./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-trans.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 c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:47:09,671 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:47:09,756 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:47:09,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:47:09,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:47:09,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:47:09,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:47:09,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:47:09,795 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:47:09,795 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:47:09,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:47:09,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:47:09,796 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:47:09,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:47:09,799 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:47:09,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:47:09,800 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:47:09,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:47:09,800 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:47:09,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:47:09,801 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:47:09,801 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:47:09,802 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:47:09,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:47:09,802 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:47:09,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:47:09,803 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:47:09,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:47:09,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:47:09,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:47:09,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:47:09,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:47:09,805 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:47:09,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:47:09,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:47:09,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:47:09,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:47:09,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:47:09,807 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:47:09,807 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:47:09,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:47:09,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:47:09,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-11-09 10:47:10,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:47:10,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:47:10,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:47:10,112 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:47:10,112 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:47:10,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-09 10:47:11,655 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:47:11,886 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:47:11,888 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-09 10:47:11,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8af9548/4fc5bf4697614016b44c8c5b8e1979de/FLAG7d58d4a49 [2024-11-09 10:47:11,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e8af9548/4fc5bf4697614016b44c8c5b8e1979de [2024-11-09 10:47:11,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:47:11,919 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:47:11,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:47:11,921 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:47:11,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:47:11,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@318a8d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:11, skipping insertion in model container [2024-11-09 10:47:11,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:47:11" (1/1) ... [2024-11-09 10:47:11,954 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:47:12,197 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:47:12,209 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:47:12,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:47:12,232 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:47:12,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:47:12,309 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:47:12,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12 WrapperNode [2024-11-09 10:47:12,310 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:47:12,311 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:47:12,311 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:47:12,311 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:47:12,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,375 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-11-09 10:47:12,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:47:12,376 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:47:12,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:47:12,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:47:12,393 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,405 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,439 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 15, 9]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-09 10:47:12,440 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,467 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,473 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,488 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:47:12,489 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:47:12,489 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:47:12,489 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:47:12,490 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (1/1) ... [2024-11-09 10:47:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:47:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:12,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:47:12,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:47:12,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:47:12,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:47:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:47:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:47:12,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:47:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:47:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:47:12,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:47:12,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:47:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:47:12,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:47:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:47:12,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:47:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:47:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:47:12,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:47:12,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:47:12,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:47:12,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:47:12,597 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:47:12,773 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:47:12,775 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:47:13,661 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:47:13,662 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:47:14,229 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:47:14,230 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:47:14,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:47:14 BoogieIcfgContainer [2024-11-09 10:47:14,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:47:14,237 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:47:14,237 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:47:14,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:47:14,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:47:11" (1/3) ... [2024-11-09 10:47:14,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aec09bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:47:14, skipping insertion in model container [2024-11-09 10:47:14,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:47:12" (2/3) ... [2024-11-09 10:47:14,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aec09bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:47:14, skipping insertion in model container [2024-11-09 10:47:14,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:47:14" (3/3) ... [2024-11-09 10:47:14,266 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-11-09 10:47:14,294 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:47:14,294 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-09 10:47:14,295 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:47:14,390 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:47:14,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-11-09 10:47:14,487 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-11-09 10:47:14,487 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:47:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-09 10:47:14,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-11-09 10:47:14,501 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-11-09 10:47:14,515 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:47:14,524 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;@4516b0b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:47:14,525 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-09 10:47:14,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:47:14,530 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:47:14,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:47:14,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:14,532 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:47:14,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:14,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-11-09 10:47:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93842336] [2024-11-09 10:47:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:14,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93842336] [2024-11-09 10:47:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93842336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:47:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017580480] [2024-11-09 10:47:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:14,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:47:14,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:47:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:47:15,023 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:15,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:15,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:15,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:15,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:15,750 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-11-09 10:47:15,750 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-09 10:47:15,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-11-09 10:47:15,808 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-09 10:47:15,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-11-09 10:47:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-09 10:47:15,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-09 10:47:15,828 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-11-09 10:47:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-11-09 10:47:15,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:47:15,844 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-11-09 10:47:15,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-11-09 10:47:15,852 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-11-09 10:47:15,854 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-11-09 10:47:15,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:15,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:15,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:47:15,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:47:15,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:15,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-11-09 10:47:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:15,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330361980] [2024-11-09 10:47:15,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:16,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:16,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330361980] [2024-11-09 10:47:16,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330361980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:16,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:47:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495470625] [2024-11-09 10:47:16,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:16,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:16,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:16,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:16,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:16,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:16,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:16,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:16,896 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-11-09 10:47:16,897 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:47:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-11-09 10:47:16,944 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-09 10:47:16,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-11-09 10:47:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-09 10:47:16,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-09 10:47:16,950 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-11-09 10:47:16,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-11-09 10:47:16,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:16,954 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-11-09 10:47:16,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-11-09 10:47:16,955 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-09 10:47:16,955 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-11-09 10:47:16,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:16,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:16,956 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:47:16,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:47:16,957 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:16,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-11-09 10:47:16,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:16,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738875017] [2024-11-09 10:47:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:16,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:17,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738875017] [2024-11-09 10:47:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738875017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:17,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918886429] [2024-11-09 10:47:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:17,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:17,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:17,305 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:17,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:47:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:17,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:47:17,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:17,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:47:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:17,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:47:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918886429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:17,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:17,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:47:17,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372742710] [2024-11-09 10:47:17,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:17,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:47:17,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:17,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:47:17,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:47:18,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:18,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:18,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:18,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:18,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:19,302 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-11-09 10:47:19,302 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:47:19,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-11-09 10:47:19,343 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-09 10:47:19,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-11-09 10:47:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:47:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:47:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-11-09 10:47:19,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-09 10:47:19,347 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-11-09 10:47:19,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-11-09 10:47:19,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:47:19,350 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-11-09 10:47:19,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-09 10:47:19,351 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-11-09 10:47:19,351 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-11-09 10:47:19,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:19,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:19,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:47:19,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:47:19,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:19,553 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:19,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-11-09 10:47:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513938029] [2024-11-09 10:47:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:19,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:19,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513938029] [2024-11-09 10:47:19,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513938029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:19,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108253913] [2024-11-09 10:47:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:19,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:19,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:19,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:19,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:19,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:19,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:20,479 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-11-09 10:47:20,479 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 10:47:20,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-11-09 10:47:20,509 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-09 10:47:20,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-11-09 10:47:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-11-09 10:47:20,511 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-09 10:47:20,511 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-11-09 10:47:20,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-11-09 10:47:20,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:20,514 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-11-09 10:47:20,514 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-11-09 10:47:20,515 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-11-09 10:47:20,515 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-11-09 10:47:20,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:20,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:20,516 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:20,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:47:20,516 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:20,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:20,517 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-11-09 10:47:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:20,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888829962] [2024-11-09 10:47:20,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:20,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:20,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888829962] [2024-11-09 10:47:20,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888829962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:20,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:20,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:20,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784098816] [2024-11-09 10:47:20,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:20,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:20,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:20,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:21,162 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-11-09 10:47:21,165 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 10:47:21,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-11-09 10:47:21,196 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-09 10:47:21,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-11-09 10:47:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:21,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-11-09 10:47:21,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-09 10:47:21,200 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-11-09 10:47:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-11-09 10:47:21,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:21,207 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-11-09 10:47:21,207 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-11-09 10:47:21,208 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-09 10:47:21,208 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-11-09 10:47:21,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:21,208 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:21,208 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:21,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:47:21,209 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:21,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-11-09 10:47:21,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:21,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140717047] [2024-11-09 10:47:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:21,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140717047] [2024-11-09 10:47:21,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140717047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:21,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060895146] [2024-11-09 10:47:21,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:21,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:21,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:21,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:47:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:21,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:47:21,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:21,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:47:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:21,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:47:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060895146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:21,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:21,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:47:21,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172868664] [2024-11-09 10:47:21,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:21,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:47:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:47:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:47:22,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:22,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:22,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:22,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:22,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:23,504 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-09 10:47:23,504 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-09 10:47:23,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-11-09 10:47:23,530 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-11-09 10:47:23,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-11-09 10:47:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-09 10:47:23,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:47:23,533 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-11-09 10:47:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-11-09 10:47:23,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:23,536 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-11-09 10:47:23,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-09 10:47:23,537 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-09 10:47:23,537 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-11-09 10:47:23,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:23,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:23,538 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:23,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:47:23,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:47:23,740 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:23,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-11-09 10:47:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:23,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46596023] [2024-11-09 10:47:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:23,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46596023] [2024-11-09 10:47:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46596023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:23,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:23,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23052551] [2024-11-09 10:47:23,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:23,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:23,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:23,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:24,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:24,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:24,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:24,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:24,658 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-11-09 10:47:24,659 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-09 10:47:24,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-11-09 10:47:24,691 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-09 10:47:24,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-11-09 10:47:24,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:24,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:24,693 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:24,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-11-09 10:47:24,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:24,697 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-11-09 10:47:24,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-11-09 10:47:24,698 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-09 10:47:24,698 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-11-09 10:47:24,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:24,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:24,698 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:24,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:47:24,699 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:24,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:24,699 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-11-09 10:47:24,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021099801] [2024-11-09 10:47:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:24,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:24,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021099801] [2024-11-09 10:47:24,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021099801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:24,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948137398] [2024-11-09 10:47:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:24,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:24,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:24,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:24,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:47:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:25,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:47:25,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:25,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:25,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:25,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948137398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:25,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:25,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:47:25,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396433557] [2024-11-09 10:47:25,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:25,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:47:25,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:47:25,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:47:26,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:26,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:26,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:26,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:26,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:26,888 INFO L124 PetriNetUnfolderBase]: 2207/4842 cut-off events. [2024-11-09 10:47:26,888 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-09 10:47:26,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7894 conditions, 4842 events. 2207/4842 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39100 event pairs, 1390 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 7849. Up to 2949 conditions per place. [2024-11-09 10:47:26,930 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-11-09 10:47:26,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 120 transitions, 442 flow [2024-11-09 10:47:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:47:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:47:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 510 transitions. [2024-11-09 10:47:26,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-09 10:47:26,933 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 7 states and 510 transitions. [2024-11-09 10:47:26,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 120 transitions, 442 flow [2024-11-09 10:47:26,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 120 transitions, 437 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:26,936 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 343 flow [2024-11-09 10:47:26,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=343, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-11-09 10:47:26,939 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-09 10:47:26,939 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 343 flow [2024-11-09 10:47:26,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:26,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:26,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:26,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:27,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:27,146 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:27,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-11-09 10:47:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:27,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910084506] [2024-11-09 10:47:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:27,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:27,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910084506] [2024-11-09 10:47:27,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910084506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:27,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799736718] [2024-11-09 10:47:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:27,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:27,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:27,434 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:27,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:47:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:27,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:47:27,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:27,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:27,620 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:47:27,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799736718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:27,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:47:27,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 10:47:27,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742400882] [2024-11-09 10:47:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:27,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:27,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:27,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:27,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:47:27,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:27,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:27,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:27,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:28,104 INFO L124 PetriNetUnfolderBase]: 2208/4846 cut-off events. [2024-11-09 10:47:28,104 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-09 10:47:28,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7917 conditions, 4846 events. 2208/4846 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39145 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7865. Up to 2966 conditions per place. [2024-11-09 10:47:28,140 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2024-11-09 10:47:28,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 485 flow [2024-11-09 10:47:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:28,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:28,142 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 343 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:28,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 123 transitions, 485 flow [2024-11-09 10:47:28,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 123 transitions, 465 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:47:28,145 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 344 flow [2024-11-09 10:47:28,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-11-09 10:47:28,146 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-09 10:47:28,146 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 344 flow [2024-11-09 10:47:28,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:28,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:28,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:28,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:47:28,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:28,350 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:28,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:28,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-11-09 10:47:28,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:28,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051712912] [2024-11-09 10:47:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:28,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:28,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051712912] [2024-11-09 10:47:28,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051712912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:28,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:28,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:47:28,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753239210] [2024-11-09 10:47:28,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:28,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:47:28,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:28,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:47:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:47:28,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:28,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:28,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:28,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:28,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:28,824 INFO L124 PetriNetUnfolderBase]: 2208/4842 cut-off events. [2024-11-09 10:47:28,824 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-09 10:47:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7909 conditions, 4842 events. 2208/4842 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39120 event pairs, 1390 based on Foata normal form. 2/3734 useless extension candidates. Maximal degree in co-relation 7860. Up to 2954 conditions per place. [2024-11-09 10:47:28,855 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 62 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2024-11-09 10:47:28,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 466 flow [2024-11-09 10:47:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:47:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:47:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-11-09 10:47:28,857 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-09 10:47:28,857 INFO L175 Difference]: Start difference. First operand has 119 places, 122 transitions, 344 flow. Second operand 3 states and 248 transitions. [2024-11-09 10:47:28,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 466 flow [2024-11-09 10:47:28,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 461 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:28,858 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 337 flow [2024-11-09 10:47:28,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-11-09 10:47:28,859 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-09 10:47:28,859 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 337 flow [2024-11-09 10:47:28,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:28,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:28,860 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:28,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:47:28,860 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:28,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-11-09 10:47:28,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:28,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144448388] [2024-11-09 10:47:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:28,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:28,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:28,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144448388] [2024-11-09 10:47:28,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144448388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:28,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:28,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:28,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778732900] [2024-11-09 10:47:28,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:28,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:28,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:28,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:28,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:28,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 337 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:28,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:28,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:28,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:29,402 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-09 10:47:29,402 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-09 10:47:29,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 4841 events. 2207/4841 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39089 event pairs, 1390 based on Foata normal form. 1/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2962 conditions per place. [2024-11-09 10:47:29,427 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 61 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-09 10:47:29,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 463 flow [2024-11-09 10:47:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-09 10:47:29,428 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-09 10:47:29,428 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 337 flow. Second operand 4 states and 325 transitions. [2024-11-09 10:47:29,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 463 flow [2024-11-09 10:47:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 459 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:29,430 INFO L231 Difference]: Finished difference. Result has 117 places, 118 transitions, 335 flow [2024-11-09 10:47:29,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=335, PETRI_PLACES=117, PETRI_TRANSITIONS=118} [2024-11-09 10:47:29,431 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 3 predicate places. [2024-11-09 10:47:29,431 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 118 transitions, 335 flow [2024-11-09 10:47:29,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:29,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:29,432 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:29,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:47:29,432 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:29,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-11-09 10:47:29,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:29,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442779376] [2024-11-09 10:47:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442779376] [2024-11-09 10:47:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442779376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:29,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292338769] [2024-11-09 10:47:29,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:29,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:29,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:47:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:29,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:29,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:29,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292338769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:29,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:29,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:47:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526694346] [2024-11-09 10:47:29,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:29,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:29,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:29,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:29,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:30,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:30,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 118 transitions, 335 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:30,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:30,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:30,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:30,958 INFO L124 PetriNetUnfolderBase]: 4400/9622 cut-off events. [2024-11-09 10:47:30,959 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-09 10:47:30,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15695 conditions, 9622 events. 4400/9622 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 87426 event pairs, 2784 based on Foata normal form. 1/7501 useless extension candidates. Maximal degree in co-relation 7850. Up to 2943 conditions per place. [2024-11-09 10:47:31,012 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 87 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-11-09 10:47:31,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 171 transitions, 716 flow [2024-11-09 10:47:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-11-09 10:47:31,016 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-11-09 10:47:31,016 INFO L175 Difference]: Start difference. First operand has 117 places, 118 transitions, 335 flow. Second operand 9 states and 716 transitions. [2024-11-09 10:47:31,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 171 transitions, 716 flow [2024-11-09 10:47:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 706 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:31,020 INFO L231 Difference]: Finished difference. Result has 126 places, 133 transitions, 496 flow [2024-11-09 10:47:31,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=496, PETRI_PLACES=126, PETRI_TRANSITIONS=133} [2024-11-09 10:47:31,021 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 12 predicate places. [2024-11-09 10:47:31,022 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 133 transitions, 496 flow [2024-11-09 10:47:31,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:31,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:31,023 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:31,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:31,223 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,SelfDestructingSolverStorable11 [2024-11-09 10:47:31,224 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:31,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-11-09 10:47:31,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:31,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599668115] [2024-11-09 10:47:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:31,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:31,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599668115] [2024-11-09 10:47:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599668115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:31,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376430018] [2024-11-09 10:47:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:31,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:31,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:31,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:31,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:47:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:31,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:47:31,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:31,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:47:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:31,760 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:47:31,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376430018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:31,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:47:31,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 10:47:31,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049293242] [2024-11-09 10:47:31,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:31,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:31,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:47:31,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:31,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 133 transitions, 496 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:31,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:31,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:31,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:32,562 INFO L124 PetriNetUnfolderBase]: 4412/9676 cut-off events. [2024-11-09 10:47:32,562 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-11-09 10:47:32,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15825 conditions, 9676 events. 4412/9676 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 88219 event pairs, 2780 based on Foata normal form. 0/7455 useless extension candidates. Maximal degree in co-relation 7886. Up to 5924 conditions per place. [2024-11-09 10:47:32,625 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 79 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-09 10:47:32,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 136 transitions, 670 flow [2024-11-09 10:47:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-09 10:47:32,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-09 10:47:32,627 INFO L175 Difference]: Start difference. First operand has 126 places, 133 transitions, 496 flow. Second operand 4 states and 317 transitions. [2024-11-09 10:47:32,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 136 transitions, 670 flow [2024-11-09 10:47:32,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 136 transitions, 666 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:47:32,631 INFO L231 Difference]: Finished difference. Result has 129 places, 135 transitions, 516 flow [2024-11-09 10:47:32,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=516, PETRI_PLACES=129, PETRI_TRANSITIONS=135} [2024-11-09 10:47:32,633 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 15 predicate places. [2024-11-09 10:47:32,633 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 135 transitions, 516 flow [2024-11-09 10:47:32,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:32,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:32,634 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:32,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:32,834 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 [2024-11-09 10:47:32,835 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:32,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1364202777, now seen corresponding path program 2 times [2024-11-09 10:47:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:32,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581835309] [2024-11-09 10:47:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:47:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581835309] [2024-11-09 10:47:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581835309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56126880] [2024-11-09 10:47:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:33,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:33,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:33,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:33,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:47:33,250 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:33,251 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:33,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:47:33,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:33,282 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 [2024-11-09 10:47:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:47:33,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:47:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56126880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:33,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-09 10:47:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883828936] [2024-11-09 10:47:33,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:33,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:47:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:33,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:47:33,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:47:34,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:34,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 135 transitions, 516 flow. Second operand has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:34,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:34,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:34,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:36,029 INFO L124 PetriNetUnfolderBase]: 6608/14465 cut-off events. [2024-11-09 10:47:36,030 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-09 10:47:36,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23690 conditions, 14465 events. 6608/14465 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 140043 event pairs, 4174 based on Foata normal form. 1/11239 useless extension candidates. Maximal degree in co-relation 7891. Up to 5915 conditions per place. [2024-11-09 10:47:36,123 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 115 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-11-09 10:47:36,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1061 flow [2024-11-09 10:47:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:47:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:47:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1221 transitions. [2024-11-09 10:47:36,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985294117647059 [2024-11-09 10:47:36,127 INFO L175 Difference]: Start difference. First operand has 129 places, 135 transitions, 516 flow. Second operand 17 states and 1221 transitions. [2024-11-09 10:47:36,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1061 flow [2024-11-09 10:47:36,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 198 transitions, 1052 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:36,132 INFO L231 Difference]: Finished difference. Result has 145 places, 154 transitions, 751 flow [2024-11-09 10:47:36,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=751, PETRI_PLACES=145, PETRI_TRANSITIONS=154} [2024-11-09 10:47:36,133 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 31 predicate places. [2024-11-09 10:47:36,133 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 154 transitions, 751 flow [2024-11-09 10:47:36,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:36,134 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:36,134 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:36,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:47:36,338 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 [2024-11-09 10:47:36,339 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:36,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash 261377450, now seen corresponding path program 1 times [2024-11-09 10:47:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:36,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094477158] [2024-11-09 10:47:36,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:36,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:36,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094477158] [2024-11-09 10:47:36,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094477158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:36,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:36,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:36,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338653598] [2024-11-09 10:47:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:36,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:47:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:47:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:47:36,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:36,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 154 transitions, 751 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:36,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:36,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:37,912 INFO L124 PetriNetUnfolderBase]: 6615/14510 cut-off events. [2024-11-09 10:47:37,912 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-09 10:47:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23791 conditions, 14510 events. 6615/14510 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 139988 event pairs, 4170 based on Foata normal form. 3/11196 useless extension candidates. Maximal degree in co-relation 7969. Up to 8876 conditions per place. [2024-11-09 10:47:38,044 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 95 selfloop transitions, 5 changer transitions 0/154 dead transitions. [2024-11-09 10:47:38,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 154 transitions, 949 flow [2024-11-09 10:47:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-09 10:47:38,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-09 10:47:38,046 INFO L175 Difference]: Start difference. First operand has 145 places, 154 transitions, 751 flow. Second operand 4 states and 325 transitions. [2024-11-09 10:47:38,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 154 transitions, 949 flow [2024-11-09 10:47:38,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 154 transitions, 911 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-11-09 10:47:38,052 INFO L231 Difference]: Finished difference. Result has 143 places, 153 transitions, 719 flow [2024-11-09 10:47:38,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=719, PETRI_PLACES=143, PETRI_TRANSITIONS=153} [2024-11-09 10:47:38,053 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 29 predicate places. [2024-11-09 10:47:38,053 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 153 transitions, 719 flow [2024-11-09 10:47:38,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:38,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:38,053 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:38,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:47:38,054 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:38,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash -487233991, now seen corresponding path program 1 times [2024-11-09 10:47:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:38,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985722367] [2024-11-09 10:47:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:38,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985722367] [2024-11-09 10:47:38,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985722367] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616880566] [2024-11-09 10:47:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:38,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:38,206 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:38,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:47:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:38,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:38,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:38,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:38,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616880566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:38,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:38,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:47:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184965458] [2024-11-09 10:47:38,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:38,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:38,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:38,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:38,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:38,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:38,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 153 transitions, 719 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:38,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:38,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:38,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:40,860 INFO L124 PetriNetUnfolderBase]: 13187/28831 cut-off events. [2024-11-09 10:47:40,860 INFO L125 PetriNetUnfolderBase]: For 226/226 co-relation queries the response was YES. [2024-11-09 10:47:40,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 28831 events. 13187/28831 cut-off events. For 226/226 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 307377 event pairs, 8352 based on Foata normal form. 3/22489 useless extension candidates. Maximal degree in co-relation 15974. Up to 8825 conditions per place. [2024-11-09 10:47:41,079 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 114 selfloop transitions, 50 changer transitions 0/218 dead transitions. [2024-11-09 10:47:41,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 218 transitions, 1342 flow [2024-11-09 10:47:41,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:47:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:47:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2024-11-09 10:47:41,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2024-11-09 10:47:41,081 INFO L175 Difference]: Start difference. First operand has 143 places, 153 transitions, 719 flow. Second operand 9 states and 713 transitions. [2024-11-09 10:47:41,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 218 transitions, 1342 flow [2024-11-09 10:47:41,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 218 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:47:41,088 INFO L231 Difference]: Finished difference. Result has 152 places, 170 transitions, 1016 flow [2024-11-09 10:47:41,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=152, PETRI_TRANSITIONS=170} [2024-11-09 10:47:41,088 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 38 predicate places. [2024-11-09 10:47:41,089 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 170 transitions, 1016 flow [2024-11-09 10:47:41,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:41,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:41,090 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:41,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:47:41,290 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,SelfDestructingSolverStorable15 [2024-11-09 10:47:41,290 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:41,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:41,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2075616908, now seen corresponding path program 1 times [2024-11-09 10:47:41,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:41,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135464222] [2024-11-09 10:47:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:41,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:47:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135464222] [2024-11-09 10:47:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135464222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:47:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:47:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:47:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533811131] [2024-11-09 10:47:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:47:41,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:47:41,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:47:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:47:41,625 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:41,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 170 transitions, 1016 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:41,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:41,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:41,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:44,321 INFO L124 PetriNetUnfolderBase]: 13217/28987 cut-off events. [2024-11-09 10:47:44,321 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-11-09 10:47:44,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47443 conditions, 28987 events. 13217/28987 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 310020 event pairs, 8340 based on Foata normal form. 0/22347 useless extension candidates. Maximal degree in co-relation 16122. Up to 17731 conditions per place. [2024-11-09 10:47:44,564 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 116 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-09 10:47:44,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 172 transitions, 1260 flow [2024-11-09 10:47:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:47:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:47:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-09 10:47:44,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-09 10:47:44,566 INFO L175 Difference]: Start difference. First operand has 152 places, 170 transitions, 1016 flow. Second operand 4 states and 316 transitions. [2024-11-09 10:47:44,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 172 transitions, 1260 flow [2024-11-09 10:47:44,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 1258 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-09 10:47:44,572 INFO L231 Difference]: Finished difference. Result has 156 places, 171 transitions, 1033 flow [2024-11-09 10:47:44,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1033, PETRI_PLACES=156, PETRI_TRANSITIONS=171} [2024-11-09 10:47:44,573 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 42 predicate places. [2024-11-09 10:47:44,574 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 171 transitions, 1033 flow [2024-11-09 10:47:44,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:44,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:44,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:44,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:47:44,575 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:44,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash 560678040, now seen corresponding path program 2 times [2024-11-09 10:47:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:44,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357896251] [2024-11-09 10:47:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:47:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357896251] [2024-11-09 10:47:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357896251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300666149] [2024-11-09 10:47:45,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:47:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:45,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:45,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:45,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:47:45,163 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:47:45,163 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:47:45,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:47:45,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:45,210 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 [2024-11-09 10:47:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:47:45,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 10:47:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300666149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:45,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-09 10:47:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139438771] [2024-11-09 10:47:45,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:45,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:47:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:47:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:47:46,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:47:46,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 171 transitions, 1033 flow. Second operand has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:46,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:46,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:47:46,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:47:50,871 INFO L124 PetriNetUnfolderBase]: 19795/43329 cut-off events. [2024-11-09 10:47:50,871 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2024-11-09 10:47:51,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70966 conditions, 43329 events. 19795/43329 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 2041. Compared 486477 event pairs, 12522 based on Foata normal form. 3/33674 useless extension candidates. Maximal degree in co-relation 24078. Up to 17704 conditions per place. [2024-11-09 10:47:51,297 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 142 selfloop transitions, 55 changer transitions 0/249 dead transitions. [2024-11-09 10:47:51,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 249 transitions, 1877 flow [2024-11-09 10:47:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 10:47:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 10:47:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1216 transitions. [2024-11-09 10:47:51,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596078431372549 [2024-11-09 10:47:51,300 INFO L175 Difference]: Start difference. First operand has 156 places, 171 transitions, 1033 flow. Second operand 17 states and 1216 transitions. [2024-11-09 10:47:51,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 249 transitions, 1877 flow [2024-11-09 10:47:51,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 249 transitions, 1870 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:47:51,310 INFO L231 Difference]: Finished difference. Result has 172 places, 200 transitions, 1497 flow [2024-11-09 10:47:51,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1497, PETRI_PLACES=172, PETRI_TRANSITIONS=200} [2024-11-09 10:47:51,311 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 58 predicate places. [2024-11-09 10:47:51,312 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 200 transitions, 1497 flow [2024-11-09 10:47:51,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:51,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:47:51,312 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:47:51,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:47:51,513 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,SelfDestructingSolverStorable17 [2024-11-09 10:47:51,514 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:47:51,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:47:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1803065764, now seen corresponding path program 1 times [2024-11-09 10:47:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:47:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714546997] [2024-11-09 10:47:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:47:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:51,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:47:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714546997] [2024-11-09 10:47:51,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714546997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:47:51,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808927703] [2024-11-09 10:47:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:47:51,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:47:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:47:51,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:47:51,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:47:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:47:51,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:47:51,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:47:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:51,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:47:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:47:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808927703] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:47:51,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:47:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:47:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808965540] [2024-11-09 10:47:51,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:47:51,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:47:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:47:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:47:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:47:52,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-09 10:47:52,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 200 transitions, 1497 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:47:52,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:47:52,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-09 10:47:52,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:48:00,961 INFO L124 PetriNetUnfolderBase]: 39538/86424 cut-off events. [2024-11-09 10:48:00,961 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2024-11-09 10:48:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141427 conditions, 86424 events. 39538/86424 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 3962. Compared 1060647 event pairs, 25056 based on Foata normal form. 9/67425 useless extension candidates. Maximal degree in co-relation 47785. Up to 26472 conditions per place. [2024-11-09 10:48:01,812 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 156 selfloop transitions, 81 changer transitions 0/290 dead transitions. [2024-11-09 10:48:01,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 290 transitions, 2624 flow [2024-11-09 10:48:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:48:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:48:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2024-11-09 10:48:01,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6677083333333333 [2024-11-09 10:48:01,814 INFO L175 Difference]: Start difference. First operand has 172 places, 200 transitions, 1497 flow. Second operand 8 states and 641 transitions. [2024-11-09 10:48:01,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 290 transitions, 2624 flow [2024-11-09 10:48:01,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 290 transitions, 2490 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-11-09 10:48:01,827 INFO L231 Difference]: Finished difference. Result has 177 places, 229 transitions, 2065 flow [2024-11-09 10:48:01,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2065, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2024-11-09 10:48:01,828 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 63 predicate places. [2024-11-09 10:48:01,828 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 2065 flow [2024-11-09 10:48:01,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:01,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:48:01,829 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:48:01,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:48:02,029 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 [2024-11-09 10:48:02,030 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-09 10:48:02,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:48:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1162836769, now seen corresponding path program 2 times [2024-11-09 10:48:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:48:02,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417416858] [2024-11-09 10:48:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:48:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:48:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:48:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:48:02,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:48:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417416858] [2024-11-09 10:48:02,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417416858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:48:02,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191236503] [2024-11-09 10:48:02,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:48:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:48:02,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:02,373 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:48:02,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:48:02,517 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:48:02,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:48:02,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 10:48:02,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:48:02,575 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 [2024-11-09 10:48:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:48:02,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:48:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:48:02,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191236503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:48:02,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:48:02,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-09 10:48:02,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988854195] [2024-11-09 10:48:02,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:48:02,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:48:02,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:48:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:48:02,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:48:03,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-09 10:48:03,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 2065 flow. Second operand has 18 states, 18 states have (on average 68.44444444444444) internal successors, (1232), 18 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:48:03,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:48:03,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-09 10:48:03,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand