./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:40:34,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:40:34,871 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:40:34,885 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:40:34,886 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:40:34,932 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:40:34,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:40:34,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:40:34,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:40:34,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:40:34,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:40:34,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:40:34,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:40:34,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:40:34,936 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:40:34,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:40:34,939 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:40:34,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:40:34,940 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:40:34,940 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:40:34,940 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:40:34,944 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:40:34,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:40:34,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:40:34,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:40:34,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:40:34,945 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:40:34,946 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:40:34,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:40:34,946 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:40:34,946 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:40:34,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:40:34,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:40:34,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:40:34,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:40:34,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:40:34,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:40:34,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:40:34,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:40:34,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:40:34,953 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:40:34,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:40:34,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-11-20 17:40:35,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:40:35,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:40:35,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:40:35,231 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:40:35,232 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:40:35,233 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-20 17:40:36,724 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:40:36,942 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:40:36,946 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-20 17:40:36,957 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ca2c74e/4c3ac4e101e64b3fb9b8d56eb9e95cad/FLAG03da73f89 [2024-11-20 17:40:36,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ca2c74e/4c3ac4e101e64b3fb9b8d56eb9e95cad [2024-11-20 17:40:36,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:40:36,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:40:36,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:40:36,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:40:36,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:40:36,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:40:36" (1/1) ... [2024-11-20 17:40:36,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b5974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:36, skipping insertion in model container [2024-11-20 17:40:36,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:40:36" (1/1) ... [2024-11-20 17:40:37,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:40:37,312 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:40:37,319 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:40:37,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:40:37,330 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:40:37,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:40:37,376 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:40:37,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37 WrapperNode [2024-11-20 17:40:37,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:40:37,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:40:37,378 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:40:37,378 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:40:37,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,429 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 291 [2024-11-20 17:40:37,432 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:40:37,433 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:40:37,433 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:40:37,433 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:40:37,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,446 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,474 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [6, 2, 10]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [0, 2, 0]. The 4 writes are split as follows [2, 0, 2]. [2024-11-20 17:40:37,475 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,502 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,509 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:40:37,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:40:37,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:40:37,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:40:37,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (1/1) ... [2024-11-20 17:40:37,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:40:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:37,543 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) [2024-11-20 17:40:37,546 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 [2024-11-20 17:40:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:40:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:40:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:40:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:40:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:40:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:40:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:40:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-20 17:40:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:40:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:40:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-20 17:40:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:40:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:40:37,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:40:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:40:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:40:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-20 17:40:37,593 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:40:37,702 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:40:37,704 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:40:38,281 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:40:38,281 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:40:38,660 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:40:38,660 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:40:38,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:40:38 BoogieIcfgContainer [2024-11-20 17:40:38,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:40:38,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:40:38,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:40:38,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:40:38,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:40:36" (1/3) ... [2024-11-20 17:40:38,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584c7807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:40:38, skipping insertion in model container [2024-11-20 17:40:38,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:40:37" (2/3) ... [2024-11-20 17:40:38,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584c7807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:40:38, skipping insertion in model container [2024-11-20 17:40:38,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:40:38" (3/3) ... [2024-11-20 17:40:38,670 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2024-11-20 17:40:38,688 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:40:38,689 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-20 17:40:38,689 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:40:38,754 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:40:38,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 82 transitions, 178 flow [2024-11-20 17:40:38,833 INFO L124 PetriNetUnfolderBase]: 8/80 cut-off events. [2024-11-20 17:40:38,834 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:40:38,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 8/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 220 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-20 17:40:38,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 82 transitions, 178 flow [2024-11-20 17:40:38,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 79 transitions, 170 flow [2024-11-20 17:40:38,855 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:40:38,863 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;@72d95b59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:40:38,863 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-20 17:40:38,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:40:38,867 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:40:38,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:40:38,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:38,869 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:40:38,869 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:38,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 930278, now seen corresponding path program 1 times [2024-11-20 17:40:38,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:38,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895560204] [2024-11-20 17:40:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:40:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:39,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895560204] [2024-11-20 17:40:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895560204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:39,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:39,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:40:39,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939660201] [2024-11-20 17:40:39,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:39,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:40:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:40:39,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:40:39,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:39,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:39,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:39,522 INFO L124 PetriNetUnfolderBase]: 192/580 cut-off events. [2024-11-20 17:40:39,522 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-20 17:40:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 580 events. 192/580 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3512 event pairs, 113 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 827. Up to 301 conditions per place. [2024-11-20 17:40:39,530 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-11-20 17:40:39,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 230 flow [2024-11-20 17:40:39,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:40:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:40:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-11-20 17:40:39,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6869918699186992 [2024-11-20 17:40:39,547 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 170 flow. Second operand 3 states and 169 transitions. [2024-11-20 17:40:39,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 230 flow [2024-11-20 17:40:39,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:40:39,559 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 158 flow [2024-11-20 17:40:39,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-11-20 17:40:39,567 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2024-11-20 17:40:39,567 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 158 flow [2024-11-20 17:40:39,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:39,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:39,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:40:39,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:40:39,569 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:39,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 930279, now seen corresponding path program 1 times [2024-11-20 17:40:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474163590] [2024-11-20 17:40:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:40:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474163590] [2024-11-20 17:40:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474163590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:39,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:39,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:40:39,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577410021] [2024-11-20 17:40:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:39,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:39,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:39,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:40:40,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:40,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:40,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:40,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:40,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:40,324 INFO L124 PetriNetUnfolderBase]: 192/582 cut-off events. [2024-11-20 17:40:40,324 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:40:40,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 582 events. 192/582 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3510 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 877. Up to 309 conditions per place. [2024-11-20 17:40:40,332 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 36 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-11-20 17:40:40,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 238 flow [2024-11-20 17:40:40,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:40:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:40:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2024-11-20 17:40:40,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-11-20 17:40:40,336 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 158 flow. Second operand 3 states and 172 transitions. [2024-11-20 17:40:40,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 238 flow [2024-11-20 17:40:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:40,340 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 168 flow [2024-11-20 17:40:40,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-11-20 17:40:40,342 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2024-11-20 17:40:40,342 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 168 flow [2024-11-20 17:40:40,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:40,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:40,343 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:40:40,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:40:40,344 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:40,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 894027941, now seen corresponding path program 1 times [2024-11-20 17:40:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:40,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755072333] [2024-11-20 17:40:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:40:40,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:40,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755072333] [2024-11-20 17:40:40,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755072333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:40,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862542165] [2024-11-20 17:40:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:40,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:40,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:40,713 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) [2024-11-20 17:40:40,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:40:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:40,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:40:40,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:41,029 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 [2024-11-20 17:40:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:40:41,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:40:41,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862542165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:41,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:41,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:40:41,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357666195] [2024-11-20 17:40:41,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:41,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:40:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:40:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:40:42,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:42,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:42,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:42,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:42,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:42,961 INFO L124 PetriNetUnfolderBase]: 192/581 cut-off events. [2024-11-20 17:40:42,961 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:40:42,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 581 events. 192/581 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3510 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 893. Up to 305 conditions per place. [2024-11-20 17:40:42,967 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-20 17:40:42,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 240 flow [2024-11-20 17:40:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:40:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:40:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2024-11-20 17:40:42,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-11-20 17:40:42,970 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 168 flow. Second operand 5 states and 258 transitions. [2024-11-20 17:40:42,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 240 flow [2024-11-20 17:40:42,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:40:42,975 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 180 flow [2024-11-20 17:40:42,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2024-11-20 17:40:42,977 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-11-20 17:40:42,977 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 180 flow [2024-11-20 17:40:42,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:42,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:42,978 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:40:42,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:40:43,178 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 [2024-11-20 17:40:43,179 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:43,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1945063750, now seen corresponding path program 1 times [2024-11-20 17:40:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701276741] [2024-11-20 17:40:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:43,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:43,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701276741] [2024-11-20 17:40:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701276741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:40:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226938517] [2024-11-20 17:40:43,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:43,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:40:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:40:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:40:43,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:43,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 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) [2024-11-20 17:40:43,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:43,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:43,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:43,725 INFO L124 PetriNetUnfolderBase]: 193/584 cut-off events. [2024-11-20 17:40:43,725 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:40:43,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 584 events. 193/584 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3522 event pairs, 113 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 891. Up to 308 conditions per place. [2024-11-20 17:40:43,730 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 35 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-20 17:40:43,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 266 flow [2024-11-20 17:40:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2024-11-20 17:40:43,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2024-11-20 17:40:43,733 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 180 flow. Second operand 4 states and 217 transitions. [2024-11-20 17:40:43,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 266 flow [2024-11-20 17:40:43,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 79 transitions, 256 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 17:40:43,737 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 195 flow [2024-11-20 17:40:43,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-11-20 17:40:43,739 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2024-11-20 17:40:43,739 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 195 flow [2024-11-20 17:40:43,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 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) [2024-11-20 17:40:43,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:43,740 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:43,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:40:43,741 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:43,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:43,741 INFO L85 PathProgramCache]: Analyzing trace with hash 167435176, now seen corresponding path program 1 times [2024-11-20 17:40:43,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:43,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545443149] [2024-11-20 17:40:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:43,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:43,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:43,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545443149] [2024-11-20 17:40:43,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545443149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:43,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:40:43,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389123774] [2024-11-20 17:40:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:43,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:40:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:40:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:40:43,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:43,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 195 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 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) [2024-11-20 17:40:43,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:43,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:44,105 INFO L124 PetriNetUnfolderBase]: 193/582 cut-off events. [2024-11-20 17:40:44,105 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:40:44,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 582 events. 193/582 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3518 event pairs, 113 based on Foata normal form. 0/431 useless extension candidates. Maximal degree in co-relation 895. Up to 305 conditions per place. [2024-11-20 17:40:44,113 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 35 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-11-20 17:40:44,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 267 flow [2024-11-20 17:40:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:40:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:40:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-20 17:40:44,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-11-20 17:40:44,114 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 195 flow. Second operand 3 states and 168 transitions. [2024-11-20 17:40:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 267 flow [2024-11-20 17:40:44,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:44,119 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 192 flow [2024-11-20 17:40:44,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-11-20 17:40:44,120 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-11-20 17:40:44,124 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 192 flow [2024-11-20 17:40:44,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 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) [2024-11-20 17:40:44,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:44,125 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:44,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:40:44,125 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:44,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:44,125 INFO L85 PathProgramCache]: Analyzing trace with hash 167435177, now seen corresponding path program 1 times [2024-11-20 17:40:44,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:44,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284225365] [2024-11-20 17:40:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:44,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:44,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284225365] [2024-11-20 17:40:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284225365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:40:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113135055] [2024-11-20 17:40:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:44,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:40:44,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:40:44,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:44,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:44,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:40:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:44,526 INFO L124 PetriNetUnfolderBase]: 192/581 cut-off events. [2024-11-20 17:40:44,526 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:40:44,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 581 events. 192/581 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3507 event pairs, 113 based on Foata normal form. 1/432 useless extension candidates. Maximal degree in co-relation 892. Up to 306 conditions per place. [2024-11-20 17:40:44,534 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 34 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-11-20 17:40:44,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 264 flow [2024-11-20 17:40:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2024-11-20 17:40:44,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6798780487804879 [2024-11-20 17:40:44,540 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 192 flow. Second operand 4 states and 223 transitions. [2024-11-20 17:40:44,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 264 flow [2024-11-20 17:40:44,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 76 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:44,542 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 190 flow [2024-11-20 17:40:44,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-20 17:40:44,547 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2024-11-20 17:40:44,548 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 190 flow [2024-11-20 17:40:44,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:40:44,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:44,548 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:44,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:40:44,549 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:44,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 895521136, now seen corresponding path program 1 times [2024-11-20 17:40:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647517899] [2024-11-20 17:40:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:44,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647517899] [2024-11-20 17:40:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647517899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149429588] [2024-11-20 17:40:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:44,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:44,825 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) [2024-11-20 17:40:44,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:40:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:44,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:40:44,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:44,929 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 [2024-11-20 17:40:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:45,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:45,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149429588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:45,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:45,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:40:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483816703] [2024-11-20 17:40:45,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:45,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:40:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:40:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:40:46,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2024-11-20 17:40:46,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 44.61538461538461) internal successors, (580), 13 states have internal predecessors, (580), 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) [2024-11-20 17:40:46,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:46,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2024-11-20 17:40:46,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:46,825 INFO L124 PetriNetUnfolderBase]: 215/642 cut-off events. [2024-11-20 17:40:46,826 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:40:46,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 642 events. 215/642 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4006 event pairs, 130 based on Foata normal form. 0/468 useless extension candidates. Maximal degree in co-relation 987. Up to 335 conditions per place. [2024-11-20 17:40:46,831 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 29 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-11-20 17:40:46,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 81 transitions, 306 flow [2024-11-20 17:40:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:40:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:40:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 434 transitions. [2024-11-20 17:40:46,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-11-20 17:40:46,833 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 190 flow. Second operand 9 states and 434 transitions. [2024-11-20 17:40:46,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 81 transitions, 306 flow [2024-11-20 17:40:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 296 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:40:46,836 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 238 flow [2024-11-20 17:40:46,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=238, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2024-11-20 17:40:46,837 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2024-11-20 17:40:46,838 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 238 flow [2024-11-20 17:40:46,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 44.61538461538461) internal successors, (580), 13 states have internal predecessors, (580), 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) [2024-11-20 17:40:46,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:46,838 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:46,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:40:47,047 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,SelfDestructingSolverStorable6 [2024-11-20 17:40:47,047 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:47,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1991352511, now seen corresponding path program 1 times [2024-11-20 17:40:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:47,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58144018] [2024-11-20 17:40:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:47,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58144018] [2024-11-20 17:40:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58144018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:40:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590547386] [2024-11-20 17:40:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:47,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:40:47,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:40:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:40:47,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:47,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 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) [2024-11-20 17:40:47,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:47,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:47,444 INFO L124 PetriNetUnfolderBase]: 194/588 cut-off events. [2024-11-20 17:40:47,444 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-20 17:40:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 588 events. 194/588 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3511 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 910. Up to 317 conditions per place. [2024-11-20 17:40:47,449 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 44 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-11-20 17:40:47,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 338 flow [2024-11-20 17:40:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-11-20 17:40:47,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-11-20 17:40:47,451 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 238 flow. Second operand 4 states and 216 transitions. [2024-11-20 17:40:47,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 338 flow [2024-11-20 17:40:47,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 319 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 17:40:47,454 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 238 flow [2024-11-20 17:40:47,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2024-11-20 17:40:47,457 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-11-20 17:40:47,457 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 238 flow [2024-11-20 17:40:47,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 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) [2024-11-20 17:40:47,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:47,459 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:47,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:40:47,459 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:47,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1865621323, now seen corresponding path program 1 times [2024-11-20 17:40:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:47,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051914171] [2024-11-20 17:40:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:47,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:47,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051914171] [2024-11-20 17:40:47,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051914171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:47,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158461431] [2024-11-20 17:40:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:47,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:47,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:47,588 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) [2024-11-20 17:40:47,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:40:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:47,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:40:47,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:47,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:47,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158461431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:47,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:47,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:40:47,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9941065] [2024-11-20 17:40:47,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:47,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:40:47,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:40:47,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:40:47,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:40:47,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 238 flow. Second operand has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 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) [2024-11-20 17:40:47,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:47,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:40:47,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:48,332 INFO L124 PetriNetUnfolderBase]: 377/1135 cut-off events. [2024-11-20 17:40:48,332 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-20 17:40:48,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1818 conditions, 1135 events. 377/1135 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8187 event pairs, 225 based on Foata normal form. 1/851 useless extension candidates. Maximal degree in co-relation 903. Up to 301 conditions per place. [2024-11-20 17:40:48,339 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 59 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-11-20 17:40:48,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 499 flow [2024-11-20 17:40:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:40:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:40:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 485 transitions. [2024-11-20 17:40:48,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571815718157181 [2024-11-20 17:40:48,341 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 238 flow. Second operand 9 states and 485 transitions. [2024-11-20 17:40:48,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 499 flow [2024-11-20 17:40:48,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 491 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:48,346 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 354 flow [2024-11-20 17:40:48,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=354, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-11-20 17:40:48,348 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-11-20 17:40:48,348 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 354 flow [2024-11-20 17:40:48,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 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) [2024-11-20 17:40:48,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:48,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:48,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:40:48,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:48,554 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:48,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1999684621, now seen corresponding path program 1 times [2024-11-20 17:40:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12145615] [2024-11-20 17:40:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:48,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12145615] [2024-11-20 17:40:48,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12145615] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243424353] [2024-11-20 17:40:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:48,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:48,953 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) [2024-11-20 17:40:48,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:40:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:49,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:40:49,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:49,251 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 [2024-11-20 17:40:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:40:49,265 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:40:49,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243424353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:49,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:40:49,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-20 17:40:49,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051277724] [2024-11-20 17:40:49,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:49,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:49,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:49,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:49,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:40:49,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2024-11-20 17:40:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:49,532 INFO L124 PetriNetUnfolderBase]: 386/1170 cut-off events. [2024-11-20 17:40:49,532 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-20 17:40:49,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 1170 events. 386/1170 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8483 event pairs, 226 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 932. Up to 630 conditions per place. [2024-11-20 17:40:49,539 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 55 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2024-11-20 17:40:49,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 480 flow [2024-11-20 17:40:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2024-11-20 17:40:49,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-11-20 17:40:49,540 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 354 flow. Second operand 4 states and 216 transitions. [2024-11-20 17:40:49,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 480 flow [2024-11-20 17:40:49,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 476 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:40:49,544 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 374 flow [2024-11-20 17:40:49,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=374, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-11-20 17:40:49,545 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2024-11-20 17:40:49,545 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 374 flow [2024-11-20 17:40:49,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2024-11-20 17:40:49,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:49,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:49,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:40:49,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:49,751 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:49,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2128402803, now seen corresponding path program 2 times [2024-11-20 17:40:49,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:49,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706776571] [2024-11-20 17:40:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:50,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706776571] [2024-11-20 17:40:50,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706776571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:50,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788555423] [2024-11-20 17:40:50,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:50,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:50,149 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) [2024-11-20 17:40:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:40:50,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:40:50,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:50,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:40:50,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:50,363 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 8 treesize of output 1 [2024-11-20 17:40:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:50,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788555423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:50,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-20 17:40:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532477279] [2024-11-20 17:40:50,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:50,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:40:50,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:40:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:40:51,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:51,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 374 flow. Second operand has 20 states, 20 states have (on average 45.95) internal successors, (919), 20 states have internal predecessors, (919), 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) [2024-11-20 17:40:51,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:51,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:51,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:52,644 INFO L124 PetriNetUnfolderBase]: 567/1703 cut-off events. [2024-11-20 17:40:52,645 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-20 17:40:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2830 conditions, 1703 events. 567/1703 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13424 event pairs, 337 based on Foata normal form. 0/1285 useless extension candidates. Maximal degree in co-relation 933. Up to 313 conditions per place. [2024-11-20 17:40:52,658 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 115 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-11-20 17:40:52,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 947 flow [2024-11-20 17:40:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:40:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:40:52,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 735 transitions. [2024-11-20 17:40:52,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-11-20 17:40:52,662 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 374 flow. Second operand 14 states and 735 transitions. [2024-11-20 17:40:52,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 947 flow [2024-11-20 17:40:52,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 934 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:52,667 INFO L231 Difference]: Finished difference. Result has 110 places, 109 transitions, 570 flow [2024-11-20 17:40:52,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=570, PETRI_PLACES=110, PETRI_TRANSITIONS=109} [2024-11-20 17:40:52,668 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 32 predicate places. [2024-11-20 17:40:52,668 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 109 transitions, 570 flow [2024-11-20 17:40:52,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 45.95) internal successors, (919), 20 states have internal predecessors, (919), 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) [2024-11-20 17:40:52,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:52,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:52,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:40:52,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-20 17:40:52,874 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:52,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1846392371, now seen corresponding path program 1 times [2024-11-20 17:40:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:52,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550895640] [2024-11-20 17:40:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:40:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550895640] [2024-11-20 17:40:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550895640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:52,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:52,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:40:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565720323] [2024-11-20 17:40:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:52,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:40:52,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:40:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 109 transitions, 570 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2024-11-20 17:40:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:40:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:53,397 INFO L124 PetriNetUnfolderBase]: 578/1758 cut-off events. [2024-11-20 17:40:53,398 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-20 17:40:53,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2947 conditions, 1758 events. 578/1758 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13946 event pairs, 339 based on Foata normal form. 3/1314 useless extension candidates. Maximal degree in co-relation 2001. Up to 941 conditions per place. [2024-11-20 17:40:53,417 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 66 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2024-11-20 17:40:53,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 109 transitions, 712 flow [2024-11-20 17:40:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:40:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:40:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2024-11-20 17:40:53,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2024-11-20 17:40:53,419 INFO L175 Difference]: Start difference. First operand has 110 places, 109 transitions, 570 flow. Second operand 4 states and 221 transitions. [2024-11-20 17:40:53,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 109 transitions, 712 flow [2024-11-20 17:40:53,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 665 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-20 17:40:53,423 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 531 flow [2024-11-20 17:40:53,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=531, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2024-11-20 17:40:53,424 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2024-11-20 17:40:53,424 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 531 flow [2024-11-20 17:40:53,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2024-11-20 17:40:53,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:53,424 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:53,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:40:53,426 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:53,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1846508568, now seen corresponding path program 1 times [2024-11-20 17:40:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:53,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494575483] [2024-11-20 17:40:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494575483] [2024-11-20 17:40:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494575483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640947597] [2024-11-20 17:40:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:53,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:53,573 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) [2024-11-20 17:40:53,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:40:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:53,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:40:53,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:53,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:53,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640947597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:53,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:53,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-20 17:40:53,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813979801] [2024-11-20 17:40:53,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:53,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:40:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:40:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:40:53,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:40:53,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 531 flow. Second operand has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 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) [2024-11-20 17:40:53,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:53,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:40:53,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:54,542 INFO L124 PetriNetUnfolderBase]: 1122/3384 cut-off events. [2024-11-20 17:40:54,542 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-20 17:40:54,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5521 conditions, 3384 events. 1122/3384 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 31082 event pairs, 675 based on Foata normal form. 3/2543 useless extension candidates. Maximal degree in co-relation 3689. Up to 900 conditions per place. [2024-11-20 17:40:54,566 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 75 selfloop transitions, 31 changer transitions 0/143 dead transitions. [2024-11-20 17:40:54,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 143 transitions, 886 flow [2024-11-20 17:40:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:40:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:40:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 436 transitions. [2024-11-20 17:40:54,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-11-20 17:40:54,568 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 531 flow. Second operand 8 states and 436 transitions. [2024-11-20 17:40:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 143 transitions, 886 flow [2024-11-20 17:40:54,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:40:54,573 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 655 flow [2024-11-20 17:40:54,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=655, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2024-11-20 17:40:54,574 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 36 predicate places. [2024-11-20 17:40:54,574 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 655 flow [2024-11-20 17:40:54,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 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) [2024-11-20 17:40:54,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:54,575 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:54,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:40:54,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:54,779 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:54,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash 990690409, now seen corresponding path program 3 times [2024-11-20 17:40:54,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:54,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231567033] [2024-11-20 17:40:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:54,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:40:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231567033] [2024-11-20 17:40:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231567033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551351986] [2024-11-20 17:40:54,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:40:54,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:54,955 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) [2024-11-20 17:40:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:40:55,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:40:55,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:55,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:40:55,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:55,053 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 [2024-11-20 17:40:55,100 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 17 treesize of output 13 [2024-11-20 17:40:55,139 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 7 [2024-11-20 17:40:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:40:55,252 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:40:55,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551351986] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:55,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:55,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-20 17:40:55,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279565307] [2024-11-20 17:40:55,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:55,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:40:55,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:40:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:40:56,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:56,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 655 flow. Second operand has 21 states, 21 states have (on average 45.95238095238095) internal successors, (965), 21 states have internal predecessors, (965), 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) [2024-11-20 17:40:56,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:56,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:56,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:57,245 INFO L124 PetriNetUnfolderBase]: 1127/3405 cut-off events. [2024-11-20 17:40:57,245 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2024-11-20 17:40:57,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5584 conditions, 3405 events. 1127/3405 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 31466 event pairs, 676 based on Foata normal form. 2/2543 useless extension candidates. Maximal degree in co-relation 3802. Up to 1196 conditions per place. [2024-11-20 17:40:57,278 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 68 selfloop transitions, 44 changer transitions 0/147 dead transitions. [2024-11-20 17:40:57,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 147 transitions, 1011 flow [2024-11-20 17:40:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:40:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:40:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 918 transitions. [2024-11-20 17:40:57,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5892169448010269 [2024-11-20 17:40:57,282 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 655 flow. Second operand 19 states and 918 transitions. [2024-11-20 17:40:57,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 147 transitions, 1011 flow [2024-11-20 17:40:57,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 147 transitions, 973 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:40:57,287 INFO L231 Difference]: Finished difference. Result has 129 places, 118 transitions, 743 flow [2024-11-20 17:40:57,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=743, PETRI_PLACES=129, PETRI_TRANSITIONS=118} [2024-11-20 17:40:57,288 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 51 predicate places. [2024-11-20 17:40:57,288 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 118 transitions, 743 flow [2024-11-20 17:40:57,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 45.95238095238095) internal successors, (965), 21 states have internal predecessors, (965), 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) [2024-11-20 17:40:57,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:57,289 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:57,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:40:57,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:57,490 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:40:57,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1050936814, now seen corresponding path program 2 times [2024-11-20 17:40:57,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:57,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349341009] [2024-11-20 17:40:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:40:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349341009] [2024-11-20 17:40:57,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349341009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:57,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913308402] [2024-11-20 17:40:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:57,832 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) [2024-11-20 17:40:57,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:40:57,944 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:40:57,944 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:57,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:40:57,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:58,008 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 [2024-11-20 17:40:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:40:58,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:40:58,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913308402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:58,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:58,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 18 [2024-11-20 17:40:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076237559] [2024-11-20 17:40:58,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:58,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:40:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:40:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:40:59,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:40:59,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 118 transitions, 743 flow. Second operand has 19 states, 19 states have (on average 46.421052631578945) internal successors, (882), 19 states have internal predecessors, (882), 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) [2024-11-20 17:40:59,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:59,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:40:59,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:00,191 INFO L124 PetriNetUnfolderBase]: 1690/5103 cut-off events. [2024-11-20 17:41:00,192 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-20 17:41:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8375 conditions, 5103 events. 1690/5103 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 50294 event pairs, 1014 based on Foata normal form. 3/3816 useless extension candidates. Maximal degree in co-relation 5621. Up to 1810 conditions per place. [2024-11-20 17:41:00,224 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 85 selfloop transitions, 50 changer transitions 0/170 dead transitions. [2024-11-20 17:41:00,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 170 transitions, 1320 flow [2024-11-20 17:41:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:41:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:41:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 829 transitions. [2024-11-20 17:41:00,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5946915351506457 [2024-11-20 17:41:00,229 INFO L175 Difference]: Start difference. First operand has 129 places, 118 transitions, 743 flow. Second operand 17 states and 829 transitions. [2024-11-20 17:41:00,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 170 transitions, 1320 flow [2024-11-20 17:41:00,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 170 transitions, 1127 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-11-20 17:41:00,236 INFO L231 Difference]: Finished difference. Result has 134 places, 136 transitions, 873 flow [2024-11-20 17:41:00,236 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=873, PETRI_PLACES=134, PETRI_TRANSITIONS=136} [2024-11-20 17:41:00,237 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 56 predicate places. [2024-11-20 17:41:00,238 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 136 transitions, 873 flow [2024-11-20 17:41:00,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.421052631578945) internal successors, (882), 19 states have internal predecessors, (882), 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) [2024-11-20 17:41:00,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:00,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:00,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:41:00,439 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,SelfDestructingSolverStorable14 [2024-11-20 17:41:00,439 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:00,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -673093502, now seen corresponding path program 1 times [2024-11-20 17:41:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:00,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217299641] [2024-11-20 17:41:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217299641] [2024-11-20 17:41:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217299641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:00,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:00,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:00,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678463554] [2024-11-20 17:41:00,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:00,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:00,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:00,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2024-11-20 17:41:00,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 136 transitions, 873 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2024-11-20 17:41:00,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:00,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2024-11-20 17:41:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:01,363 INFO L124 PetriNetUnfolderBase]: 1909/5235 cut-off events. [2024-11-20 17:41:01,363 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-11-20 17:41:01,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 5235 events. 1909/5235 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 49623 event pairs, 1179 based on Foata normal form. 0/4245 useless extension candidates. Maximal degree in co-relation 5961. Up to 3066 conditions per place. [2024-11-20 17:41:01,393 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 89 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2024-11-20 17:41:01,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 132 transitions, 1069 flow [2024-11-20 17:41:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-11-20 17:41:01,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-11-20 17:41:01,395 INFO L175 Difference]: Start difference. First operand has 134 places, 136 transitions, 873 flow. Second operand 5 states and 234 transitions. [2024-11-20 17:41:01,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 132 transitions, 1069 flow [2024-11-20 17:41:01,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 132 transitions, 963 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-11-20 17:41:01,402 INFO L231 Difference]: Finished difference. Result has 126 places, 132 transitions, 785 flow [2024-11-20 17:41:01,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=785, PETRI_PLACES=126, PETRI_TRANSITIONS=132} [2024-11-20 17:41:01,402 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 48 predicate places. [2024-11-20 17:41:01,403 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 132 transitions, 785 flow [2024-11-20 17:41:01,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 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) [2024-11-20 17:41:01,403 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:01,403 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:01,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:41:01,404 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:01,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -673093501, now seen corresponding path program 1 times [2024-11-20 17:41:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:01,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833186105] [2024-11-20 17:41:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:01,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833186105] [2024-11-20 17:41:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833186105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:01,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768336915] [2024-11-20 17:41:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:01,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:01,760 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) [2024-11-20 17:41:01,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:41:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:01,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:41:01,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:01,867 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 [2024-11-20 17:41:01,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:01,932 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 19 treesize of output 14 [2024-11-20 17:41:01,951 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:41:01,952 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 [2024-11-20 17:41:02,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:02,019 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 19 treesize of output 14 [2024-11-20 17:41:02,036 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:41:02,036 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 [2024-11-20 17:41:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:02,064 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 19 treesize of output 14 [2024-11-20 17:41:02,073 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:02,073 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 [2024-11-20 17:41:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:02,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:41:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768336915] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:02,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:41:02,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-20 17:41:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793695412] [2024-11-20 17:41:02,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:02,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:41:02,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:41:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:02,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2024-11-20 17:41:02,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 132 transitions, 785 flow. Second operand has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:02,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:02,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2024-11-20 17:41:02,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:02,875 INFO L124 PetriNetUnfolderBase]: 1909/4956 cut-off events. [2024-11-20 17:41:02,876 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-20 17:41:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8488 conditions, 4956 events. 1909/4956 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 44776 event pairs, 1179 based on Foata normal form. 0/3960 useless extension candidates. Maximal degree in co-relation 5731. Up to 3093 conditions per place. [2024-11-20 17:41:02,901 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 98 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2024-11-20 17:41:02,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 981 flow [2024-11-20 17:41:02,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:02,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2024-11-20 17:41:02,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-11-20 17:41:02,903 INFO L175 Difference]: Start difference. First operand has 126 places, 132 transitions, 785 flow. Second operand 4 states and 179 transitions. [2024-11-20 17:41:02,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 981 flow [2024-11-20 17:41:02,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 128 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:02,908 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 768 flow [2024-11-20 17:41:02,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=768, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-11-20 17:41:02,909 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 44 predicate places. [2024-11-20 17:41:02,909 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 768 flow [2024-11-20 17:41:02,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.5) internal successors, (225), 6 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:02,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:02,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:02,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:41:03,113 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,SelfDestructingSolverStorable16 [2024-11-20 17:41:03,114 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:03,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash 608938947, now seen corresponding path program 1 times [2024-11-20 17:41:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534144380] [2024-11-20 17:41:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:03,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:03,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534144380] [2024-11-20 17:41:03,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534144380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:03,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:03,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:03,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612694043] [2024-11-20 17:41:03,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:03,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:03,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:03,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2024-11-20 17:41:03,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 768 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-11-20 17:41:03,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:03,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2024-11-20 17:41:03,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:03,776 INFO L124 PetriNetUnfolderBase]: 1945/4704 cut-off events. [2024-11-20 17:41:03,777 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-20 17:41:03,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8272 conditions, 4704 events. 1945/4704 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39969 event pairs, 1197 based on Foata normal form. 0/4131 useless extension candidates. Maximal degree in co-relation 5587. Up to 3111 conditions per place. [2024-11-20 17:41:03,811 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 92 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2024-11-20 17:41:03,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 964 flow [2024-11-20 17:41:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-20 17:41:03,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-11-20 17:41:03,813 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 768 flow. Second operand 4 states and 195 transitions. [2024-11-20 17:41:03,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 964 flow [2024-11-20 17:41:03,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 124 transitions, 959 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:03,817 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 775 flow [2024-11-20 17:41:03,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=775, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-11-20 17:41:03,818 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 41 predicate places. [2024-11-20 17:41:03,818 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 775 flow [2024-11-20 17:41:03,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 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) [2024-11-20 17:41:03,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:03,818 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:03,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:41:03,819 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:03,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:03,819 INFO L85 PathProgramCache]: Analyzing trace with hash 608938948, now seen corresponding path program 1 times [2024-11-20 17:41:03,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:03,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740824962] [2024-11-20 17:41:03,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:03,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:04,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:04,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740824962] [2024-11-20 17:41:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740824962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:04,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861969783] [2024-11-20 17:41:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:04,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:04,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:04,250 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) [2024-11-20 17:41:04,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:41:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:04,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:41:04,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:04,372 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 [2024-11-20 17:41:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:04,450 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 19 treesize of output 14 [2024-11-20 17:41:04,469 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:41:04,470 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 [2024-11-20 17:41:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:04,518 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 19 treesize of output 14 [2024-11-20 17:41:04,527 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:04,528 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 [2024-11-20 17:41:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:04,574 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:41:04,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861969783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:04,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:41:04,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-20 17:41:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421634652] [2024-11-20 17:41:04,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:04,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:41:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:41:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:04,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 82 [2024-11-20 17:41:04,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 775 flow. Second operand has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2024-11-20 17:41:04,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:04,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 82 [2024-11-20 17:41:04,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:05,210 INFO L124 PetriNetUnfolderBase]: 1945/4425 cut-off events. [2024-11-20 17:41:05,210 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-11-20 17:41:05,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8002 conditions, 4425 events. 1945/4425 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 35676 event pairs, 1197 based on Foata normal form. 0/3852 useless extension candidates. Maximal degree in co-relation 5410. Up to 3111 conditions per place. [2024-11-20 17:41:05,234 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 89 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-20 17:41:05,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 120 transitions, 971 flow [2024-11-20 17:41:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-20 17:41:05,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-11-20 17:41:05,236 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 775 flow. Second operand 5 states and 214 transitions. [2024-11-20 17:41:05,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 120 transitions, 971 flow [2024-11-20 17:41:05,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 120 transitions, 960 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:05,242 INFO L231 Difference]: Finished difference. Result has 117 places, 120 transitions, 782 flow [2024-11-20 17:41:05,243 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=782, PETRI_PLACES=117, PETRI_TRANSITIONS=120} [2024-11-20 17:41:05,244 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 39 predicate places. [2024-11-20 17:41:05,244 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 120 transitions, 782 flow [2024-11-20 17:41:05,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 states have internal predecessors, (261), 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) [2024-11-20 17:41:05,244 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:05,244 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:05,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:41:05,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:05,445 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:05,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1697239206, now seen corresponding path program 1 times [2024-11-20 17:41:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:05,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892810165] [2024-11-20 17:41:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:05,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:41:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892810165] [2024-11-20 17:41:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892810165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24533085] [2024-11-20 17:41:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:05,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:05,808 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) [2024-11-20 17:41:05,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:41:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:05,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:41:05,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:05,954 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 [2024-11-20 17:41:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:06,009 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 [2024-11-20 17:41:06,017 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:06,018 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 [2024-11-20 17:41:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:06,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:06,153 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 53 treesize of output 49 [2024-11-20 17:41:06,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:41:06,234 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 32 treesize of output 37 [2024-11-20 17:41:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:06,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24533085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:06,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:06,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-20 17:41:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536972304] [2024-11-20 17:41:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:06,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:41:06,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:41:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:41:07,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2024-11-20 17:41:07,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 120 transitions, 782 flow. Second operand has 19 states, 19 states have (on average 44.473684210526315) internal successors, (845), 19 states have internal predecessors, (845), 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) [2024-11-20 17:41:07,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:07,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2024-11-20 17:41:07,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:08,136 INFO L124 PetriNetUnfolderBase]: 2077/4998 cut-off events. [2024-11-20 17:41:08,137 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-20 17:41:08,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8884 conditions, 4998 events. 2077/4998 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 42752 event pairs, 783 based on Foata normal form. 0/4371 useless extension candidates. Maximal degree in co-relation 5725. Up to 1572 conditions per place. [2024-11-20 17:41:08,160 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 110 selfloop transitions, 42 changer transitions 0/169 dead transitions. [2024-11-20 17:41:08,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 1231 flow [2024-11-20 17:41:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:41:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:41:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 637 transitions. [2024-11-20 17:41:08,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-11-20 17:41:08,162 INFO L175 Difference]: Start difference. First operand has 117 places, 120 transitions, 782 flow. Second operand 13 states and 637 transitions. [2024-11-20 17:41:08,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 1231 flow [2024-11-20 17:41:08,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 169 transitions, 1214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:08,169 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 951 flow [2024-11-20 17:41:08,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=951, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-11-20 17:41:08,170 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 53 predicate places. [2024-11-20 17:41:08,170 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 951 flow [2024-11-20 17:41:08,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 44.473684210526315) internal successors, (845), 19 states have internal predecessors, (845), 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) [2024-11-20 17:41:08,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:08,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 17:41:08,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:08,375 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:08,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1697239205, now seen corresponding path program 1 times [2024-11-20 17:41:08,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:08,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232472258] [2024-11-20 17:41:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:08,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:08,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:08,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232472258] [2024-11-20 17:41:08,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232472258] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:08,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:41:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923990456] [2024-11-20 17:41:08,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:08,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:08,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:08,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:41:08,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2024-11-20 17:41:08,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 951 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-11-20 17:41:08,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:08,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2024-11-20 17:41:08,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:08,973 INFO L124 PetriNetUnfolderBase]: 1927/4500 cut-off events. [2024-11-20 17:41:08,973 INFO L125 PetriNetUnfolderBase]: For 735/795 co-relation queries the response was YES. [2024-11-20 17:41:08,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8830 conditions, 4500 events. 1927/4500 cut-off events. For 735/795 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 37117 event pairs, 1173 based on Foata normal form. 297/4344 useless extension candidates. Maximal degree in co-relation 5836. Up to 3024 conditions per place. [2024-11-20 17:41:08,998 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 79 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-11-20 17:41:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 126 transitions, 1165 flow [2024-11-20 17:41:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-11-20 17:41:09,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:41:09,000 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 951 flow. Second operand 5 states and 246 transitions. [2024-11-20 17:41:09,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 126 transitions, 1165 flow [2024-11-20 17:41:09,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 126 transitions, 1077 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-20 17:41:09,007 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 919 flow [2024-11-20 17:41:09,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=919, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2024-11-20 17:41:09,008 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 46 predicate places. [2024-11-20 17:41:09,008 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 919 flow [2024-11-20 17:41:09,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-11-20 17:41:09,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:09,008 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:09,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 17:41:09,009 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:09,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1798167000, now seen corresponding path program 2 times [2024-11-20 17:41:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848396917] [2024-11-20 17:41:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:09,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:09,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848396917] [2024-11-20 17:41:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848396917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946435884] [2024-11-20 17:41:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:41:09,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:09,129 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) [2024-11-20 17:41:09,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:41:09,229 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:41:09,229 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:41:09,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:41:09,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:09,271 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 [2024-11-20 17:41:09,278 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 [2024-11-20 17:41:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:41:09,325 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 [2024-11-20 17:41:09,334 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:41:09,334 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 [2024-11-20 17:41:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 17:41:09,395 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:41:09,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946435884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:09,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:41:09,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2024-11-20 17:41:09,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17456414] [2024-11-20 17:41:09,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:09,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:09,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:09,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:09,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2024-11-20 17:41:09,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 919 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-11-20 17:41:09,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:09,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2024-11-20 17:41:09,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:09,909 INFO L124 PetriNetUnfolderBase]: 1801/4152 cut-off events. [2024-11-20 17:41:09,909 INFO L125 PetriNetUnfolderBase]: For 854/890 co-relation queries the response was YES. [2024-11-20 17:41:09,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8010 conditions, 4152 events. 1801/4152 cut-off events. For 854/890 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 33326 event pairs, 1089 based on Foata normal form. 120/3819 useless extension candidates. Maximal degree in co-relation 5745. Up to 2871 conditions per place. [2024-11-20 17:41:09,929 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 84 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-11-20 17:41:09,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 124 transitions, 1125 flow [2024-11-20 17:41:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2024-11-20 17:41:09,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:41:09,930 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 919 flow. Second operand 5 states and 246 transitions. [2024-11-20 17:41:09,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 124 transitions, 1125 flow [2024-11-20 17:41:09,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 124 transitions, 1066 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:09,937 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 898 flow [2024-11-20 17:41:09,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=898, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-11-20 17:41:09,938 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 43 predicate places. [2024-11-20 17:41:09,938 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 898 flow [2024-11-20 17:41:09,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-11-20 17:41:09,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:09,938 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] [2024-11-20 17:41:09,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 17:41:10,142 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,SelfDestructingSolverStorable21 [2024-11-20 17:41:10,143 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:10,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:10,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1722736717, now seen corresponding path program 1 times [2024-11-20 17:41:10,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:10,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813919909] [2024-11-20 17:41:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:10,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:41:10,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:10,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813919909] [2024-11-20 17:41:10,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813919909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:10,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:10,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:10,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756017899] [2024-11-20 17:41:10,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:10,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:41:10,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:41:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:41:10,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2024-11-20 17:41:10,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 898 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2024-11-20 17:41:10,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:10,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2024-11-20 17:41:10,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:10,657 INFO L124 PetriNetUnfolderBase]: 1801/3984 cut-off events. [2024-11-20 17:41:10,657 INFO L125 PetriNetUnfolderBase]: For 343/367 co-relation queries the response was YES. [2024-11-20 17:41:10,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 3984 events. 1801/3984 cut-off events. For 343/367 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30651 event pairs, 1089 based on Foata normal form. 0/3699 useless extension candidates. Maximal degree in co-relation 5211. Up to 2820 conditions per place. [2024-11-20 17:41:10,680 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 94 selfloop transitions, 15 changer transitions 0/122 dead transitions. [2024-11-20 17:41:10,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 122 transitions, 1112 flow [2024-11-20 17:41:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:41:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:41:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-20 17:41:10,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-11-20 17:41:10,682 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 898 flow. Second operand 4 states and 204 transitions. [2024-11-20 17:41:10,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 122 transitions, 1112 flow [2024-11-20 17:41:10,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 1077 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:10,689 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 889 flow [2024-11-20 17:41:10,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=889, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-11-20 17:41:10,689 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 41 predicate places. [2024-11-20 17:41:10,690 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 889 flow [2024-11-20 17:41:10,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2024-11-20 17:41:10,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:10,690 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] [2024-11-20 17:41:10,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-20 17:41:10,691 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:10,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1722736718, now seen corresponding path program 1 times [2024-11-20 17:41:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:10,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831607705] [2024-11-20 17:41:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:10,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:10,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831607705] [2024-11-20 17:41:10,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831607705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:10,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381084985] [2024-11-20 17:41:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:10,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:10,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:10,922 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) [2024-11-20 17:41:10,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:41:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:11,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:41:11,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:11,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:11,233 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 23 treesize of output 19 [2024-11-20 17:41:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:11,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381084985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:11,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:11,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 17:41:11,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621182207] [2024-11-20 17:41:11,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:11,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:41:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:41:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:41:11,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:41:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 889 flow. Second operand has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 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) [2024-11-20 17:41:11,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:11,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:41:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:12,224 INFO L124 PetriNetUnfolderBase]: 2221/4820 cut-off events. [2024-11-20 17:41:12,224 INFO L125 PetriNetUnfolderBase]: For 374/382 co-relation queries the response was YES. [2024-11-20 17:41:12,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9521 conditions, 4820 events. 2221/4820 cut-off events. For 374/382 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 37997 event pairs, 831 based on Foata normal form. 0/4401 useless extension candidates. Maximal degree in co-relation 6300. Up to 1674 conditions per place. [2024-11-20 17:41:12,251 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 118 selfloop transitions, 42 changer transitions 0/171 dead transitions. [2024-11-20 17:41:12,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 171 transitions, 1345 flow [2024-11-20 17:41:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:41:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:41:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 573 transitions. [2024-11-20 17:41:12,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6352549889135255 [2024-11-20 17:41:12,253 INFO L175 Difference]: Start difference. First operand has 119 places, 122 transitions, 889 flow. Second operand 11 states and 573 transitions. [2024-11-20 17:41:12,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 171 transitions, 1345 flow [2024-11-20 17:41:12,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 171 transitions, 1321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:12,260 INFO L231 Difference]: Finished difference. Result has 131 places, 127 transitions, 1017 flow [2024-11-20 17:41:12,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1017, PETRI_PLACES=131, PETRI_TRANSITIONS=127} [2024-11-20 17:41:12,261 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 53 predicate places. [2024-11-20 17:41:12,261 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 127 transitions, 1017 flow [2024-11-20 17:41:12,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 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) [2024-11-20 17:41:12,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:12,262 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:12,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:41:12,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 17:41:12,463 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:12,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1831922601, now seen corresponding path program 1 times [2024-11-20 17:41:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022813596] [2024-11-20 17:41:12,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:12,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:12,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:12,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022813596] [2024-11-20 17:41:12,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022813596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:12,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050162271] [2024-11-20 17:41:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:12,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:12,786 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) [2024-11-20 17:41:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:41:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:12,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:41:12,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:13,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:41:13,159 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 23 treesize of output 19 [2024-11-20 17:41:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050162271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:41:13,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:41:13,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2024-11-20 17:41:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820972747] [2024-11-20 17:41:13,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:41:13,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:41:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:41:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:41:14,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:41:14,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 127 transitions, 1017 flow. Second operand has 28 states, 28 states have (on average 46.17857142857143) internal successors, (1293), 28 states have internal predecessors, (1293), 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) [2024-11-20 17:41:14,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:14,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:41:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:15,050 INFO L124 PetriNetUnfolderBase]: 2121/4537 cut-off events. [2024-11-20 17:41:15,051 INFO L125 PetriNetUnfolderBase]: For 1105/1105 co-relation queries the response was YES. [2024-11-20 17:41:15,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9677 conditions, 4537 events. 2121/4537 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 35090 event pairs, 1053 based on Foata normal form. 63/4338 useless extension candidates. Maximal degree in co-relation 6477. Up to 1113 conditions per place. [2024-11-20 17:41:15,074 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 137 selfloop transitions, 62 changer transitions 0/210 dead transitions. [2024-11-20 17:41:15,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 210 transitions, 1694 flow [2024-11-20 17:41:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:41:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:41:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 916 transitions. [2024-11-20 17:41:15,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-11-20 17:41:15,077 INFO L175 Difference]: Start difference. First operand has 131 places, 127 transitions, 1017 flow. Second operand 18 states and 916 transitions. [2024-11-20 17:41:15,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 210 transitions, 1694 flow [2024-11-20 17:41:15,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 210 transitions, 1652 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:15,086 INFO L231 Difference]: Finished difference. Result has 147 places, 137 transitions, 1235 flow [2024-11-20 17:41:15,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1235, PETRI_PLACES=147, PETRI_TRANSITIONS=137} [2024-11-20 17:41:15,087 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 69 predicate places. [2024-11-20 17:41:15,087 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 137 transitions, 1235 flow [2024-11-20 17:41:15,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 46.17857142857143) internal successors, (1293), 28 states have internal predecessors, (1293), 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) [2024-11-20 17:41:15,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:15,088 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:15,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 17:41:15,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:15,292 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:15,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1257695394, now seen corresponding path program 2 times [2024-11-20 17:41:15,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:15,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104885043] [2024-11-20 17:41:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:15,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:41:15,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:15,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104885043] [2024-11-20 17:41:15,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104885043] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:41:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779510152] [2024-11-20 17:41:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:41:15,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:41:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:41:15,435 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) [2024-11-20 17:41:15,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:41:15,537 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:41:15,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:41:15,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:41:15,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:41:15,586 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 [2024-11-20 17:41:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:41:15,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:41:15,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779510152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:15,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:41:15,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 11 [2024-11-20 17:41:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102356694] [2024-11-20 17:41:15,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:15,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:41:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:41:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:41:15,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-11-20 17:41:15,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 137 transitions, 1235 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-20 17:41:15,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:15,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-11-20 17:41:15,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:16,220 INFO L124 PetriNetUnfolderBase]: 1983/4260 cut-off events. [2024-11-20 17:41:16,220 INFO L125 PetriNetUnfolderBase]: For 1487/1487 co-relation queries the response was YES. [2024-11-20 17:41:16,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9222 conditions, 4260 events. 1983/4260 cut-off events. For 1487/1487 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 32754 event pairs, 1251 based on Foata normal form. 61/4050 useless extension candidates. Maximal degree in co-relation 6718. Up to 3148 conditions per place. [2024-11-20 17:41:16,244 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 102 selfloop transitions, 22 changer transitions 0/135 dead transitions. [2024-11-20 17:41:16,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 135 transitions, 1467 flow [2024-11-20 17:41:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:41:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:41:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 256 transitions. [2024-11-20 17:41:16,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-11-20 17:41:16,245 INFO L175 Difference]: Start difference. First operand has 147 places, 137 transitions, 1235 flow. Second operand 5 states and 256 transitions. [2024-11-20 17:41:16,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 135 transitions, 1467 flow [2024-11-20 17:41:16,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 135 transitions, 1384 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-11-20 17:41:16,254 INFO L231 Difference]: Finished difference. Result has 137 places, 135 transitions, 1180 flow [2024-11-20 17:41:16,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1180, PETRI_PLACES=137, PETRI_TRANSITIONS=135} [2024-11-20 17:41:16,255 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 59 predicate places. [2024-11-20 17:41:16,255 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 135 transitions, 1180 flow [2024-11-20 17:41:16,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-11-20 17:41:16,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:16,255 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, 1, 1, 1, 1] [2024-11-20 17:41:16,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 17:41:16,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:41:16,456 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:16,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2049972477, now seen corresponding path program 1 times [2024-11-20 17:41:16,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:16,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098446616] [2024-11-20 17:41:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:16,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:16,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:16,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098446616] [2024-11-20 17:41:16,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098446616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:16,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:16,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:16,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690141377] [2024-11-20 17:41:16,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:16,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:41:16,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:41:16,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:41:16,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2024-11-20 17:41:16,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 135 transitions, 1180 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:16,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:16,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2024-11-20 17:41:16,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:16,973 INFO L124 PetriNetUnfolderBase]: 2971/5772 cut-off events. [2024-11-20 17:41:16,973 INFO L125 PetriNetUnfolderBase]: For 938/938 co-relation queries the response was YES. [2024-11-20 17:41:16,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12660 conditions, 5772 events. 2971/5772 cut-off events. For 938/938 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 42744 event pairs, 1470 based on Foata normal form. 0/5313 useless extension candidates. Maximal degree in co-relation 8404. Up to 3472 conditions per place. [2024-11-20 17:41:17,003 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 138 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2024-11-20 17:41:17,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 149 transitions, 1506 flow [2024-11-20 17:41:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:41:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:41:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2024-11-20 17:41:17,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7276422764227642 [2024-11-20 17:41:17,004 INFO L175 Difference]: Start difference. First operand has 137 places, 135 transitions, 1180 flow. Second operand 3 states and 179 transitions. [2024-11-20 17:41:17,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 149 transitions, 1506 flow [2024-11-20 17:41:17,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 149 transitions, 1468 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:17,012 INFO L231 Difference]: Finished difference. Result has 138 places, 137 transitions, 1164 flow [2024-11-20 17:41:17,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1164, PETRI_PLACES=138, PETRI_TRANSITIONS=137} [2024-11-20 17:41:17,013 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 60 predicate places. [2024-11-20 17:41:17,013 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 137 transitions, 1164 flow [2024-11-20 17:41:17,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:41:17,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:17,013 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, 1, 1, 1, 1, 1] [2024-11-20 17:41:17,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-20 17:41:17,013 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:17,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1411249289, now seen corresponding path program 1 times [2024-11-20 17:41:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:17,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819103851] [2024-11-20 17:41:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:17,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:17,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819103851] [2024-11-20 17:41:17,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819103851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:17,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:17,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:41:17,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174212100] [2024-11-20 17:41:17,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:17,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:41:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:41:17,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:41:17,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2024-11-20 17:41:17,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 137 transitions, 1164 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2024-11-20 17:41:17,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:17,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2024-11-20 17:41:17,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:17,779 INFO L124 PetriNetUnfolderBase]: 3182/5996 cut-off events. [2024-11-20 17:41:17,780 INFO L125 PetriNetUnfolderBase]: For 1838/1970 co-relation queries the response was YES. [2024-11-20 17:41:17,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14603 conditions, 5996 events. 3182/5996 cut-off events. For 1838/1970 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 43696 event pairs, 1698 based on Foata normal form. 132/5717 useless extension candidates. Maximal degree in co-relation 10925. Up to 3871 conditions per place. [2024-11-20 17:41:17,834 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 138 selfloop transitions, 3 changer transitions 0/150 dead transitions. [2024-11-20 17:41:17,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 150 transitions, 1488 flow [2024-11-20 17:41:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:41:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:41:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2024-11-20 17:41:17,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2024-11-20 17:41:17,835 INFO L175 Difference]: Start difference. First operand has 138 places, 137 transitions, 1164 flow. Second operand 3 states and 178 transitions. [2024-11-20 17:41:17,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 150 transitions, 1488 flow [2024-11-20 17:41:17,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 150 transitions, 1480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:17,861 INFO L231 Difference]: Finished difference. Result has 140 places, 139 transitions, 1180 flow [2024-11-20 17:41:17,861 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1180, PETRI_PLACES=140, PETRI_TRANSITIONS=139} [2024-11-20 17:41:17,862 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 62 predicate places. [2024-11-20 17:41:17,862 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 139 transitions, 1180 flow [2024-11-20 17:41:17,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2024-11-20 17:41:17,862 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:17,862 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:17,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-20 17:41:17,862 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:17,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1482770463, now seen corresponding path program 1 times [2024-11-20 17:41:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:17,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407318379] [2024-11-20 17:41:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407318379] [2024-11-20 17:41:18,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407318379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:18,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:18,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143192969] [2024-11-20 17:41:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:18,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:18,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:18,753 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:18,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 139 transitions, 1180 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:18,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:18,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:18,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:20,612 INFO L124 PetriNetUnfolderBase]: 7203/14637 cut-off events. [2024-11-20 17:41:20,612 INFO L125 PetriNetUnfolderBase]: For 5643/6150 co-relation queries the response was YES. [2024-11-20 17:41:20,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 14637 events. 7203/14637 cut-off events. For 5643/6150 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 137979 event pairs, 351 based on Foata normal form. 516/14980 useless extension candidates. Maximal degree in co-relation 27017. Up to 3405 conditions per place. [2024-11-20 17:41:20,698 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 220 selfloop transitions, 6 changer transitions 7/246 dead transitions. [2024-11-20 17:41:20,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 246 transitions, 2076 flow [2024-11-20 17:41:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 572 transitions. [2024-11-20 17:41:20,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2024-11-20 17:41:20,701 INFO L175 Difference]: Start difference. First operand has 140 places, 139 transitions, 1180 flow. Second operand 10 states and 572 transitions. [2024-11-20 17:41:20,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 246 transitions, 2076 flow [2024-11-20 17:41:20,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 246 transitions, 2058 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:41:20,892 INFO L231 Difference]: Finished difference. Result has 155 places, 144 transitions, 1227 flow [2024-11-20 17:41:20,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1227, PETRI_PLACES=155, PETRI_TRANSITIONS=144} [2024-11-20 17:41:20,892 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 77 predicate places. [2024-11-20 17:41:20,892 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 144 transitions, 1227 flow [2024-11-20 17:41:20,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:20,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:20,893 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:20,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-20 17:41:20,893 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:20,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1671074951, now seen corresponding path program 2 times [2024-11-20 17:41:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024164765] [2024-11-20 17:41:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:20,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:21,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024164765] [2024-11-20 17:41:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024164765] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:21,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:21,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:21,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176391261] [2024-11-20 17:41:21,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:21,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:21,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:22,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:22,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 144 transitions, 1227 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:22,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:22,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:22,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:24,346 INFO L124 PetriNetUnfolderBase]: 7478/15834 cut-off events. [2024-11-20 17:41:24,346 INFO L125 PetriNetUnfolderBase]: For 10879/11438 co-relation queries the response was YES. [2024-11-20 17:41:24,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43076 conditions, 15834 events. 7478/15834 cut-off events. For 10879/11438 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 156433 event pairs, 981 based on Foata normal form. 568/16203 useless extension candidates. Maximal degree in co-relation 42649. Up to 7841 conditions per place. [2024-11-20 17:41:24,534 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 188 selfloop transitions, 8 changer transitions 6/215 dead transitions. [2024-11-20 17:41:24,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 215 transitions, 1942 flow [2024-11-20 17:41:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 550 transitions. [2024-11-20 17:41:24,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-11-20 17:41:24,537 INFO L175 Difference]: Start difference. First operand has 155 places, 144 transitions, 1227 flow. Second operand 10 states and 550 transitions. [2024-11-20 17:41:24,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 215 transitions, 1942 flow [2024-11-20 17:41:24,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 215 transitions, 1923 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-20 17:41:24,745 INFO L231 Difference]: Finished difference. Result has 164 places, 146 transitions, 1259 flow [2024-11-20 17:41:24,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1259, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2024-11-20 17:41:24,746 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 86 predicate places. [2024-11-20 17:41:24,746 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 1259 flow [2024-11-20 17:41:24,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:24,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:24,746 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:24,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-20 17:41:24,746 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:24,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1329705323, now seen corresponding path program 3 times [2024-11-20 17:41:24,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:24,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521676343] [2024-11-20 17:41:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:25,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521676343] [2024-11-20 17:41:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521676343] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:25,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:25,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:25,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529238262] [2024-11-20 17:41:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:25,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:25,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:25,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:25,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 1259 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:25,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:25,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:25,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:28,620 INFO L124 PetriNetUnfolderBase]: 8095/17674 cut-off events. [2024-11-20 17:41:28,621 INFO L125 PetriNetUnfolderBase]: For 20245/20959 co-relation queries the response was YES. [2024-11-20 17:41:28,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50757 conditions, 17674 events. 8095/17674 cut-off events. For 20245/20959 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 182221 event pairs, 1581 based on Foata normal form. 723/18059 useless extension candidates. Maximal degree in co-relation 50003. Up to 8820 conditions per place. [2024-11-20 17:41:28,755 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 187 selfloop transitions, 11 changer transitions 7/218 dead transitions. [2024-11-20 17:41:28,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 218 transitions, 1992 flow [2024-11-20 17:41:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 557 transitions. [2024-11-20 17:41:28,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6792682926829269 [2024-11-20 17:41:28,757 INFO L175 Difference]: Start difference. First operand has 164 places, 146 transitions, 1259 flow. Second operand 10 states and 557 transitions. [2024-11-20 17:41:28,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 218 transitions, 1992 flow [2024-11-20 17:41:28,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 218 transitions, 1936 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:28,998 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 1290 flow [2024-11-20 17:41:28,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1290, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-11-20 17:41:28,998 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 93 predicate places. [2024-11-20 17:41:28,999 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 1290 flow [2024-11-20 17:41:28,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:28,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:28,999 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:28,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-20 17:41:28,999 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:28,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1496440587, now seen corresponding path program 4 times [2024-11-20 17:41:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:29,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967153770] [2024-11-20 17:41:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:29,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967153770] [2024-11-20 17:41:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967153770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:29,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:29,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069077351] [2024-11-20 17:41:29,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:29,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:30,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:30,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 1290 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:30,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:30,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:30,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:32,834 INFO L124 PetriNetUnfolderBase]: 8486/19209 cut-off events. [2024-11-20 17:41:32,834 INFO L125 PetriNetUnfolderBase]: For 26004/26608 co-relation queries the response was YES. [2024-11-20 17:41:32,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56144 conditions, 19209 events. 8486/19209 cut-off events. For 26004/26608 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 205599 event pairs, 1110 based on Foata normal form. 613/19603 useless extension candidates. Maximal degree in co-relation 55279. Up to 10985 conditions per place. [2024-11-20 17:41:32,985 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 193 selfloop transitions, 11 changer transitions 6/223 dead transitions. [2024-11-20 17:41:32,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 223 transitions, 2108 flow [2024-11-20 17:41:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2024-11-20 17:41:32,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2024-11-20 17:41:32,987 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 1290 flow. Second operand 10 states and 556 transitions. [2024-11-20 17:41:32,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 223 transitions, 2108 flow [2024-11-20 17:41:33,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 223 transitions, 2043 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-20 17:41:33,285 INFO L231 Difference]: Finished difference. Result has 178 places, 151 transitions, 1325 flow [2024-11-20 17:41:33,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1325, PETRI_PLACES=178, PETRI_TRANSITIONS=151} [2024-11-20 17:41:33,286 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 100 predicate places. [2024-11-20 17:41:33,286 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 151 transitions, 1325 flow [2024-11-20 17:41:33,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:33,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:33,286 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:33,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-20 17:41:33,286 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:33,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:33,287 INFO L85 PathProgramCache]: Analyzing trace with hash -857695163, now seen corresponding path program 5 times [2024-11-20 17:41:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379510076] [2024-11-20 17:41:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:33,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:33,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379510076] [2024-11-20 17:41:33,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379510076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:33,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:33,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356549756] [2024-11-20 17:41:33,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:33,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:34,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:34,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 151 transitions, 1325 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:34,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:34,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:34,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:37,294 INFO L124 PetriNetUnfolderBase]: 8911/20182 cut-off events. [2024-11-20 17:41:37,294 INFO L125 PetriNetUnfolderBase]: For 37516/38203 co-relation queries the response was YES. [2024-11-20 17:41:37,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61794 conditions, 20182 events. 8911/20182 cut-off events. For 37516/38203 co-relation queries the response was YES. Maximal size of possible extension queue 1338. Compared 217880 event pairs, 1752 based on Foata normal form. 696/20552 useless extension candidates. Maximal degree in co-relation 60818. Up to 12330 conditions per place. [2024-11-20 17:41:37,488 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 193 selfloop transitions, 14 changer transitions 7/227 dead transitions. [2024-11-20 17:41:37,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 227 transitions, 2150 flow [2024-11-20 17:41:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2024-11-20 17:41:37,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2024-11-20 17:41:37,489 INFO L175 Difference]: Start difference. First operand has 178 places, 151 transitions, 1325 flow. Second operand 10 states and 559 transitions. [2024-11-20 17:41:37,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 227 transitions, 2150 flow [2024-11-20 17:41:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 227 transitions, 2075 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-20 17:41:37,976 INFO L231 Difference]: Finished difference. Result has 184 places, 154 transitions, 1365 flow [2024-11-20 17:41:37,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1365, PETRI_PLACES=184, PETRI_TRANSITIONS=154} [2024-11-20 17:41:37,977 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 106 predicate places. [2024-11-20 17:41:37,977 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 154 transitions, 1365 flow [2024-11-20 17:41:37,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:37,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:37,978 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:37,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-20 17:41:37,978 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:37,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash -155166607, now seen corresponding path program 6 times [2024-11-20 17:41:37,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:37,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300996911] [2024-11-20 17:41:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:37,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:38,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:38,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300996911] [2024-11-20 17:41:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300996911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:38,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:38,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306423413] [2024-11-20 17:41:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:38,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:38,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:38,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 154 transitions, 1365 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:38,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:38,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:38,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:42,468 INFO L124 PetriNetUnfolderBase]: 10578/23943 cut-off events. [2024-11-20 17:41:42,469 INFO L125 PetriNetUnfolderBase]: For 58277/59124 co-relation queries the response was YES. [2024-11-20 17:41:42,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75268 conditions, 23943 events. 10578/23943 cut-off events. For 58277/59124 co-relation queries the response was YES. Maximal size of possible extension queue 1599. Compared 266124 event pairs, 1955 based on Foata normal form. 856/24433 useless extension candidates. Maximal degree in co-relation 74109. Up to 13124 conditions per place. [2024-11-20 17:41:42,659 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 206 selfloop transitions, 14 changer transitions 6/239 dead transitions. [2024-11-20 17:41:42,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2308 flow [2024-11-20 17:41:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2024-11-20 17:41:42,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6841463414634147 [2024-11-20 17:41:42,661 INFO L175 Difference]: Start difference. First operand has 184 places, 154 transitions, 1365 flow. Second operand 10 states and 561 transitions. [2024-11-20 17:41:42,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2308 flow [2024-11-20 17:41:43,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 239 transitions, 2222 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-20 17:41:43,213 INFO L231 Difference]: Finished difference. Result has 192 places, 158 transitions, 1422 flow [2024-11-20 17:41:43,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1422, PETRI_PLACES=192, PETRI_TRANSITIONS=158} [2024-11-20 17:41:43,214 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 114 predicate places. [2024-11-20 17:41:43,214 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 158 transitions, 1422 flow [2024-11-20 17:41:43,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:43,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:43,215 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:43,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-20 17:41:43,215 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:43,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1210070853, now seen corresponding path program 7 times [2024-11-20 17:41:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:43,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876006074] [2024-11-20 17:41:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:43,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876006074] [2024-11-20 17:41:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876006074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:43,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:43,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:43,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506769950] [2024-11-20 17:41:43,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:43,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:43,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:43,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:44,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:44,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 158 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:44,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:44,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:41:48,011 INFO L124 PetriNetUnfolderBase]: 10626/24037 cut-off events. [2024-11-20 17:41:48,011 INFO L125 PetriNetUnfolderBase]: For 66474/67350 co-relation queries the response was YES. [2024-11-20 17:41:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77205 conditions, 24037 events. 10626/24037 cut-off events. For 66474/67350 co-relation queries the response was YES. Maximal size of possible extension queue 1639. Compared 266799 event pairs, 2010 based on Foata normal form. 885/24537 useless extension candidates. Maximal degree in co-relation 76005. Up to 13431 conditions per place. [2024-11-20 17:41:48,225 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 210 selfloop transitions, 15 changer transitions 7/245 dead transitions. [2024-11-20 17:41:48,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 245 transitions, 2385 flow [2024-11-20 17:41:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:41:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:41:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 563 transitions. [2024-11-20 17:41:48,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6865853658536586 [2024-11-20 17:41:48,226 INFO L175 Difference]: Start difference. First operand has 192 places, 158 transitions, 1422 flow. Second operand 10 states and 563 transitions. [2024-11-20 17:41:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 245 transitions, 2385 flow [2024-11-20 17:41:48,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 245 transitions, 2336 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-20 17:41:48,863 INFO L231 Difference]: Finished difference. Result has 202 places, 162 transitions, 1497 flow [2024-11-20 17:41:48,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1497, PETRI_PLACES=202, PETRI_TRANSITIONS=162} [2024-11-20 17:41:48,863 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 124 predicate places. [2024-11-20 17:41:48,863 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 162 transitions, 1497 flow [2024-11-20 17:41:48,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:48,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:41:48,864 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, 1, 1, 1, 1, 1, 1] [2024-11-20 17:41:48,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-20 17:41:48,864 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-11-20 17:41:48,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:41:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash -846334799, now seen corresponding path program 8 times [2024-11-20 17:41:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:41:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712847718] [2024-11-20 17:41:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:41:48,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:41:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:41:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:41:49,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:41:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712847718] [2024-11-20 17:41:49,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712847718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:41:49,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:41:49,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 17:41:49,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276022888] [2024-11-20 17:41:49,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:41:49,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:41:49,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:41:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:41:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:41:49,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-11-20 17:41:49,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 162 transitions, 1497 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 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) [2024-11-20 17:41:49,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:41:49,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-11-20 17:41:49,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand