./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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/weaver/chl-array-int-subst.wvr.c -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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:21:42,368 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:21:42,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:21:42,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:21:42,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:21:42,509 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:21:42,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:21:42,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:21:42,511 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:21:42,511 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:21:42,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:21:42,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:21:42,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:21:42,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:21:42,513 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:21:42,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:21:42,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:21:42,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:21:42,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:21:42,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:21:42,515 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:21:42,515 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:21:42,519 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:21:42,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:21:42,519 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:21:42,519 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:21:42,520 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:21:42,520 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:21:42,520 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:21:42,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:21:42,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:21:42,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:21:42,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:21:42,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:21:42,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:21:42,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:21:42,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:21:42,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:21:42,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:21:42,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:21:42,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:21:42,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:21:42,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2024-11-12 16:21:42,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:21:42,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:21:42,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:21:42,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:21:42,836 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:21:42,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-12 16:21:44,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:21:44,541 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:21:44,541 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2024-11-12 16:21:44,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a016822/9fc93047e0754aa6bd2d295fd0e6cd45/FLAG5a57c4e32 [2024-11-12 16:21:44,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a016822/9fc93047e0754aa6bd2d295fd0e6cd45 [2024-11-12 16:21:44,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:21:44,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:21:44,568 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:21:44,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:21:44,574 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:21:44,574 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cad34a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44, skipping insertion in model container [2024-11-12 16:21:44,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,605 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:21:44,869 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:21:44,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:21:44,888 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:21:44,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:21:44,929 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:21:44,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44 WrapperNode [2024-11-12 16:21:44,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:21:44,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:21:44,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:21:44,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:21:44,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,945 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,974 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 276 [2024-11-12 16:21:44,975 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:21:44,975 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:21:44,975 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:21:44,976 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:21:44,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:44,992 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,012 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-12 16:21:45,012 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,012 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,026 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,034 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,043 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:21:45,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:21:45,044 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:21:45,044 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:21:45,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (1/1) ... [2024-11-12 16:21:45,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:21:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:45,083 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) [2024-11-12 16:21:45,087 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 [2024-11-12 16:21:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:21:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:21:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:21:45,144 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:21:45,144 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:21:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:21:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:21:45,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:21:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:21:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:21:45,150 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:21:45,280 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:21:45,282 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:21:45,820 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:21:45,820 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:21:46,281 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:21:46,281 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 16:21:46,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:21:46 BoogieIcfgContainer [2024-11-12 16:21:46,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:21:46,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:21:46,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:21:46,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:21:46,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:21:44" (1/3) ... [2024-11-12 16:21:46,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5052ec6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:21:46, skipping insertion in model container [2024-11-12 16:21:46,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:21:44" (2/3) ... [2024-11-12 16:21:46,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5052ec6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:21:46, skipping insertion in model container [2024-11-12 16:21:46,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:21:46" (3/3) ... [2024-11-12 16:21:46,306 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-11-12 16:21:46,334 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:21:46,334 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-12 16:21:46,335 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:21:46,422 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:21:46,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 195 flow [2024-11-12 16:21:46,561 INFO L124 PetriNetUnfolderBase]: 9/84 cut-off events. [2024-11-12 16:21:46,562 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:21:46,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 9/84 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 272 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-12 16:21:46,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 195 flow [2024-11-12 16:21:46,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 184 flow [2024-11-12 16:21:46,584 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:21:46,591 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;@1d253819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:21:46,591 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-12 16:21:46,595 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:21:46,596 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:21:46,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:21:46,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:46,598 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:21:46,598 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:46,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:46,606 INFO L85 PathProgramCache]: Analyzing trace with hash 884889, now seen corresponding path program 1 times [2024-11-12 16:21:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23029873] [2024-11-12 16:21:46,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:46,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:46,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23029873] [2024-11-12 16:21:46,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23029873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:46,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:46,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:21:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629913980] [2024-11-12 16:21:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:46,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:21:46,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:21:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:21:47,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-12 16:21:47,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:47,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:47,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:47,480 INFO L124 PetriNetUnfolderBase]: 977/1690 cut-off events. [2024-11-12 16:21:47,481 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-12 16:21:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1690 events. 977/1690 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9349 event pairs, 608 based on Foata normal form. 1/1197 useless extension candidates. Maximal degree in co-relation 2854. Up to 1318 conditions per place. [2024-11-12 16:21:47,504 INFO L140 encePairwiseOnDemand]: 81/87 looper letters, 36 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-12 16:21:47,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 250 flow [2024-11-12 16:21:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:21:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:21:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-11-12 16:21:47,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-12 16:21:47,522 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 184 flow. Second operand 3 states and 174 transitions. [2024-11-12 16:21:47,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 250 flow [2024-11-12 16:21:47,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 238 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:21:47,545 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-12 16:21:47,547 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-12 16:21:47,550 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2024-11-12 16:21:47,550 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-12 16:21:47,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-11-12 16:21:47,551 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:47,551 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:21:47,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:21:47,551 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:47,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash 884890, now seen corresponding path program 1 times [2024-11-12 16:21:47,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:47,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899418111] [2024-11-12 16:21:47,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:47,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899418111] [2024-11-12 16:21:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899418111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:47,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:21:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628652970] [2024-11-12 16:21:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:47,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:21:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:21:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:21:47,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:47,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-11-12 16:21:47,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:47,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:47,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:48,191 INFO L124 PetriNetUnfolderBase]: 978/1693 cut-off events. [2024-11-12 16:21:48,191 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-12 16:21:48,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3061 conditions, 1693 events. 978/1693 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9360 event pairs, 608 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 3024. Up to 1331 conditions per place. [2024-11-12 16:21:48,204 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 40 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2024-11-12 16:21:48,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 260 flow [2024-11-12 16:21:48,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:21:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:21:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-12 16:21:48,208 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6350574712643678 [2024-11-12 16:21:48,208 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 221 transitions. [2024-11-12 16:21:48,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 260 flow [2024-11-12 16:21:48,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:21:48,212 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 189 flow [2024-11-12 16:21:48,212 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-11-12 16:21:48,213 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -6 predicate places. [2024-11-12 16:21:48,213 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 189 flow [2024-11-12 16:21:48,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-11-12 16:21:48,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:48,214 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:21:48,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:21:48,215 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:48,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:48,216 INFO L85 PathProgramCache]: Analyzing trace with hash 27433156, now seen corresponding path program 1 times [2024-11-12 16:21:48,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:48,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012511145] [2024-11-12 16:21:48,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:48,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:48,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012511145] [2024-11-12 16:21:48,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012511145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:48,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:48,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:21:48,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053696825] [2024-11-12 16:21:48,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:48,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:48,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:48,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:48,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:48,697 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:48,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2024-11-12 16:21:48,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:48,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:48,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:48,959 INFO L124 PetriNetUnfolderBase]: 979/1696 cut-off events. [2024-11-12 16:21:48,960 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-12 16:21:48,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 1696 events. 979/1696 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9374 event pairs, 608 based on Foata normal form. 0/1198 useless extension candidates. Maximal degree in co-relation 3053. Up to 1330 conditions per place. [2024-11-12 16:21:48,974 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-12 16:21:48,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 289 flow [2024-11-12 16:21:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:21:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:21:48,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-12 16:21:48,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6160919540229886 [2024-11-12 16:21:48,980 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 189 flow. Second operand 5 states and 268 transitions. [2024-11-12 16:21:48,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 289 flow [2024-11-12 16:21:48,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:21:48,985 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 223 flow [2024-11-12 16:21:48,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-11-12 16:21:48,986 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2024-11-12 16:21:48,986 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 223 flow [2024-11-12 16:21:48,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2024-11-12 16:21:48,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:48,987 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:21:48,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:21:48,987 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:48,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 850407929, now seen corresponding path program 1 times [2024-11-12 16:21:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:48,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983877664] [2024-11-12 16:21:48,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:49,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:49,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983877664] [2024-11-12 16:21:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983877664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:49,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670701985] [2024-11-12 16:21:49,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:49,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:49,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:49,224 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) [2024-11-12 16:21:49,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:21:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:49,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:21:49,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:49,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:21:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:49,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670701985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:49,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:49,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:21:49,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152206155] [2024-11-12 16:21:49,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:49,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:21:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:21:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:21:50,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:50,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 223 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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) [2024-11-12 16:21:50,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:50,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:50,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:50,639 INFO L124 PetriNetUnfolderBase]: 980/1698 cut-off events. [2024-11-12 16:21:50,640 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 16:21:50,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3101 conditions, 1698 events. 980/1698 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9312 event pairs, 608 based on Foata normal form. 0/1203 useless extension candidates. Maximal degree in co-relation 3063. Up to 1331 conditions per place. [2024-11-12 16:21:50,654 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 39 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-11-12 16:21:50,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 332 flow [2024-11-12 16:21:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:21:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:21:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 400 transitions. [2024-11-12 16:21:50,657 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-11-12 16:21:50,657 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 223 flow. Second operand 8 states and 400 transitions. [2024-11-12 16:21:50,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 332 flow [2024-11-12 16:21:50,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:21:50,662 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 253 flow [2024-11-12 16:21:50,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=253, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-12 16:21:50,664 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 4 predicate places. [2024-11-12 16:21:50,664 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 253 flow [2024-11-12 16:21:50,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 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) [2024-11-12 16:21:50,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:50,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-12 16:21:50,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:21:50,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:50,870 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:50,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 850430064, now seen corresponding path program 1 times [2024-11-12 16:21:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509667668] [2024-11-12 16:21:50,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:51,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509667668] [2024-11-12 16:21:51,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509667668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:51,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:51,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:21:51,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836727554] [2024-11-12 16:21:51,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:51,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:51,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:51,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:51,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:51,247 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:51,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:21:51,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:51,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:51,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:51,527 INFO L124 PetriNetUnfolderBase]: 981/1701 cut-off events. [2024-11-12 16:21:51,527 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 16:21:51,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 1701 events. 981/1701 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9341 event pairs, 608 based on Foata normal form. 0/1205 useless extension candidates. Maximal degree in co-relation 3071. Up to 1335 conditions per place. [2024-11-12 16:21:51,540 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 43 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-12 16:21:51,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 363 flow [2024-11-12 16:21:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:21:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:21:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-12 16:21:51,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-12 16:21:51,542 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 253 flow. Second operand 5 states and 267 transitions. [2024-11-12 16:21:51,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 363 flow [2024-11-12 16:21:51,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 89 transitions, 316 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-12 16:21:51,549 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 249 flow [2024-11-12 16:21:51,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-11-12 16:21:51,550 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 2 predicate places. [2024-11-12 16:21:51,553 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 249 flow [2024-11-12 16:21:51,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:21:51,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:51,553 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:21:51,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:21:51,553 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:51,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:51,554 INFO L85 PathProgramCache]: Analyzing trace with hash 593487459, now seen corresponding path program 1 times [2024-11-12 16:21:51,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:51,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691984980] [2024-11-12 16:21:51,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:51,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691984980] [2024-11-12 16:21:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691984980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338606533] [2024-11-12 16:21:51,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:51,723 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) [2024-11-12 16:21:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:21:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:51,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:21:51,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:51,900 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 [2024-11-12 16:21:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:52,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:52,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338606533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:52,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:52,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:21:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897870465] [2024-11-12 16:21:52,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:52,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:21:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:21:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:21:52,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:52,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 249 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-12 16:21:52,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:52,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:52,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:53,425 INFO L124 PetriNetUnfolderBase]: 982/1703 cut-off events. [2024-11-12 16:21:53,425 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-12 16:21:53,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3119 conditions, 1703 events. 982/1703 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9367 event pairs, 608 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3067. Up to 1326 conditions per place. [2024-11-12 16:21:53,438 INFO L140 encePairwiseOnDemand]: 79/87 looper letters, 36 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-11-12 16:21:53,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 368 flow [2024-11-12 16:21:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:21:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:21:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 449 transitions. [2024-11-12 16:21:53,440 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5734355044699873 [2024-11-12 16:21:53,440 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 249 flow. Second operand 9 states and 449 transitions. [2024-11-12 16:21:53,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 368 flow [2024-11-12 16:21:53,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:21:53,443 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 288 flow [2024-11-12 16:21:53,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=288, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-11-12 16:21:53,444 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 7 predicate places. [2024-11-12 16:21:53,444 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 288 flow [2024-11-12 16:21:53,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-11-12 16:21:53,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:53,445 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:21:53,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:21:53,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 16:21:53,649 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:53,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:53,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1219533935, now seen corresponding path program 1 times [2024-11-12 16:21:53,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:53,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060304145] [2024-11-12 16:21:53,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:53,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060304145] [2024-11-12 16:21:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060304145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41352979] [2024-11-12 16:21:53,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:53,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:53,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:53,861 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) [2024-11-12 16:21:53,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:21:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:53,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:21:53,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:54,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-12 16:21:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:54,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:54,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41352979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:54,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:54,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:21:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707323317] [2024-11-12 16:21:54,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:54,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:21:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:21:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:21:55,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:21:55,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-11-12 16:21:55,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:55,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:21:55,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:55,521 INFO L124 PetriNetUnfolderBase]: 983/1705 cut-off events. [2024-11-12 16:21:55,521 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-12 16:21:55,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 1705 events. 983/1705 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9354 event pairs, 608 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 3075. Up to 1328 conditions per place. [2024-11-12 16:21:55,530 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 34 selfloop transitions, 22 changer transitions 0/93 dead transitions. [2024-11-12 16:21:55,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 408 flow [2024-11-12 16:21:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:21:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:21:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 448 transitions. [2024-11-12 16:21:55,534 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5721583652618135 [2024-11-12 16:21:55,534 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 288 flow. Second operand 9 states and 448 transitions. [2024-11-12 16:21:55,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 408 flow [2024-11-12 16:21:55,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 93 transitions, 375 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-12 16:21:55,536 INFO L231 Difference]: Finished difference. Result has 93 places, 93 transitions, 307 flow [2024-11-12 16:21:55,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=307, PETRI_PLACES=93, PETRI_TRANSITIONS=93} [2024-11-12 16:21:55,537 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 9 predicate places. [2024-11-12 16:21:55,537 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 93 transitions, 307 flow [2024-11-12 16:21:55,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-11-12 16:21:55,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:55,538 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:55,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:21:55,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:55,743 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:55,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:55,744 INFO L85 PathProgramCache]: Analyzing trace with hash -844348422, now seen corresponding path program 1 times [2024-11-12 16:21:55,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:55,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715198469] [2024-11-12 16:21:55,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:55,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715198469] [2024-11-12 16:21:55,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715198469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:55,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:55,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:21:55,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392764583] [2024-11-12 16:21:55,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:55,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:55,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:55,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:55,838 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:21:55,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 93 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:21:55,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:55,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:21:55,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:56,171 INFO L124 PetriNetUnfolderBase]: 1838/3069 cut-off events. [2024-11-12 16:21:56,171 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 16:21:56,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5782 conditions, 3069 events. 1838/3069 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18265 event pairs, 797 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 3634. Up to 1573 conditions per place. [2024-11-12 16:21:56,190 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 108 selfloop transitions, 9 changer transitions 0/153 dead transitions. [2024-11-12 16:21:56,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 153 transitions, 737 flow [2024-11-12 16:21:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:21:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:21:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 373 transitions. [2024-11-12 16:21:56,192 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145593869731801 [2024-11-12 16:21:56,192 INFO L175 Difference]: Start difference. First operand has 93 places, 93 transitions, 307 flow. Second operand 6 states and 373 transitions. [2024-11-12 16:21:56,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 153 transitions, 737 flow [2024-11-12 16:21:56,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 153 transitions, 659 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-12 16:21:56,195 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 329 flow [2024-11-12 16:21:56,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-12 16:21:56,196 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2024-11-12 16:21:56,196 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 329 flow [2024-11-12 16:21:56,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:21:56,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:56,197 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:56,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:21:56,197 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:56,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:56,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1674799621, now seen corresponding path program 1 times [2024-11-12 16:21:56,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:56,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069894021] [2024-11-12 16:21:56,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:56,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:56,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:56,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069894021] [2024-11-12 16:21:56,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069894021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:56,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:56,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:21:56,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856267185] [2024-11-12 16:21:56,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:56,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:56,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:21:56,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-12 16:21:56,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:56,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:21:56,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:56,761 INFO L124 PetriNetUnfolderBase]: 3204/5372 cut-off events. [2024-11-12 16:21:56,762 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2024-11-12 16:21:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10506 conditions, 5372 events. 3204/5372 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35149 event pairs, 1344 based on Foata normal form. 62/4134 useless extension candidates. Maximal degree in co-relation 5911. Up to 2548 conditions per place. [2024-11-12 16:21:56,795 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 105 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2024-11-12 16:21:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 153 transitions, 715 flow [2024-11-12 16:21:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:21:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:21:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 367 transitions. [2024-11-12 16:21:56,797 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7030651340996169 [2024-11-12 16:21:56,797 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 329 flow. Second operand 6 states and 367 transitions. [2024-11-12 16:21:56,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 153 transitions, 715 flow [2024-11-12 16:21:56,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 710 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:21:56,802 INFO L231 Difference]: Finished difference. Result has 101 places, 105 transitions, 411 flow [2024-11-12 16:21:56,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=101, PETRI_TRANSITIONS=105} [2024-11-12 16:21:56,802 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 17 predicate places. [2024-11-12 16:21:56,803 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 105 transitions, 411 flow [2024-11-12 16:21:56,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-12 16:21:56,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:56,803 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:56,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:21:56,803 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:56,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 260525993, now seen corresponding path program 1 times [2024-11-12 16:21:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796285142] [2024-11-12 16:21:56,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:56,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:21:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796285142] [2024-11-12 16:21:56,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796285142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:56,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:21:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252904152] [2024-11-12 16:21:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:56,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:56,910 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:21:56,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 105 transitions, 411 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-12 16:21:56,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:56,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:21:56,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:57,395 INFO L124 PetriNetUnfolderBase]: 2878/5127 cut-off events. [2024-11-12 16:21:57,395 INFO L125 PetriNetUnfolderBase]: For 1549/1549 co-relation queries the response was YES. [2024-11-12 16:21:57,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10198 conditions, 5127 events. 2878/5127 cut-off events. For 1549/1549 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35024 event pairs, 1446 based on Foata normal form. 0/3747 useless extension candidates. Maximal degree in co-relation 6451. Up to 2731 conditions per place. [2024-11-12 16:21:57,419 INFO L140 encePairwiseOnDemand]: 78/87 looper letters, 106 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-11-12 16:21:57,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 791 flow [2024-11-12 16:21:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:21:57,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:21:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2024-11-12 16:21:57,421 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-12 16:21:57,421 INFO L175 Difference]: Start difference. First operand has 101 places, 105 transitions, 411 flow. Second operand 6 states and 366 transitions. [2024-11-12 16:21:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 791 flow [2024-11-12 16:21:57,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:21:57,425 INFO L231 Difference]: Finished difference. Result has 107 places, 106 transitions, 443 flow [2024-11-12 16:21:57,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=107, PETRI_TRANSITIONS=106} [2024-11-12 16:21:57,427 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 23 predicate places. [2024-11-12 16:21:57,428 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 106 transitions, 443 flow [2024-11-12 16:21:57,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-12 16:21:57,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:57,431 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:57,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:21:57,431 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:57,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:57,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1164351629, now seen corresponding path program 1 times [2024-11-12 16:21:57,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:57,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558420025] [2024-11-12 16:21:57,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:57,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:57,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558420025] [2024-11-12 16:21:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558420025] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:57,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:21:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682122099] [2024-11-12 16:21:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:57,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:57,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:21:57,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-12 16:21:57,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:57,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:21:57,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:58,106 INFO L124 PetriNetUnfolderBase]: 2458/5096 cut-off events. [2024-11-12 16:21:58,106 INFO L125 PetriNetUnfolderBase]: For 1856/1856 co-relation queries the response was YES. [2024-11-12 16:21:58,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9938 conditions, 5096 events. 2458/5096 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39316 event pairs, 1378 based on Foata normal form. 0/3673 useless extension candidates. Maximal degree in co-relation 6282. Up to 2357 conditions per place. [2024-11-12 16:21:58,136 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 102 selfloop transitions, 11 changer transitions 0/149 dead transitions. [2024-11-12 16:21:58,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 149 transitions, 801 flow [2024-11-12 16:21:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:21:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:21:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 359 transitions. [2024-11-12 16:21:58,138 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6877394636015326 [2024-11-12 16:21:58,138 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 443 flow. Second operand 6 states and 359 transitions. [2024-11-12 16:21:58,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 149 transitions, 801 flow [2024-11-12 16:21:58,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 149 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:21:58,145 INFO L231 Difference]: Finished difference. Result has 111 places, 107 transitions, 464 flow [2024-11-12 16:21:58,145 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=111, PETRI_TRANSITIONS=107} [2024-11-12 16:21:58,146 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 27 predicate places. [2024-11-12 16:21:58,146 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 107 transitions, 464 flow [2024-11-12 16:21:58,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-12 16:21:58,146 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:58,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:58,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:21:58,146 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:58,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1060840809, now seen corresponding path program 1 times [2024-11-12 16:21:58,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:58,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66830988] [2024-11-12 16:21:58,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:58,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66830988] [2024-11-12 16:21:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66830988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:58,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:58,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:21:58,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119326528] [2024-11-12 16:21:58,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:58,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:58,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:58,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:58,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:58,266 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:21:58,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-12 16:21:58,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:21:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:59,214 INFO L124 PetriNetUnfolderBase]: 4218/8442 cut-off events. [2024-11-12 16:21:59,214 INFO L125 PetriNetUnfolderBase]: For 4142/4142 co-relation queries the response was YES. [2024-11-12 16:21:59,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17613 conditions, 8442 events. 4218/8442 cut-off events. For 4142/4142 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69103 event pairs, 2131 based on Foata normal form. 109/6644 useless extension candidates. Maximal degree in co-relation 10234. Up to 3627 conditions per place. [2024-11-12 16:21:59,332 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 106 selfloop transitions, 15 changer transitions 0/157 dead transitions. [2024-11-12 16:21:59,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 157 transitions, 880 flow [2024-11-12 16:21:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:21:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:21:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-12 16:21:59,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7218390804597701 [2024-11-12 16:21:59,334 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 464 flow. Second operand 5 states and 314 transitions. [2024-11-12 16:21:59,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 157 transitions, 880 flow [2024-11-12 16:21:59,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 157 transitions, 864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:21:59,345 INFO L231 Difference]: Finished difference. Result has 114 places, 109 transitions, 502 flow [2024-11-12 16:21:59,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=502, PETRI_PLACES=114, PETRI_TRANSITIONS=109} [2024-11-12 16:21:59,347 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2024-11-12 16:21:59,347 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 109 transitions, 502 flow [2024-11-12 16:21:59,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-12 16:21:59,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:59,348 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:59,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:21:59,348 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:21:59,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1047494618, now seen corresponding path program 1 times [2024-11-12 16:21:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238138473] [2024-11-12 16:21:59,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:59,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:21:59,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238138473] [2024-11-12 16:21:59,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238138473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:59,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:59,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:21:59,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582781297] [2024-11-12 16:21:59,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:59,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:21:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:21:59,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:21:59,576 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 87 [2024-11-12 16:21:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 109 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2024-11-12 16:21:59,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:59,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 87 [2024-11-12 16:21:59,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:00,283 INFO L124 PetriNetUnfolderBase]: 5171/10750 cut-off events. [2024-11-12 16:22:00,283 INFO L125 PetriNetUnfolderBase]: For 6239/6239 co-relation queries the response was YES. [2024-11-12 16:22:00,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22225 conditions, 10750 events. 5171/10750 cut-off events. For 6239/6239 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 93630 event pairs, 4137 based on Foata normal form. 0/8369 useless extension candidates. Maximal degree in co-relation 12410. Up to 7536 conditions per place. [2024-11-12 16:22:00,333 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 66 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-11-12 16:22:00,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 105 transitions, 646 flow [2024-11-12 16:22:00,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-12 16:22:00,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5195402298850574 [2024-11-12 16:22:00,335 INFO L175 Difference]: Start difference. First operand has 114 places, 109 transitions, 502 flow. Second operand 5 states and 226 transitions. [2024-11-12 16:22:00,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 105 transitions, 646 flow [2024-11-12 16:22:00,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 105 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:22:00,344 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 505 flow [2024-11-12 16:22:00,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=505, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-11-12 16:22:00,345 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 29 predicate places. [2024-11-12 16:22:00,345 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 505 flow [2024-11-12 16:22:00,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 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) [2024-11-12 16:22:00,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:00,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:00,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:22:00,346 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:22:00,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:00,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1047494619, now seen corresponding path program 1 times [2024-11-12 16:22:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:00,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135078215] [2024-11-12 16:22:00,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:00,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:00,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:00,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135078215] [2024-11-12 16:22:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135078215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:00,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913566680] [2024-11-12 16:22:00,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:00,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:00,592 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) [2024-11-12 16:22:00,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:22:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:00,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:22:00,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:00,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:22:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:00,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:00,787 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:22:00,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-12 16:22:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:00,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:00,831 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:00,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:00,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:01,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 96 [2024-11-12 16:22:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913566680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:01,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:01,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-12 16:22:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431281869] [2024-11-12 16:22:01,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:01,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:22:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:22:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:22:05,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 87 [2024-11-12 16:22:05,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 505 flow. Second operand has 16 states, 16 states have (on average 34.9375) internal successors, (559), 16 states have internal predecessors, (559), 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) [2024-11-12 16:22:05,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:05,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 87 [2024-11-12 16:22:05,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:06,965 INFO L124 PetriNetUnfolderBase]: 9168/16478 cut-off events. [2024-11-12 16:22:06,965 INFO L125 PetriNetUnfolderBase]: For 7714/7714 co-relation queries the response was YES. [2024-11-12 16:22:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34769 conditions, 16478 events. 9168/16478 cut-off events. For 7714/7714 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 130570 event pairs, 2974 based on Foata normal form. 0/13074 useless extension candidates. Maximal degree in co-relation 23263. Up to 4836 conditions per place. [2024-11-12 16:22:07,040 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 144 selfloop transitions, 27 changer transitions 0/197 dead transitions. [2024-11-12 16:22:07,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 197 transitions, 1114 flow [2024-11-12 16:22:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 443 transitions. [2024-11-12 16:22:07,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.565772669220945 [2024-11-12 16:22:07,043 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 505 flow. Second operand 9 states and 443 transitions. [2024-11-12 16:22:07,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 197 transitions, 1114 flow [2024-11-12 16:22:07,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 1098 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:07,056 INFO L231 Difference]: Finished difference. Result has 119 places, 108 transitions, 571 flow [2024-11-12 16:22:07,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=571, PETRI_PLACES=119, PETRI_TRANSITIONS=108} [2024-11-12 16:22:07,057 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2024-11-12 16:22:07,057 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 108 transitions, 571 flow [2024-11-12 16:22:07,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 34.9375) internal successors, (559), 16 states have internal predecessors, (559), 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) [2024-11-12 16:22:07,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:07,057 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:07,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:22:07,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:07,259 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:22:07,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:07,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1887404329, now seen corresponding path program 1 times [2024-11-12 16:22:07,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80389745] [2024-11-12 16:22:07,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80389745] [2024-11-12 16:22:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80389745] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:07,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:22:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741018471] [2024-11-12 16:22:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:07,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:22:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:22:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:22:07,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 87 [2024-11-12 16:22:07,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 108 transitions, 571 flow. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:07,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:07,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 87 [2024-11-12 16:22:07,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:08,786 INFO L124 PetriNetUnfolderBase]: 8055/14888 cut-off events. [2024-11-12 16:22:08,786 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2024-11-12 16:22:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33039 conditions, 14888 events. 8055/14888 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 119140 event pairs, 6517 based on Foata normal form. 0/13167 useless extension candidates. Maximal degree in co-relation 22409. Up to 11626 conditions per place. [2024-11-12 16:22:08,857 INFO L140 encePairwiseOnDemand]: 80/87 looper letters, 64 selfloop transitions, 14 changer transitions 0/104 dead transitions. [2024-11-12 16:22:08,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 104 transitions, 719 flow [2024-11-12 16:22:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:08,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:08,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2024-11-12 16:22:08,866 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2024-11-12 16:22:08,866 INFO L175 Difference]: Start difference. First operand has 119 places, 108 transitions, 571 flow. Second operand 5 states and 230 transitions. [2024-11-12 16:22:08,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 104 transitions, 719 flow [2024-11-12 16:22:08,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 104 transitions, 670 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-12 16:22:08,882 INFO L231 Difference]: Finished difference. Result has 115 places, 104 transitions, 542 flow [2024-11-12 16:22:08,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=115, PETRI_TRANSITIONS=104} [2024-11-12 16:22:08,883 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 31 predicate places. [2024-11-12 16:22:08,883 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 104 transitions, 542 flow [2024-11-12 16:22:08,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:22:08,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:08,884 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:08,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:22:08,884 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:22:08,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1887404328, now seen corresponding path program 1 times [2024-11-12 16:22:08,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:08,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227856173] [2024-11-12 16:22:08,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227856173] [2024-11-12 16:22:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227856173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582015001] [2024-11-12 16:22:09,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:09,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:09,117 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) [2024-11-12 16:22:09,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:22:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:09,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:22:09,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:09,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:22:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:09,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-12 16:22:09,294 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:09,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:09,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:09,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-12 16:22:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:22:09,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582015001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:09,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:09,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:22:09,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296385672] [2024-11-12 16:22:09,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:09,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:22:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:22:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:22:10,541 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 87 [2024-11-12 16:22:10,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 104 transitions, 542 flow. Second operand has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 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) [2024-11-12 16:22:10,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:10,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 87 [2024-11-12 16:22:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:11,816 INFO L124 PetriNetUnfolderBase]: 6724/11535 cut-off events. [2024-11-12 16:22:11,816 INFO L125 PetriNetUnfolderBase]: For 7983/7983 co-relation queries the response was YES. [2024-11-12 16:22:11,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26284 conditions, 11535 events. 6724/11535 cut-off events. For 7983/7983 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 82963 event pairs, 2535 based on Foata normal form. 0/9956 useless extension candidates. Maximal degree in co-relation 17425. Up to 3385 conditions per place. [2024-11-12 16:22:11,921 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 130 selfloop transitions, 31 changer transitions 0/187 dead transitions. [2024-11-12 16:22:11,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 187 transitions, 1142 flow [2024-11-12 16:22:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:22:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:22:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 498 transitions. [2024-11-12 16:22:11,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6360153256704981 [2024-11-12 16:22:11,923 INFO L175 Difference]: Start difference. First operand has 115 places, 104 transitions, 542 flow. Second operand 9 states and 498 transitions. [2024-11-12 16:22:11,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 187 transitions, 1142 flow [2024-11-12 16:22:11,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 187 transitions, 1118 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:22:11,943 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 630 flow [2024-11-12 16:22:11,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2024-11-12 16:22:11,943 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-12 16:22:11,944 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 630 flow [2024-11-12 16:22:11,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.92307692307692) internal successors, (558), 13 states have internal predecessors, (558), 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) [2024-11-12 16:22:11,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:11,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:11,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:22:12,148 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,SelfDestructingSolverStorable15 [2024-11-12 16:22:12,149 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:22:12,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash 101177133, now seen corresponding path program 1 times [2024-11-12 16:22:12,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:12,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260442222] [2024-11-12 16:22:12,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:12,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:12,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:22:12,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260442222] [2024-11-12 16:22:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260442222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:22:12,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:22:12,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:22:12,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557295618] [2024-11-12 16:22:12,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:22:12,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:22:12,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:22:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:22:12,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 87 [2024-11-12 16:22:12,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 630 flow. Second operand has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-11-12 16:22:12,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:12,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 87 [2024-11-12 16:22:12,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:13,551 INFO L124 PetriNetUnfolderBase]: 5708/10420 cut-off events. [2024-11-12 16:22:13,551 INFO L125 PetriNetUnfolderBase]: For 10692/10752 co-relation queries the response was YES. [2024-11-12 16:22:13,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24519 conditions, 10420 events. 5708/10420 cut-off events. For 10692/10752 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 76614 event pairs, 3414 based on Foata normal form. 140/9019 useless extension candidates. Maximal degree in co-relation 16001. Up to 5417 conditions per place. [2024-11-12 16:22:13,604 INFO L140 encePairwiseOnDemand]: 82/87 looper letters, 108 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-11-12 16:22:13,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 151 transitions, 1086 flow [2024-11-12 16:22:13,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:22:13,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:22:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2024-11-12 16:22:13,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7057471264367816 [2024-11-12 16:22:13,608 INFO L175 Difference]: Start difference. First operand has 121 places, 108 transitions, 630 flow. Second operand 5 states and 307 transitions. [2024-11-12 16:22:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 151 transitions, 1086 flow [2024-11-12 16:22:13,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1017 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-12 16:22:13,622 INFO L231 Difference]: Finished difference. Result has 121 places, 110 transitions, 629 flow [2024-11-12 16:22:13,622 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=629, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2024-11-12 16:22:13,626 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 37 predicate places. [2024-11-12 16:22:13,626 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 629 flow [2024-11-12 16:22:13,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.6) internal successors, (243), 5 states have internal predecessors, (243), 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) [2024-11-12 16:22:13,627 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:13,627 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:13,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:22:13,627 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:22:13,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -355185525, now seen corresponding path program 1 times [2024-11-12 16:22:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:13,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138420965] [2024-11-12 16:22:13,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:13,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138420965] [2024-11-12 16:22:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138420965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679267614] [2024-11-12 16:22:14,004 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:14,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:14,006 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) [2024-11-12 16:22:14,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:22:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:14,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:22:14,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:14,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:22:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:14,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-12 16:22:14,148 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:14,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:22:14,168 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:22:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-12 16:22:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:14,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:14,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-12 16:22:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:22:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679267614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:14,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:14,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-12 16:22:14,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982486422] [2024-11-12 16:22:14,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:14,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:22:14,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:14,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:22:14,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:22:18,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:22,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:26,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:30,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:34,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:38,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:42,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:46,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:51,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:55,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:59,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:23:03,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:23:07,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:23:11,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:23:11,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 87 [2024-11-12 16:23:11,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 110 transitions, 629 flow. Second operand has 15 states, 15 states have (on average 26.2) internal successors, (393), 15 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:23:11,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:11,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 87 [2024-11-12 16:23:11,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:23:13,833 INFO L124 PetriNetUnfolderBase]: 19722/31327 cut-off events. [2024-11-12 16:23:13,834 INFO L125 PetriNetUnfolderBase]: For 25921/26249 co-relation queries the response was YES. [2024-11-12 16:23:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72149 conditions, 31327 events. 19722/31327 cut-off events. For 25921/26249 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 230876 event pairs, 6727 based on Foata normal form. 0/26912 useless extension candidates. Maximal degree in co-relation 56529. Up to 9365 conditions per place. [2024-11-12 16:23:13,990 INFO L140 encePairwiseOnDemand]: 75/87 looper letters, 171 selfloop transitions, 31 changer transitions 0/219 dead transitions. [2024-11-12 16:23:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 219 transitions, 1424 flow [2024-11-12 16:23:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:23:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:23:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 400 transitions. [2024-11-12 16:23:13,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45977011494252873 [2024-11-12 16:23:13,991 INFO L175 Difference]: Start difference. First operand has 121 places, 110 transitions, 629 flow. Second operand 10 states and 400 transitions. [2024-11-12 16:23:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 219 transitions, 1424 flow [2024-11-12 16:23:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 219 transitions, 1400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:23:14,015 INFO L231 Difference]: Finished difference. Result has 130 places, 112 transitions, 698 flow [2024-11-12 16:23:14,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=130, PETRI_TRANSITIONS=112} [2024-11-12 16:23:14,015 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 46 predicate places. [2024-11-12 16:23:14,015 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 112 transitions, 698 flow [2024-11-12 16:23:14,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 26.2) internal successors, (393), 15 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:23:14,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:23:14,016 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:23:14,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:23:14,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-12 16:23:14,217 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-12 16:23:14,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:23:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1874151482, now seen corresponding path program 1 times [2024-11-12 16:23:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:23:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340089270] [2024-11-12 16:23:14,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:23:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:14,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:23:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340089270] [2024-11-12 16:23:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340089270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:23:14,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072471848] [2024-11-12 16:23:14,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:23:14,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:23:14,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:23:14,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:23:14,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:23:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:23:14,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:23:14,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:23:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:14,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:23:14,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-12 16:23:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:23:14,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072471848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:23:14,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:23:14,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:23:14,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78876608] [2024-11-12 16:23:14,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:23:14,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:23:14,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:23:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:23:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:23:15,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 87 [2024-11-12 16:23:15,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 112 transitions, 698 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 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) [2024-11-12 16:23:15,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:23:15,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 87 [2024-11-12 16:23:15,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand