./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/popl20-three-array-max.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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:56:31,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:56:32,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:56:32,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:56:32,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:56:32,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:56:32,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:56:32,031 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:56:32,032 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:56:32,032 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:56:32,032 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:56:32,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:56:32,033 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:56:32,033 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:56:32,034 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:56:32,034 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:56:32,034 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:56:32,034 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:56:32,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:56:32,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:56:32,035 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:56:32,043 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:56:32,043 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:56:32,043 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:56:32,043 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:56:32,044 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:56:32,044 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:56:32,044 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:56:32,044 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:56:32,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:56:32,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:56:32,045 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:56:32,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:56:32,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:32,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:56:32,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:56:32,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:56:32,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:56:32,047 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:56:32,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:56:32,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:56:32,048 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:56:32,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-11-09 10:56:32,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:56:32,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:56:32,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:56:32,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:56:32,280 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:56:32,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-09 10:56:33,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:56:33,826 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:56:33,827 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-11-09 10:56:33,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95110b6a3/cb4a7b58ffeb4680bf0ace14e9cce0f4/FLAGf80ad7060 [2024-11-09 10:56:34,197 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95110b6a3/cb4a7b58ffeb4680bf0ace14e9cce0f4 [2024-11-09 10:56:34,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:56:34,202 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:56:34,204 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:34,204 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:56:34,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:56:34,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,210 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311a833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34, skipping insertion in model container [2024-11-09 10:56:34,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:56:34,404 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:56:34,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:34,423 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:56:34,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:56:34,459 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:56:34,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34 WrapperNode [2024-11-09 10:56:34,460 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:56:34,460 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:34,461 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:56:34,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:56:34,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,503 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 224 [2024-11-09 10:56:34,503 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:56:34,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:56:34,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:56:34,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:56:34,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,515 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,534 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-09 10:56:34,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:56:34,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:56:34,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:56:34,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:56:34,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (1/1) ... [2024-11-09 10:56:34,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:56:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:34,585 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) [2024-11-09 10:56:34,587 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 [2024-11-09 10:56:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:56:34,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:56:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:56:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:56:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:56:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:56:34,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:56:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:56:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:56:34,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:56:34,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:56:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:56:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:56:34,627 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:56:34,723 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:56:34,725 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:56:35,135 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:56:35,135 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:56:35,356 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:56:35,357 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:56:35,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:35 BoogieIcfgContainer [2024-11-09 10:56:35,357 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:56:35,359 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:56:35,359 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:56:35,361 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:56:35,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:56:34" (1/3) ... [2024-11-09 10:56:35,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c542ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:35, skipping insertion in model container [2024-11-09 10:56:35,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:56:34" (2/3) ... [2024-11-09 10:56:35,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c542ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:56:35, skipping insertion in model container [2024-11-09 10:56:35,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:56:35" (3/3) ... [2024-11-09 10:56:35,364 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-11-09 10:56:35,377 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:56:35,377 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-09 10:56:35,377 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:56:35,435 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:56:35,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-09 10:56:35,535 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-09 10:56:35,535 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:56:35,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 235 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-09 10:56:35,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-09 10:56:35,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-09 10:56:35,597 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:56:35,607 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;@52fc64f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:56:35,607 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-09 10:56:35,609 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:56:35,609 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:56:35,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:56:35,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:35,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:35,611 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:35,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 904789, now seen corresponding path program 1 times [2024-11-09 10:56:35,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:35,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738948107] [2024-11-09 10:56:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:35,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:35,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:35,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738948107] [2024-11-09 10:56:35,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738948107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:35,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:35,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:56:35,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638553546] [2024-11-09 10:56:35,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:35,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:56:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:35,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:56:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:56:35,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:35,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-09 10:56:35,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:35,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:35,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:36,508 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-09 10:56:36,508 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-09 10:56:36,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29802 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-11-09 10:56:36,537 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-09 10:56:36,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-09 10:56:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-09 10:56:36,547 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-09 10:56:36,548 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-09 10:56:36,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-09 10:56:36,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:56:36,558 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-09 10:56:36,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, 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} [2024-11-09 10:56:36,562 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-09 10:56:36,562 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-09 10:56:36,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2024-11-09 10:56:36,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:36,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:56:36,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:56:36,563 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:36,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash 904790, now seen corresponding path program 1 times [2024-11-09 10:56:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:36,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614508675] [2024-11-09 10:56:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:36,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:36,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614508675] [2024-11-09 10:56:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614508675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:36,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:36,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:56:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831610881] [2024-11-09 10:56:36,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:36,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:36,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:36,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-09 10:56:36,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:36,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:36,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:37,337 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-09 10:56:37,338 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:56:37,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29796 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-11-09 10:56:37,404 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-09 10:56:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-09 10:56:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:56:37,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:56:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-09 10:56:37,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-09 10:56:37,408 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-09 10:56:37,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-09 10:56:37,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:37,410 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-09 10:56:37,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, 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=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-11-09 10:56:37,412 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-09 10:56:37,413 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-09 10:56:37,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 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) [2024-11-09 10:56:37,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:37,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:56:37,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:56:37,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:37,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:37,415 INFO L85 PathProgramCache]: Analyzing trace with hash 869532509, now seen corresponding path program 1 times [2024-11-09 10:56:37,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:37,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392315560] [2024-11-09 10:56:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:37,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:37,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:37,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392315560] [2024-11-09 10:56:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392315560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:37,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511640936] [2024-11-09 10:56:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:37,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:37,609 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) [2024-11-09 10:56:37,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:56:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:37,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:56:37,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:37,771 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 [2024-11-09 10:56:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:37,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:37,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511640936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:37,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:37,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:56:37,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956558811] [2024-11-09 10:56:37,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:37,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:56:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:37,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:56:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:56:38,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-09 10:56:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:38,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:38,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:38,772 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-09 10:56:38,772 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-09 10:56:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29832 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-11-09 10:56:38,807 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-09 10:56:38,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-09 10:56:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:56:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:56:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-09 10:56:38,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-09 10:56:38,809 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-09 10:56:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-09 10:56:38,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:38,811 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-09 10:56:38,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-09 10:56:38,813 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-09 10:56:38,814 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-09 10:56:38,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-09 10:56:38,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:38,814 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:56:38,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:56:39,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:39,020 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:39,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:39,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1185706500, now seen corresponding path program 1 times [2024-11-09 10:56:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:39,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005057960] [2024-11-09 10:56:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:39,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005057960] [2024-11-09 10:56:39,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005057960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:39,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601073099] [2024-11-09 10:56:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:39,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:39,135 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) [2024-11-09 10:56:39,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:56:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:39,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:56:39,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:39,199 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 [2024-11-09 10:56:39,273 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:56:39,273 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 32 treesize of output 27 [2024-11-09 10:56:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:39,293 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601073099] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:56:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-09 10:56:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212172940] [2024-11-09 10:56:39,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:39,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:56:39,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:39,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:39,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:39,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:39,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:39,761 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-09 10:56:39,761 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-09 10:56:39,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29792 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-11-09 10:56:39,779 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-09 10:56:39,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-09 10:56:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-09 10:56:39,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-09 10:56:39,781 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-09 10:56:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-09 10:56:39,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:56:39,784 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-09 10:56:39,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-09 10:56:39,786 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-09 10:56:39,786 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-09 10:56:39,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:56:39,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:39,787 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:39,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:56:39,990 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,SelfDestructingSolverStorable3 [2024-11-09 10:56:39,991 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:39,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1897801947, now seen corresponding path program 1 times [2024-11-09 10:56:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:39,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686812814] [2024-11-09 10:56:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:39,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:40,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:40,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686812814] [2024-11-09 10:56:40,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686812814] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:40,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:40,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942134646] [2024-11-09 10:56:40,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:40,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:56:40,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:56:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:56:40,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-09 10:56:40,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-09 10:56:40,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:40,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-09 10:56:40,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:40,456 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-09 10:56:40,457 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-09 10:56:40,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29835 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-11-09 10:56:40,480 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-09 10:56:40,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-09 10:56:40,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:56:40,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:56:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-09 10:56:40,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-09 10:56:40,481 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-09 10:56:40,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-09 10:56:40,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:56:40,483 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-09 10:56:40,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-09 10:56:40,484 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-09 10:56:40,484 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-09 10:56:40,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-09 10:56:40,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:40,487 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:40,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:56:40,487 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:40,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:40,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1297642248, now seen corresponding path program 1 times [2024-11-09 10:56:40,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59118721] [2024-11-09 10:56:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:40,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:40,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:40,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59118721] [2024-11-09 10:56:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59118721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:40,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982929551] [2024-11-09 10:56:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:40,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:40,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:40,592 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) [2024-11-09 10:56:40,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:56:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:40,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:56:40,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:40,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:40,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982929551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:40,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:40,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-09 10:56:40,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887529612] [2024-11-09 10:56:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:40,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:56:40,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:56:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:56:40,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-09 10:56:40,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-09 10:56:40,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:40,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-09 10:56:40,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:41,537 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-09 10:56:41,537 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-09 10:56:41,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63404 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-11-09 10:56:41,641 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-09 10:56:41,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-09 10:56:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:56:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:56:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-09 10:56:41,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-09 10:56:41,642 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-09 10:56:41,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-09 10:56:41,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:56:41,645 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-09 10:56:41,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-09 10:56:41,645 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-09 10:56:41,645 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-09 10:56:41,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-09 10:56:41,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:41,646 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-09 10:56:41,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:56:41,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:41,853 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:41,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 35474017, now seen corresponding path program 2 times [2024-11-09 10:56:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025016074] [2024-11-09 10:56:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:42,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025016074] [2024-11-09 10:56:42,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025016074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:42,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126703784] [2024-11-09 10:56:42,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:56:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:42,082 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) [2024-11-09 10:56:42,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:56:42,162 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:56:42,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:42,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:56:42,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:42,172 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 [2024-11-09 10:56:42,267 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:56:42,268 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 32 treesize of output 27 [2024-11-09 10:56:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:42,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126703784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:42,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 10:56:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952819951] [2024-11-09 10:56:42,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:42,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:56:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:56:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:56:43,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:43,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 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) [2024-11-09 10:56:43,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:43,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:43,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:44,791 INFO L124 PetriNetUnfolderBase]: 5916/9288 cut-off events. [2024-11-09 10:56:44,791 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-11-09 10:56:44,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17381 conditions, 9288 events. 5916/9288 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63466 event pairs, 4268 based on Foata normal form. 8/6529 useless extension candidates. Maximal degree in co-relation 8691. Up to 3894 conditions per place. [2024-11-09 10:56:44,838 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 101 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-11-09 10:56:44,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 807 flow [2024-11-09 10:56:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:56:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:56:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 542 transitions. [2024-11-09 10:56:44,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5074906367041199 [2024-11-09 10:56:44,840 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 12 states and 542 transitions. [2024-11-09 10:56:44,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 807 flow [2024-11-09 10:56:44,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 153 transitions, 779 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-11-09 10:56:44,844 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 456 flow [2024-11-09 10:56:44,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=456, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-11-09 10:56:44,845 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 15 predicate places. [2024-11-09 10:56:44,845 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 456 flow [2024-11-09 10:56:44,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 35.578947368421055) internal successors, (676), 19 states have internal predecessors, (676), 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) [2024-11-09 10:56:44,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:44,846 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:44,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:56:45,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:45,051 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:45,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash -938285925, now seen corresponding path program 1 times [2024-11-09 10:56:45,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:45,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739361509] [2024-11-09 10:56:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:45,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:45,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739361509] [2024-11-09 10:56:45,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739361509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:56:45,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:56:45,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:56:45,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610776088] [2024-11-09 10:56:45,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:45,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:56:45,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:56:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:56:45,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-09 10:56:45,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-09 10:56:45,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:45,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-09 10:56:45,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:45,754 INFO L124 PetriNetUnfolderBase]: 5982/9620 cut-off events. [2024-11-09 10:56:45,754 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-09 10:56:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 9620 events. 5982/9620 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65788 event pairs, 4376 based on Foata normal form. 0/6848 useless extension candidates. Maximal degree in co-relation 17804. Up to 7873 conditions per place. [2024-11-09 10:56:45,933 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 67 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-09 10:56:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 594 flow [2024-11-09 10:56:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:56:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:56:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-09 10:56:45,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-09 10:56:45,938 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 456 flow. Second operand 5 states and 194 transitions. [2024-11-09 10:56:45,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 594 flow [2024-11-09 10:56:45,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 561 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-09 10:56:45,942 INFO L231 Difference]: Finished difference. Result has 95 places, 97 transitions, 427 flow [2024-11-09 10:56:45,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=95, PETRI_TRANSITIONS=97} [2024-11-09 10:56:45,945 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2024-11-09 10:56:45,945 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 97 transitions, 427 flow [2024-11-09 10:56:45,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-09 10:56:45,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:45,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:45,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:56:45,945 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:56:45,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash -938285924, now seen corresponding path program 1 times [2024-11-09 10:56:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:45,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633463692] [2024-11-09 10:56:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:56:46,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:46,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633463692] [2024-11-09 10:56:46,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633463692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:46,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453822912] [2024-11-09 10:56:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:46,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:46,290 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) [2024-11-09 10:56:46,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:56:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:46,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:56:46,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:46,371 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 [2024-11-09 10:56:46,382 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 [2024-11-09 10:56:46,443 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:56:46,443 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 [2024-11-09 10:56:46,463 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 18 treesize of output 13 [2024-11-09 10:56:46,556 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-09 10:56:46,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-09 10:56:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:46,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:47,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:56:47,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453822912] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:47,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:56:47,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-09 10:56:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408484724] [2024-11-09 10:56:47,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:56:47,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:56:47,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:56:47,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:56:47,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:56:47,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 97 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 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) [2024-11-09 10:56:47,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:47,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:56:47,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:55,564 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] [2024-11-09 10:56:59,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:03,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:07,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:11,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:15,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:19,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:23,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:27,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:31,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:35,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:39,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:43,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:57:44,351 INFO L124 PetriNetUnfolderBase]: 5330/8368 cut-off events. [2024-11-09 10:57:44,351 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-11-09 10:57:44,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15706 conditions, 8368 events. 5330/8368 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56651 event pairs, 3824 based on Foata normal form. 0/5958 useless extension candidates. Maximal degree in co-relation 15652. Up to 7001 conditions per place. [2024-11-09 10:57:44,381 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 64 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-09 10:57:44,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 96 transitions, 577 flow [2024-11-09 10:57:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:57:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:57:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-09 10:57:44,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2024-11-09 10:57:44,383 INFO L175 Difference]: Start difference. First operand has 95 places, 97 transitions, 427 flow. Second operand 6 states and 256 transitions. [2024-11-09 10:57:44,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 96 transitions, 577 flow [2024-11-09 10:57:44,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 566 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:44,385 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 432 flow [2024-11-09 10:57:44,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-11-09 10:57:44,385 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 9 predicate places. [2024-11-09 10:57:44,386 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 432 flow [2024-11-09 10:57:44,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 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) [2024-11-09 10:57:44,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:44,386 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-09 10:57:44,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:57:44,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:44,586 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:44,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -269178843, now seen corresponding path program 3 times [2024-11-09 10:57:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:44,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647159757] [2024-11-09 10:57:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:44,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647159757] [2024-11-09 10:57:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647159757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880627459] [2024-11-09 10:57:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:57:44,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:44,698 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) [2024-11-09 10:57:44,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:57:44,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:57:44,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:44,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:57:44,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:44,781 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 [2024-11-09 10:57:44,855 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:57:44,856 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 27 treesize of output 24 [2024-11-09 10:57:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:44,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880627459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:45,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:45,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 10:57:45,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684856340] [2024-11-09 10:57:45,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:45,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:57:45,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:45,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:57:45,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:57:45,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:57:45,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 432 flow. Second operand has 18 states, 18 states have (on average 35.77777777777778) internal successors, (644), 18 states have internal predecessors, (644), 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) [2024-11-09 10:57:45,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:45,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:57:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:47,088 INFO L124 PetriNetUnfolderBase]: 5330/8366 cut-off events. [2024-11-09 10:57:47,089 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-09 10:57:47,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15706 conditions, 8366 events. 5330/8366 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56669 event pairs, 3824 based on Foata normal form. 6/5962 useless extension candidates. Maximal degree in co-relation 15603. Up to 7000 conditions per place. [2024-11-09 10:57:47,126 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 38 selfloop transitions, 47 changer transitions 0/106 dead transitions. [2024-11-09 10:57:47,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 670 flow [2024-11-09 10:57:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:57:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:57:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 737 transitions. [2024-11-09 10:57:47,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358367829686576 [2024-11-09 10:57:47,129 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 432 flow. Second operand 19 states and 737 transitions. [2024-11-09 10:57:47,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 670 flow [2024-11-09 10:57:47,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 106 transitions, 627 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-09 10:57:47,131 INFO L231 Difference]: Finished difference. Result has 105 places, 106 transitions, 551 flow [2024-11-09 10:57:47,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=551, PETRI_PLACES=105, PETRI_TRANSITIONS=106} [2024-11-09 10:57:47,132 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 19 predicate places. [2024-11-09 10:57:47,132 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 106 transitions, 551 flow [2024-11-09 10:57:47,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.77777777777778) internal successors, (644), 18 states have internal predecessors, (644), 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) [2024-11-09 10:57:47,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:47,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:47,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:57:47,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:47,337 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:47,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:47,338 INFO L85 PathProgramCache]: Analyzing trace with hash 977908366, now seen corresponding path program 1 times [2024-11-09 10:57:47,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:47,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483245876] [2024-11-09 10:57:47,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:47,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:47,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:47,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483245876] [2024-11-09 10:57:47,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483245876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:47,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:47,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:57:47,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489583096] [2024-11-09 10:57:47,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:47,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:47,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-09 10:57:47,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 106 transitions, 551 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:47,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:47,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-09 10:57:47,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:47,951 INFO L124 PetriNetUnfolderBase]: 5420/8478 cut-off events. [2024-11-09 10:57:47,951 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-09 10:57:47,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16017 conditions, 8478 events. 5420/8478 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 54928 event pairs, 3956 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 7929. Up to 7170 conditions per place. [2024-11-09 10:57:47,987 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-09 10:57:47,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 711 flow [2024-11-09 10:57:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-09 10:57:47,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-09 10:57:47,989 INFO L175 Difference]: Start difference. First operand has 105 places, 106 transitions, 551 flow. Second operand 5 states and 197 transitions. [2024-11-09 10:57:47,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 711 flow [2024-11-09 10:57:47,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 533 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-11-09 10:57:47,991 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 381 flow [2024-11-09 10:57:47,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-11-09 10:57:47,992 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-11-09 10:57:47,992 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 381 flow [2024-11-09 10:57:47,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:47,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:47,992 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:47,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:57:47,992 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:47,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:47,993 INFO L85 PathProgramCache]: Analyzing trace with hash 977908367, now seen corresponding path program 1 times [2024-11-09 10:57:47,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:47,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540431674] [2024-11-09 10:57:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:48,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:48,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540431674] [2024-11-09 10:57:48,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540431674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:48,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635591262] [2024-11-09 10:57:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:48,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:48,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:48,134 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) [2024-11-09 10:57:48,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:57:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:48,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:57:48,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:48,204 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 [2024-11-09 10:57:48,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:57:48,235 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 [2024-11-09 10:57:48,239 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:57:48,239 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 [2024-11-09 10:57:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:48,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:48,306 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 [2024-11-09 10:57:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:48,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635591262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:48,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:48,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 10:57:48,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540880835] [2024-11-09 10:57:48,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:48,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:57:48,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:48,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:57:48,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:57:48,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-09 10:57:48,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 381 flow. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 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) [2024-11-09 10:57:48,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:48,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-09 10:57:48,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:49,225 INFO L124 PetriNetUnfolderBase]: 4744/7446 cut-off events. [2024-11-09 10:57:49,225 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-09 10:57:49,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13947 conditions, 7446 events. 4744/7446 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 48817 event pairs, 3380 based on Foata normal form. 0/5397 useless extension candidates. Maximal degree in co-relation 6912. Up to 6234 conditions per place. [2024-11-09 10:57:49,266 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 65 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-09 10:57:49,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 545 flow [2024-11-09 10:57:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-09 10:57:49,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-09 10:57:49,268 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 381 flow. Second operand 8 states and 310 transitions. [2024-11-09 10:57:49,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 545 flow [2024-11-09 10:57:49,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 99 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:49,274 INFO L231 Difference]: Finished difference. Result has 93 places, 99 transitions, 401 flow [2024-11-09 10:57:49,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=401, PETRI_PLACES=93, PETRI_TRANSITIONS=99} [2024-11-09 10:57:49,274 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 7 predicate places. [2024-11-09 10:57:49,275 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 99 transitions, 401 flow [2024-11-09 10:57:49,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 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) [2024-11-09 10:57:49,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:49,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:49,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:57:49,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:49,475 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:49,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:49,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1136642886, now seen corresponding path program 1 times [2024-11-09 10:57:49,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:49,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84706142] [2024-11-09 10:57:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:49,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:49,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:49,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84706142] [2024-11-09 10:57:49,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84706142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:49,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940230565] [2024-11-09 10:57:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:49,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:49,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:49,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:49,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:57:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:49,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 10:57:49,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:49,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940230565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:49,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-09 10:57:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177912513] [2024-11-09 10:57:49,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:49,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:49,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:49,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:57:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 99 transitions, 401 flow. Second operand has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-09 10:57:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:57:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:50,243 INFO L124 PetriNetUnfolderBase]: 3556/5670 cut-off events. [2024-11-09 10:57:50,243 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-09 10:57:50,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10692 conditions, 5670 events. 3556/5670 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 35282 event pairs, 2404 based on Foata normal form. 0/4074 useless extension candidates. Maximal degree in co-relation 7786. Up to 3518 conditions per place. [2024-11-09 10:57:50,265 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 98 selfloop transitions, 35 changer transitions 0/147 dead transitions. [2024-11-09 10:57:50,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 771 flow [2024-11-09 10:57:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:57:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:57:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 439 transitions. [2024-11-09 10:57:50,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5480649188514357 [2024-11-09 10:57:50,267 INFO L175 Difference]: Start difference. First operand has 93 places, 99 transitions, 401 flow. Second operand 9 states and 439 transitions. [2024-11-09 10:57:50,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 771 flow [2024-11-09 10:57:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 762 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:50,269 INFO L231 Difference]: Finished difference. Result has 100 places, 101 transitions, 477 flow [2024-11-09 10:57:50,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=477, PETRI_PLACES=100, PETRI_TRANSITIONS=101} [2024-11-09 10:57:50,270 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-09 10:57:50,270 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 101 transitions, 477 flow [2024-11-09 10:57:50,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-09 10:57:50,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:50,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:50,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:57:50,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:57:50,471 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:50,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1465569679, now seen corresponding path program 1 times [2024-11-09 10:57:50,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:50,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149872479] [2024-11-09 10:57:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:50,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:50,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149872479] [2024-11-09 10:57:50,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149872479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:50,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169502003] [2024-11-09 10:57:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:50,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:50,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:57:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:50,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 10:57:50,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:50,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169502003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:50,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:50,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-09 10:57:50,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530223080] [2024-11-09 10:57:50,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:50,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:50,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:50,863 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:57:50,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 101 transitions, 477 flow. Second operand has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-09 10:57:50,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:50,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:57:50,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:51,220 INFO L124 PetriNetUnfolderBase]: 2958/4705 cut-off events. [2024-11-09 10:57:51,221 INFO L125 PetriNetUnfolderBase]: For 604/730 co-relation queries the response was YES. [2024-11-09 10:57:51,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9357 conditions, 4705 events. 2958/4705 cut-off events. For 604/730 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27312 event pairs, 2062 based on Foata normal form. 0/3451 useless extension candidates. Maximal degree in co-relation 8014. Up to 3513 conditions per place. [2024-11-09 10:57:51,243 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 85 selfloop transitions, 35 changer transitions 0/134 dead transitions. [2024-11-09 10:57:51,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 134 transitions, 799 flow [2024-11-09 10:57:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:57:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:57:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 426 transitions. [2024-11-09 10:57:51,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5318352059925093 [2024-11-09 10:57:51,245 INFO L175 Difference]: Start difference. First operand has 100 places, 101 transitions, 477 flow. Second operand 9 states and 426 transitions. [2024-11-09 10:57:51,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 134 transitions, 799 flow [2024-11-09 10:57:51,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 734 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:57:51,249 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 497 flow [2024-11-09 10:57:51,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=497, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2024-11-09 10:57:51,250 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-09 10:57:51,250 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 497 flow [2024-11-09 10:57:51,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-09 10:57:51,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:51,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:51,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:57:51,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:57:51,451 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:51,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889248, now seen corresponding path program 1 times [2024-11-09 10:57:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:51,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396870489] [2024-11-09 10:57:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:51,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:51,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396870489] [2024-11-09 10:57:51,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396870489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:51,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:51,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:57:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528368659] [2024-11-09 10:57:51,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:51,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:51,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:57:51,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-09 10:57:51,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:51,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:57:51,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:51,840 INFO L124 PetriNetUnfolderBase]: 2202/3409 cut-off events. [2024-11-09 10:57:51,840 INFO L125 PetriNetUnfolderBase]: For 816/902 co-relation queries the response was YES. [2024-11-09 10:57:51,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 3409 events. 2202/3409 cut-off events. For 816/902 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 18688 event pairs, 1661 based on Foata normal form. 0/2664 useless extension candidates. Maximal degree in co-relation 6119. Up to 2983 conditions per place. [2024-11-09 10:57:51,857 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-11-09 10:57:51,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 665 flow [2024-11-09 10:57:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-09 10:57:51,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-09 10:57:51,859 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 497 flow. Second operand 4 states and 182 transitions. [2024-11-09 10:57:51,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 665 flow [2024-11-09 10:57:51,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 600 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:57:51,871 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 438 flow [2024-11-09 10:57:51,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=438, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-11-09 10:57:51,873 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 13 predicate places. [2024-11-09 10:57:51,873 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 438 flow [2024-11-09 10:57:51,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-09 10:57:51,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:51,873 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:51,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:57:51,873 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:51,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889247, now seen corresponding path program 1 times [2024-11-09 10:57:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:51,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070370084] [2024-11-09 10:57:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070370084] [2024-11-09 10:57:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070370084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568167228] [2024-11-09 10:57:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:51,992 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:51,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:57:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:52,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 10:57:52,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:52,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:52,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568167228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:52,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:52,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-09 10:57:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250657185] [2024-11-09 10:57:52,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:52,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:52,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:52,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:57:52,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 438 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:52,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:52,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:57:52,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:52,569 INFO L124 PetriNetUnfolderBase]: 2206/3416 cut-off events. [2024-11-09 10:57:52,569 INFO L125 PetriNetUnfolderBase]: For 737/926 co-relation queries the response was YES. [2024-11-09 10:57:52,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7231 conditions, 3416 events. 2206/3416 cut-off events. For 737/926 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19040 event pairs, 1283 based on Foata normal form. 0/2572 useless extension candidates. Maximal degree in co-relation 6392. Up to 2351 conditions per place. [2024-11-09 10:57:52,581 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 93 selfloop transitions, 35 changer transitions 0/142 dead transitions. [2024-11-09 10:57:52,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 142 transitions, 810 flow [2024-11-09 10:57:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:57:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:57:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 470 transitions. [2024-11-09 10:57:52,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5280898876404494 [2024-11-09 10:57:52,583 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 438 flow. Second operand 10 states and 470 transitions. [2024-11-09 10:57:52,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 142 transitions, 810 flow [2024-11-09 10:57:52,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 804 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:52,586 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 539 flow [2024-11-09 10:57:52,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=539, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2024-11-09 10:57:52,586 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 23 predicate places. [2024-11-09 10:57:52,586 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 539 flow [2024-11-09 10:57:52,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:52,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:52,587 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:52,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:52,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:57:52,787 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:52,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:52,788 INFO L85 PathProgramCache]: Analyzing trace with hash -2069704291, now seen corresponding path program 2 times [2024-11-09 10:57:52,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:52,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433470505] [2024-11-09 10:57:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:57:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433470505] [2024-11-09 10:57:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433470505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083688805] [2024-11-09 10:57:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:53,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:53,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:53,141 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:53,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:57:53,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:53,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:53,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 10:57:53,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:53,226 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 [2024-11-09 10:57:53,294 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 10:57:53,294 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 20 treesize of output 22 [2024-11-09 10:57:53,302 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 [2024-11-09 10:57:53,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:57:53,418 INFO L349 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2024-11-09 10:57:53,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 34 [2024-11-09 10:57:53,433 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:57:53,434 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 [2024-11-09 10:57:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 10:57:53,804 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:57:53,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083688805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:53,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:57:53,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 15 [2024-11-09 10:57:53,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139362402] [2024-11-09 10:57:53,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:53,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:57:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:57:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:54,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 89 [2024-11-09 10:57:54,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 539 flow. Second operand has 8 states, 8 states have (on average 28.25) internal successors, (226), 8 states have internal predecessors, (226), 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) [2024-11-09 10:57:54,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:54,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 89 [2024-11-09 10:57:54,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:55,061 INFO L124 PetriNetUnfolderBase]: 4627/6973 cut-off events. [2024-11-09 10:57:55,062 INFO L125 PetriNetUnfolderBase]: For 1499/1761 co-relation queries the response was YES. [2024-11-09 10:57:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15631 conditions, 6973 events. 4627/6973 cut-off events. For 1499/1761 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 39880 event pairs, 1614 based on Foata normal form. 0/5401 useless extension candidates. Maximal degree in co-relation 14685. Up to 3800 conditions per place. [2024-11-09 10:57:55,098 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 119 selfloop transitions, 21 changer transitions 0/149 dead transitions. [2024-11-09 10:57:55,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 951 flow [2024-11-09 10:57:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:57:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:57:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 333 transitions. [2024-11-09 10:57:55,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4157303370786517 [2024-11-09 10:57:55,100 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 539 flow. Second operand 9 states and 333 transitions. [2024-11-09 10:57:55,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 951 flow [2024-11-09 10:57:55,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 149 transitions, 909 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:57:55,105 INFO L231 Difference]: Finished difference. Result has 113 places, 105 transitions, 564 flow [2024-11-09 10:57:55,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=113, PETRI_TRANSITIONS=105} [2024-11-09 10:57:55,106 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 27 predicate places. [2024-11-09 10:57:55,106 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 105 transitions, 564 flow [2024-11-09 10:57:55,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.25) internal successors, (226), 8 states have internal predecessors, (226), 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) [2024-11-09 10:57:55,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:55,106 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:55,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:57:55,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:57:55,308 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:55,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -489415018, now seen corresponding path program 1 times [2024-11-09 10:57:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749949488] [2024-11-09 10:57:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:57:55,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:55,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749949488] [2024-11-09 10:57:55,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749949488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:55,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391923140] [2024-11-09 10:57:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:55,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:55,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:55,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:57:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:55,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:57:55,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:55,613 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 [2024-11-09 10:57:55,690 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:57:55,690 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 32 treesize of output 27 [2024-11-09 10:57:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:55,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:57:55,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391923140] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:55,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:57:55,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 17 [2024-11-09 10:57:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522495532] [2024-11-09 10:57:55,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:55,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:57:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:57:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:57:56,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-09 10:57:56,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 105 transitions, 564 flow. Second operand has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 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) [2024-11-09 10:57:56,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:56,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-09 10:57:56,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:56,707 INFO L124 PetriNetUnfolderBase]: 4134/6485 cut-off events. [2024-11-09 10:57:56,707 INFO L125 PetriNetUnfolderBase]: For 2791/3378 co-relation queries the response was YES. [2024-11-09 10:57:56,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15172 conditions, 6485 events. 4134/6485 cut-off events. For 2791/3378 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39501 event pairs, 1643 based on Foata normal form. 102/5256 useless extension candidates. Maximal degree in co-relation 14152. Up to 3101 conditions per place. [2024-11-09 10:57:56,747 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 108 selfloop transitions, 17 changer transitions 0/141 dead transitions. [2024-11-09 10:57:56,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 141 transitions, 920 flow [2024-11-09 10:57:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 391 transitions. [2024-11-09 10:57:56,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5491573033707865 [2024-11-09 10:57:56,749 INFO L175 Difference]: Start difference. First operand has 113 places, 105 transitions, 564 flow. Second operand 8 states and 391 transitions. [2024-11-09 10:57:56,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 141 transitions, 920 flow [2024-11-09 10:57:56,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 876 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-09 10:57:56,761 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 582 flow [2024-11-09 10:57:56,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=582, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2024-11-09 10:57:56,761 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2024-11-09 10:57:56,761 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 582 flow [2024-11-09 10:57:56,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 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) [2024-11-09 10:57:56,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:56,762 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:56,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:56,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:57:56,967 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:56,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash -415937407, now seen corresponding path program 1 times [2024-11-09 10:57:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:56,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527928910] [2024-11-09 10:57:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:57:57,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:57,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527928910] [2024-11-09 10:57:57,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527928910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532487155] [2024-11-09 10:57:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:57,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:57,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:57,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:57,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:57:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:57,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:57:57,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:57,265 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 [2024-11-09 10:57:57,302 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 10:57:57,302 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 16 treesize of output 18 [2024-11-09 10:57:57,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:57,551 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:57:57,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532487155] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:57,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:57:57,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 19 [2024-11-09 10:57:57,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023931708] [2024-11-09 10:57:57,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:57,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:57:57,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:57,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:57:57,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:57:57,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:57:57,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 582 flow. Second operand has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 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) [2024-11-09 10:57:57,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:57,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:57:57,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:58,640 INFO L124 PetriNetUnfolderBase]: 4997/7379 cut-off events. [2024-11-09 10:57:58,641 INFO L125 PetriNetUnfolderBase]: For 6268/6798 co-relation queries the response was YES. [2024-11-09 10:57:58,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19434 conditions, 7379 events. 4997/7379 cut-off events. For 6268/6798 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 40430 event pairs, 1819 based on Foata normal form. 88/6525 useless extension candidates. Maximal degree in co-relation 18438. Up to 3794 conditions per place. [2024-11-09 10:57:58,683 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 108 selfloop transitions, 20 changer transitions 0/141 dead transitions. [2024-11-09 10:57:58,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 141 transitions, 947 flow [2024-11-09 10:57:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:57:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:57:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 398 transitions. [2024-11-09 10:57:58,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4968789013732834 [2024-11-09 10:57:58,684 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 582 flow. Second operand 9 states and 398 transitions. [2024-11-09 10:57:58,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 141 transitions, 947 flow [2024-11-09 10:57:58,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 141 transitions, 925 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:58,700 INFO L231 Difference]: Finished difference. Result has 122 places, 108 transitions, 625 flow [2024-11-09 10:57:58,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=625, PETRI_PLACES=122, PETRI_TRANSITIONS=108} [2024-11-09 10:57:58,700 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 36 predicate places. [2024-11-09 10:57:58,700 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 108 transitions, 625 flow [2024-11-09 10:57:58,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 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) [2024-11-09 10:57:58,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:58,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:58,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:57:58,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:58,901 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:57:58,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:58,902 INFO L85 PathProgramCache]: Analyzing trace with hash -489415022, now seen corresponding path program 1 times [2024-11-09 10:57:58,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:58,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074604759] [2024-11-09 10:57:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:57:59,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074604759] [2024-11-09 10:57:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074604759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:59,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27150951] [2024-11-09 10:57:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:59,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:59,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:59,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:57:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:59,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 10:57:59,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:59,359 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 [2024-11-09 10:57:59,363 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 [2024-11-09 10:57:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:57:59,414 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 18 treesize of output 13 [2024-11-09 10:57:59,426 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:57:59,427 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 [2024-11-09 10:57:59,480 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:57:59,480 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 31 treesize of output 28 [2024-11-09 10:57:59,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:57:59,499 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 [2024-11-09 10:57:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:59,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27150951] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:58:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 24 [2024-11-09 10:58:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442340906] [2024-11-09 10:58:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:58:00,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 10:58:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 10:58:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:58:00,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-09 10:58:00,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 108 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-11-09 10:58:00,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:00,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-09 10:58:00,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:01,699 INFO L124 PetriNetUnfolderBase]: 4137/6344 cut-off events. [2024-11-09 10:58:01,699 INFO L125 PetriNetUnfolderBase]: For 6598/7047 co-relation queries the response was YES. [2024-11-09 10:58:01,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17496 conditions, 6344 events. 4137/6344 cut-off events. For 6598/7047 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35621 event pairs, 1529 based on Foata normal form. 291/5911 useless extension candidates. Maximal degree in co-relation 16520. Up to 2860 conditions per place. [2024-11-09 10:58:01,743 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 100 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-11-09 10:58:01,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 142 transitions, 992 flow [2024-11-09 10:58:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:58:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:58:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 427 transitions. [2024-11-09 10:58:01,745 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4797752808988764 [2024-11-09 10:58:01,745 INFO L175 Difference]: Start difference. First operand has 122 places, 108 transitions, 625 flow. Second operand 10 states and 427 transitions. [2024-11-09 10:58:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 142 transitions, 992 flow [2024-11-09 10:58:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 142 transitions, 959 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-09 10:58:01,775 INFO L231 Difference]: Finished difference. Result has 127 places, 109 transitions, 665 flow [2024-11-09 10:58:01,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=665, PETRI_PLACES=127, PETRI_TRANSITIONS=109} [2024-11-09 10:58:01,779 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2024-11-09 10:58:01,779 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 109 transitions, 665 flow [2024-11-09 10:58:01,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-11-09 10:58:01,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:01,779 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:58:01,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 10:58:01,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:01,980 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:58:01,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1252155440, now seen corresponding path program 1 times [2024-11-09 10:58:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:01,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31864146] [2024-11-09 10:58:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:02,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:02,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31864146] [2024-11-09 10:58:02,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31864146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:02,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160814749] [2024-11-09 10:58:02,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:02,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:02,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:02,083 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:02,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:58:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:02,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:58:02,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:02,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160814749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:02,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-09 10:58:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697072263] [2024-11-09 10:58:02,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:02,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:58:02,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:58:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:58:02,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:58:02,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 109 transitions, 665 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-09 10:58:02,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:02,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:58:02,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:03,270 INFO L124 PetriNetUnfolderBase]: 7512/11332 cut-off events. [2024-11-09 10:58:03,270 INFO L125 PetriNetUnfolderBase]: For 15687/16163 co-relation queries the response was YES. [2024-11-09 10:58:03,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33259 conditions, 11332 events. 7512/11332 cut-off events. For 15687/16163 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 69622 event pairs, 3765 based on Foata normal form. 367/10243 useless extension candidates. Maximal degree in co-relation 19619. Up to 5808 conditions per place. [2024-11-09 10:58:03,333 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 135 selfloop transitions, 38 changer transitions 0/188 dead transitions. [2024-11-09 10:58:03,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 188 transitions, 1332 flow [2024-11-09 10:58:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:58:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:58:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 580 transitions. [2024-11-09 10:58:03,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5430711610486891 [2024-11-09 10:58:03,336 INFO L175 Difference]: Start difference. First operand has 127 places, 109 transitions, 665 flow. Second operand 12 states and 580 transitions. [2024-11-09 10:58:03,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 188 transitions, 1332 flow [2024-11-09 10:58:03,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 188 transitions, 1284 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:58:03,352 INFO L231 Difference]: Finished difference. Result has 135 places, 113 transitions, 753 flow [2024-11-09 10:58:03,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=753, PETRI_PLACES=135, PETRI_TRANSITIONS=113} [2024-11-09 10:58:03,353 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 49 predicate places. [2024-11-09 10:58:03,353 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 113 transitions, 753 flow [2024-11-09 10:58:03,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-09 10:58:03,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:03,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:58:03,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:58:03,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:03,555 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:58:03,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1607383876, now seen corresponding path program 2 times [2024-11-09 10:58:03,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:03,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927208197] [2024-11-09 10:58:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927208197] [2024-11-09 10:58:03,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927208197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541069144] [2024-11-09 10:58:03,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:58:03,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:03,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:03,777 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:03,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:58:03,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:58:03,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:03,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:58:03,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 10:58:03,924 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:58:03,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541069144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:58:03,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:58:03,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 10:58:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21620359] [2024-11-09 10:58:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:58:03,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:58:03,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:58:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:58:03,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-09 10:58:03,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 113 transitions, 753 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2024-11-09 10:58:03,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:03,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-09 10:58:03,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:04,900 INFO L124 PetriNetUnfolderBase]: 7638/11370 cut-off events. [2024-11-09 10:58:04,901 INFO L125 PetriNetUnfolderBase]: For 19111/19927 co-relation queries the response was YES. [2024-11-09 10:58:04,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34815 conditions, 11370 events. 7638/11370 cut-off events. For 19111/19927 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 66667 event pairs, 1164 based on Foata normal form. 558/10593 useless extension candidates. Maximal degree in co-relation 20204. Up to 6915 conditions per place. [2024-11-09 10:58:04,953 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 177 selfloop transitions, 9 changer transitions 0/199 dead transitions. [2024-11-09 10:58:04,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 199 transitions, 1565 flow [2024-11-09 10:58:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:58:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:58:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 322 transitions. [2024-11-09 10:58:04,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.602996254681648 [2024-11-09 10:58:04,955 INFO L175 Difference]: Start difference. First operand has 135 places, 113 transitions, 753 flow. Second operand 6 states and 322 transitions. [2024-11-09 10:58:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 199 transitions, 1565 flow [2024-11-09 10:58:04,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 199 transitions, 1496 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-09 10:58:04,973 INFO L231 Difference]: Finished difference. Result has 136 places, 119 transitions, 748 flow [2024-11-09 10:58:04,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2024-11-09 10:58:04,974 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 50 predicate places. [2024-11-09 10:58:04,974 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 748 flow [2024-11-09 10:58:04,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2024-11-09 10:58:04,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:04,974 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:58:04,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:58:05,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:58:05,175 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:58:05,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2087372679, now seen corresponding path program 1 times [2024-11-09 10:58:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:05,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700097157] [2024-11-09 10:58:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:05,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700097157] [2024-11-09 10:58:05,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700097157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:05,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800848815] [2024-11-09 10:58:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:05,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:05,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:05,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:05,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:58:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:05,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:58:05,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:05,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:58:05,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800848815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:05,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:05,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-09 10:58:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594354554] [2024-11-09 10:58:05,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:05,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:58:05,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:58:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:58:05,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:58:05,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 748 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-09 10:58:05,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:05,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:58:05,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:06,759 INFO L124 PetriNetUnfolderBase]: 5472/8943 cut-off events. [2024-11-09 10:58:06,760 INFO L125 PetriNetUnfolderBase]: For 17807/18286 co-relation queries the response was YES. [2024-11-09 10:58:06,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28747 conditions, 8943 events. 5472/8943 cut-off events. For 17807/18286 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 56269 event pairs, 3028 based on Foata normal form. 0/7868 useless extension candidates. Maximal degree in co-relation 20596. Up to 4982 conditions per place. [2024-11-09 10:58:06,838 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 137 selfloop transitions, 38 changer transitions 0/192 dead transitions. [2024-11-09 10:58:06,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 192 transitions, 1466 flow [2024-11-09 10:58:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:58:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:58:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 572 transitions. [2024-11-09 10:58:06,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5355805243445693 [2024-11-09 10:58:06,840 INFO L175 Difference]: Start difference. First operand has 136 places, 119 transitions, 748 flow. Second operand 12 states and 572 transitions. [2024-11-09 10:58:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 192 transitions, 1466 flow [2024-11-09 10:58:06,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 192 transitions, 1458 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-09 10:58:06,882 INFO L231 Difference]: Finished difference. Result has 150 places, 123 transitions, 877 flow [2024-11-09 10:58:06,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=877, PETRI_PLACES=150, PETRI_TRANSITIONS=123} [2024-11-09 10:58:06,883 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 64 predicate places. [2024-11-09 10:58:06,883 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 123 transitions, 877 flow [2024-11-09 10:58:06,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-09 10:58:06,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:06,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:58:06,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 10:58:07,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:07,084 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:58:07,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash 616104379, now seen corresponding path program 1 times [2024-11-09 10:58:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807646052] [2024-11-09 10:58:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:58:07,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:07,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807646052] [2024-11-09 10:58:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807646052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:58:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:58:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:58:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388386886] [2024-11-09 10:58:07,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:58:07,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:58:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:58:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:58:07,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-09 10:58:07,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 123 transitions, 877 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 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) [2024-11-09 10:58:07,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:07,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-09 10:58:07,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:08,434 INFO L124 PetriNetUnfolderBase]: 8789/14086 cut-off events. [2024-11-09 10:58:08,434 INFO L125 PetriNetUnfolderBase]: For 32575/33687 co-relation queries the response was YES. [2024-11-09 10:58:08,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47083 conditions, 14086 events. 8789/14086 cut-off events. For 32575/33687 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 95011 event pairs, 1554 based on Foata normal form. 201/12408 useless extension candidates. Maximal degree in co-relation 33099. Up to 6053 conditions per place. [2024-11-09 10:58:08,599 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 164 selfloop transitions, 17 changer transitions 17/216 dead transitions. [2024-11-09 10:58:08,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 216 transitions, 1819 flow [2024-11-09 10:58:08,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:58:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:58:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 366 transitions. [2024-11-09 10:58:08,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5874799357945425 [2024-11-09 10:58:08,601 INFO L175 Difference]: Start difference. First operand has 150 places, 123 transitions, 877 flow. Second operand 7 states and 366 transitions. [2024-11-09 10:58:08,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 216 transitions, 1819 flow [2024-11-09 10:58:08,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 216 transitions, 1750 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-09 10:58:08,642 INFO L231 Difference]: Finished difference. Result has 150 places, 120 transitions, 815 flow [2024-11-09 10:58:08,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=815, PETRI_PLACES=150, PETRI_TRANSITIONS=120} [2024-11-09 10:58:08,642 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 64 predicate places. [2024-11-09 10:58:08,643 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 120 transitions, 815 flow [2024-11-09 10:58:08,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 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) [2024-11-09 10:58:08,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:08,643 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:58:08,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 10:58:08,643 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-09 10:58:08,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2022148350, now seen corresponding path program 1 times [2024-11-09 10:58:08,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:08,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680787442] [2024-11-09 10:58:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 10:58:08,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:08,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680787442] [2024-11-09 10:58:08,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680787442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:58:08,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:58:08,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:58:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236638322] [2024-11-09 10:58:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:58:08,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:58:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:58:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:58:08,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-09 10:58:08,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 120 transitions, 815 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-09 10:58:08,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:08,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-09 10:58:08,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:11,443 INFO L124 PetriNetUnfolderBase]: 14404/23092 cut-off events. [2024-11-09 10:58:11,443 INFO L125 PetriNetUnfolderBase]: For 50908/52466 co-relation queries the response was YES. [2024-11-09 10:58:11,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81603 conditions, 23092 events. 14404/23092 cut-off events. For 50908/52466 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 174625 event pairs, 4606 based on Foata normal form. 486/21034 useless extension candidates. Maximal degree in co-relation 58301. Up to 10903 conditions per place.