,659 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:41:45,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:41:45,659 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:45,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 872746160, now seen corresponding path program 1 times [2024-11-19 09:41:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:45,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052682572] [2024-11-19 09:41:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:45,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:45,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052682572] [2024-11-19 09:41:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052682572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:41:45,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750861261] [2024-11-19 09:41:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:45,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:41:45,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:41:45,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:41:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:45,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:41:45,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:41:45,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:41:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:45,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:41:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-19 09:41:45,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750861261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:41:45,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:41:45,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-19 09:41:45,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944173548] [2024-11-19 09:41:45,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:41:45,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:41:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:41:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:41:46,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2024-11-19 09:41:46,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 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) [2024-11-19 09:41:46,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:46,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2024-11-19 09:41:46,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:41:50,065 INFO L124 PetriNetUnfolderBase]: 27001/56866 cut-off events. [2024-11-19 09:41:50,065 INFO L125 PetriNetUnfolderBase]: For 1565/1565 co-relation queries the response was YES. [2024-11-19 09:41:50,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97797 conditions, 56866 events. 27001/56866 cut-off events. For 1565/1565 co-relation queries the response was YES. Maximal size of possible extension queue 1679. Compared 622244 event pairs, 981 based on Foata normal form. 528/50470 useless extension candidates. Maximal degree in co-relation 97743. Up to 34250 conditions per place. [2024-11-19 09:41:50,497 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 200 selfloop transitions, 4 changer transitions 0/287 dead transitions. [2024-11-19 09:41:50,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 287 transitions, 1054 flow [2024-11-19 09:41:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:41:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:41:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2024-11-19 09:41:50,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6098039215686275 [2024-11-19 09:41:50,499 INFO L175 Difference]: Start difference. First operand has 183 places, 174 transitions, 422 flow. Second operand 5 states and 622 transitions. [2024-11-19 09:41:50,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 287 transitions, 1054 flow [2024-11-19 09:41:50,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 287 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:41:50,506 INFO L231 Difference]: Finished difference. Result has 185 places, 173 transitions, 424 flow [2024-11-19 09:41:50,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=185, PETRI_TRANSITIONS=173} [2024-11-19 09:41:50,507 INFO L277 CegarLoopForPetriNet]: 164 programPoint places, 21 predicate places. [2024-11-19 09:41:50,507 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 173 transitions, 424 flow [2024-11-19 09:41:50,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 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) [2024-11-19 09:41:50,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:50,508 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1] [2024-11-19 09:41:50,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:41:50,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:41:50,709 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-19 09:41:50,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1787874941, now seen corresponding path program 1 times [2024-11-19 09:41:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:50,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609252869] [2024-11-19 09:41:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:50,740 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 09:41:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 09:41:50,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 09:41:50,769 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 09:41:50,769 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (44 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-19 09:41:50,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-19 09:41:50,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-19 09:41:50,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-19 09:41:50,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-19 09:41:50,774 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-19 09:41:50,775 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-19 09:41:50,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:41:50,775 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-19 09:41:50,775 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 09:41:50,775 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 09:41:50,812 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:41:50,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 267 transitions, 561 flow [2024-11-19 09:41:50,846 INFO L124 PetriNetUnfolderBase]: 107/528 cut-off events. [2024-11-19 09:41:50,847 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 09:41:50,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 528 events. 107/528 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3258 event pairs, 1 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2024-11-19 09:41:50,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 267 transitions, 561 flow [2024-11-19 09:41:50,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 267 transitions, 561 flow [2024-11-19 09:41:50,858 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:41:50,858 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;@371fc9b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:41:50,858 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-19 09:41:50,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:41:50,861 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-19 09:41:50,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:41:50,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:41:50,862 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:41:50,862 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-19 09:41:50,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:41:50,862 INFO L85 PathProgramCache]: Analyzing trace with hash 36858570, now seen corresponding path program 1 times [2024-11-19 09:41:50,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:41:50,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660804273] [2024-11-19 09:41:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:41:50,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:41:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:41:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:41:50,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:41:50,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660804273] [2024-11-19 09:41:50,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660804273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:41:50,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:41:50,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:41:50,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868227856] [2024-11-19 09:41:50,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:41:50,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:41:50,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:41:50,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:41:50,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:41:50,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 267 [2024-11-19 09:41:50,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:41:50,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:41:50,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 267 [2024-11-19 09:41:50,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand