./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-cond-4.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 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:53:40,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:53:40,893 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:53:40,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:53:40,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:53:40,925 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:53:40,926 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:53:40,927 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:53:40,927 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:53:40,928 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:53:40,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:53:40,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:53:40,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:53:40,929 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:53:40,930 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:53:40,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:53:40,931 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:53:40,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:53:40,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:53:40,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:53:40,932 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:53:40,935 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:53:40,936 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:53:40,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:40,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:53:40,937 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:53:40,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:53:40,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-11-22 21:53:41,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:53:41,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:53:41,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:53:41,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:53:41,139 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:53:41,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-22 21:53:42,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:53:42,676 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:53:42,677 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-22 21:53:42,685 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3815e2c/df3eeb3a76764fa9b5ae232e721049b8/FLAG71673d874 [2024-11-22 21:53:42,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a3815e2c/df3eeb3a76764fa9b5ae232e721049b8 [2024-11-22 21:53:42,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:53:42,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:53:42,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:42,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:53:42,711 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:53:42,712 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:42" (1/1) ... [2024-11-22 21:53:42,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c548549 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:42, skipping insertion in model container [2024-11-22 21:53:42,715 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:42" (1/1) ... [2024-11-22 21:53:42,734 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:53:42,957 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:53:42,963 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:42,974 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:53:43,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:43,019 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:53:43,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43 WrapperNode [2024-11-22 21:53:43,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:43,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:43,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:53:43,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:53:43,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,065 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 178 [2024-11-22 21:53:43,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:43,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:53:43,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:53:43,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:53:43,075 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,077 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,095 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:53:43,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,100 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,103 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,104 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:53:43,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:53:43,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:53:43,108 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:53:43,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (1/1) ... [2024-11-22 21:53:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:43,138 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) [2024-11-22 21:53:43,145 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 [2024-11-22 21:53:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:53:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:53:43,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:53:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:53:43,215 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:53:43,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:53:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:53:43,222 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:53:43,394 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:53:43,396 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:53:43,824 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:53:43,825 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:53:44,083 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:53:44,083 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:53:44,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:44 BoogieIcfgContainer [2024-11-22 21:53:44,083 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:53:44,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:53:44,086 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:53:44,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:53:44,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:53:42" (1/3) ... [2024-11-22 21:53:44,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1407c2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:44, skipping insertion in model container [2024-11-22 21:53:44,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:43" (2/3) ... [2024-11-22 21:53:44,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1407c2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:44, skipping insertion in model container [2024-11-22 21:53:44,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:44" (3/3) ... [2024-11-22 21:53:44,092 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-11-22 21:53:44,105 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:53:44,105 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-22 21:53:44,106 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:53:44,166 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:53:44,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 126 flow [2024-11-22 21:53:44,224 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-22 21:53:44,225 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:53:44,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 6/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 149 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-22 21:53:44,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 126 flow [2024-11-22 21:53:44,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 53 transitions, 118 flow [2024-11-22 21:53:44,241 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:53:44,249 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;@8a9cf5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:53:44,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-22 21:53:44,255 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:53:44,256 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:53:44,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:53:44,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:44,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:44,257 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:44,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash 597900, now seen corresponding path program 1 times [2024-11-22 21:53:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:44,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326368405] [2024-11-22 21:53:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:44,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:44,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326368405] [2024-11-22 21:53:44,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326368405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:44,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:53:44,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583990088] [2024-11-22 21:53:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:44,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:44,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:44,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:44,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-22 21:53:44,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:44,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:44,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:44,704 INFO L124 PetriNetUnfolderBase]: 182/445 cut-off events. [2024-11-22 21:53:44,705 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-22 21:53:44,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 445 events. 182/445 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2484 event pairs, 119 based on Foata normal form. 1/349 useless extension candidates. Maximal degree in co-relation 670. Up to 293 conditions per place. [2024-11-22 21:53:44,711 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 27 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-11-22 21:53:44,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 170 flow [2024-11-22 21:53:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-22 21:53:44,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-22 21:53:44,722 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 118 flow. Second operand 3 states and 103 transitions. [2024-11-22 21:53:44,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 170 flow [2024-11-22 21:53:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:44,727 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 108 flow [2024-11-22 21:53:44,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-11-22 21:53:44,733 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-22 21:53:44,734 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 108 flow [2024-11-22 21:53:44,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-22 21:53:44,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:44,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:44,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:53:44,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:44,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:44,736 INFO L85 PathProgramCache]: Analyzing trace with hash 597901, now seen corresponding path program 1 times [2024-11-22 21:53:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:44,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758709201] [2024-11-22 21:53:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:44,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:45,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758709201] [2024-11-22 21:53:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758709201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:45,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:45,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:45,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673408106] [2024-11-22 21:53:45,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:45,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:45,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-22 21:53:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:45,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:45,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:45,260 INFO L124 PetriNetUnfolderBase]: 183/448 cut-off events. [2024-11-22 21:53:45,261 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-22 21:53:45,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 448 events. 183/448 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2495 event pairs, 119 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 736. Up to 298 conditions per place. [2024-11-22 21:53:45,265 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 30 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-22 21:53:45,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 182 flow [2024-11-22 21:53:45,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:45,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-22 21:53:45,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-22 21:53:45,269 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 108 flow. Second operand 3 states and 106 transitions. [2024-11-22 21:53:45,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 182 flow [2024-11-22 21:53:45,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:45,271 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 123 flow [2024-11-22 21:53:45,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-11-22 21:53:45,273 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-22 21:53:45,273 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 123 flow [2024-11-22 21:53:45,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-22 21:53:45,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:45,274 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:53:45,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:53:45,274 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:45,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash 574602240, now seen corresponding path program 1 times [2024-11-22 21:53:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:45,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517589914] [2024-11-22 21:53:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:45,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517589914] [2024-11-22 21:53:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517589914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844142273] [2024-11-22 21:53:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:45,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:45,491 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) [2024-11-22 21:53:45,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:53:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:45,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:45,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:45,581 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 [2024-11-22 21:53:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:45,678 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:45,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844142273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:45,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:45,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259114522] [2024-11-22 21:53:45,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:45,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:45,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:45,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:45,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 123 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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) [2024-11-22 21:53:45,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:45,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:45,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:46,147 INFO L124 PetriNetUnfolderBase]: 183/447 cut-off events. [2024-11-22 21:53:46,147 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-22 21:53:46,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 447 events. 183/447 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2489 event pairs, 119 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 736. Up to 294 conditions per place. [2024-11-22 21:53:46,152 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 26 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-22 21:53:46,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 185 flow [2024-11-22 21:53:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:46,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-22 21:53:46,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-11-22 21:53:46,155 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 123 flow. Second operand 5 states and 153 transitions. [2024-11-22 21:53:46,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 185 flow [2024-11-22 21:53:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:46,157 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 136 flow [2024-11-22 21:53:46,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-22 21:53:46,158 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-22 21:53:46,158 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 136 flow [2024-11-22 21:53:46,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 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) [2024-11-22 21:53:46,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:46,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:53:46,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:46,359 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 [2024-11-22 21:53:46,360 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:46,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:46,361 INFO L85 PathProgramCache]: Analyzing trace with hash 635151810, now seen corresponding path program 1 times [2024-11-22 21:53:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436531130] [2024-11-22 21:53:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436531130] [2024-11-22 21:53:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436531130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:46,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:46,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138069853] [2024-11-22 21:53:46,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:46,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:46,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:46,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-22 21:53:46,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-11-22 21:53:46,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:46,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-22 21:53:46,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:46,482 INFO L124 PetriNetUnfolderBase]: 182/446 cut-off events. [2024-11-22 21:53:46,482 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-22 21:53:46,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 765 conditions, 446 events. 182/446 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2473 event pairs, 119 based on Foata normal form. 1/351 useless extension candidates. Maximal degree in co-relation 736. Up to 296 conditions per place. [2024-11-22 21:53:46,484 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-22 21:53:46,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 192 flow [2024-11-22 21:53:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-22 21:53:46,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-11-22 21:53:46,486 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 136 flow. Second operand 3 states and 107 transitions. [2024-11-22 21:53:46,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 192 flow [2024-11-22 21:53:46,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 182 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:46,487 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 124 flow [2024-11-22 21:53:46,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-22 21:53:46,488 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-11-22 21:53:46,488 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 124 flow [2024-11-22 21:53:46,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-11-22 21:53:46,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:46,488 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:46,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:53:46,489 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:46,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357714, now seen corresponding path program 1 times [2024-11-22 21:53:46,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:46,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065608112] [2024-11-22 21:53:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:46,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:46,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065608112] [2024-11-22 21:53:46,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065608112] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:46,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:46,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:53:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214423730] [2024-11-22 21:53:46,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:46,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:46,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:46,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:46,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-22 21:53:46,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-11-22 21:53:46,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:46,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-22 21:53:46,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:46,638 INFO L124 PetriNetUnfolderBase]: 182/385 cut-off events. [2024-11-22 21:53:46,638 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-22 21:53:46,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 385 events. 182/385 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1759 event pairs, 119 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 685. Up to 292 conditions per place. [2024-11-22 21:53:46,640 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-22 21:53:46,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 170 flow [2024-11-22 21:53:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-22 21:53:46,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-11-22 21:53:46,644 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 124 flow. Second operand 4 states and 101 transitions. [2024-11-22 21:53:46,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 170 flow [2024-11-22 21:53:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:46,645 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2024-11-22 21:53:46,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-22 21:53:46,646 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2024-11-22 21:53:46,646 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2024-11-22 21:53:46,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2024-11-22 21:53:46,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:46,646 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:46,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:53:46,646 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:46,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357713, now seen corresponding path program 1 times [2024-11-22 21:53:46,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:46,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129241461] [2024-11-22 21:53:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:46,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129241461] [2024-11-22 21:53:46,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129241461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:46,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156948085] [2024-11-22 21:53:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:46,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:46,821 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) [2024-11-22 21:53:46,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:53:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:46,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:46,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:46,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:46,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156948085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:47,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:47,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:47,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375335294] [2024-11-22 21:53:47,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:47,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:47,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:47,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:47,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:47,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:47,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 108 flow. Second operand has 11 states, 11 states have (on average 26.181818181818183) internal successors, (288), 11 states have internal predecessors, (288), 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) [2024-11-22 21:53:47,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:47,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:47,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:47,407 INFO L124 PetriNetUnfolderBase]: 417/754 cut-off events. [2024-11-22 21:53:47,407 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-22 21:53:47,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1426 conditions, 754 events. 417/754 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3676 event pairs, 140 based on Foata normal form. 0/639 useless extension candidates. Maximal degree in co-relation 1401. Up to 378 conditions per place. [2024-11-22 21:53:47,410 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 51 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-22 21:53:47,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 267 flow [2024-11-22 21:53:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-11-22 21:53:47,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-22 21:53:47,411 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 5 states and 176 transitions. [2024-11-22 21:53:47,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 267 flow [2024-11-22 21:53:47,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:47,413 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 121 flow [2024-11-22 21:53:47,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-11-22 21:53:47,413 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-11-22 21:53:47,413 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 121 flow [2024-11-22 21:53:47,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.181818181818183) internal successors, (288), 11 states have internal predecessors, (288), 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) [2024-11-22 21:53:47,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:47,414 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:47,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:53:47,615 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 [2024-11-22 21:53:47,615 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:47,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -496334376, now seen corresponding path program 1 times [2024-11-22 21:53:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901358489] [2024-11-22 21:53:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901358489] [2024-11-22 21:53:47,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901358489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645167264] [2024-11-22 21:53:47,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:47,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:47,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:47,713 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) [2024-11-22 21:53:47,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:53:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:47,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:47,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:47,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:47,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:47,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645167264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:47,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:47,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:47,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700878020] [2024-11-22 21:53:47,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:47,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:47,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:48,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-22 21:53:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 121 flow. Second operand has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-11-22 21:53:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-22 21:53:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:48,325 INFO L124 PetriNetUnfolderBase]: 756/1283 cut-off events. [2024-11-22 21:53:48,325 INFO L125 PetriNetUnfolderBase]: For 161/209 co-relation queries the response was YES. [2024-11-22 21:53:48,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 1283 events. 756/1283 cut-off events. For 161/209 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6048 event pairs, 165 based on Foata normal form. 0/1019 useless extension candidates. Maximal degree in co-relation 2642. Up to 849 conditions per place. [2024-11-22 21:53:48,332 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 51 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-22 21:53:48,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 282 flow [2024-11-22 21:53:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-11-22 21:53:48,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-22 21:53:48,333 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 121 flow. Second operand 5 states and 150 transitions. [2024-11-22 21:53:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 282 flow [2024-11-22 21:53:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:48,336 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 158 flow [2024-11-22 21:53:48,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2024-11-22 21:53:48,336 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-22 21:53:48,337 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 158 flow [2024-11-22 21:53:48,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 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) [2024-11-22 21:53:48,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:48,338 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:48,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:53:48,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:48,542 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:48,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -447627277, now seen corresponding path program 1 times [2024-11-22 21:53:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294104293] [2024-11-22 21:53:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:48,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:48,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294104293] [2024-11-22 21:53:48,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294104293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:48,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711245931] [2024-11-22 21:53:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:48,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:48,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:48,682 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) [2024-11-22 21:53:48,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:53:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:48,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:48,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:48,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:48,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:53:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:49,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711245931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:49,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456959752] [2024-11-22 21:53:49,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:49,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:49,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:49,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:49,428 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:49,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 158 flow. Second operand has 17 states, 17 states have (on average 25.764705882352942) internal successors, (438), 17 states have internal predecessors, (438), 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) [2024-11-22 21:53:49,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:49,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:49,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:49,827 INFO L124 PetriNetUnfolderBase]: 1262/2336 cut-off events. [2024-11-22 21:53:49,827 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-22 21:53:49,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5074 conditions, 2336 events. 1262/2336 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14150 event pairs, 626 based on Foata normal form. 0/2033 useless extension candidates. Maximal degree in co-relation 2689. Up to 1023 conditions per place. [2024-11-22 21:53:49,837 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 103 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-11-22 21:53:49,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 128 transitions, 634 flow [2024-11-22 21:53:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:49,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 296 transitions. [2024-11-22 21:53:49,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-22 21:53:49,838 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 158 flow. Second operand 8 states and 296 transitions. [2024-11-22 21:53:49,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 128 transitions, 634 flow [2024-11-22 21:53:49,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 128 transitions, 612 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:49,840 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 270 flow [2024-11-22 21:53:49,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-11-22 21:53:49,841 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-22 21:53:49,841 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 270 flow [2024-11-22 21:53:49,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 25.764705882352942) internal successors, (438), 17 states have internal predecessors, (438), 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) [2024-11-22 21:53:49,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:49,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:49,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:50,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:50,046 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:50,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1793504182, now seen corresponding path program 1 times [2024-11-22 21:53:50,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:50,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065387902] [2024-11-22 21:53:50,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:50,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:50,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065387902] [2024-11-22 21:53:50,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065387902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:50,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645445670] [2024-11-22 21:53:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:50,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:50,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:50,146 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) [2024-11-22 21:53:50,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:53:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:50,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:50,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:50,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:50,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-22 21:53:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:50,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645445670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:50,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:50,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-22 21:53:50,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776746261] [2024-11-22 21:53:50,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:50,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:53:50,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:50,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:53:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:53:50,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-22 21:53:50,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 270 flow. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2024-11-22 21:53:50,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:50,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-22 21:53:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:50,934 INFO L124 PetriNetUnfolderBase]: 1573/2649 cut-off events. [2024-11-22 21:53:50,934 INFO L125 PetriNetUnfolderBase]: For 1645/1741 co-relation queries the response was YES. [2024-11-22 21:53:50,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6668 conditions, 2649 events. 1573/2649 cut-off events. For 1645/1741 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14409 event pairs, 734 based on Foata normal form. 0/2346 useless extension candidates. Maximal degree in co-relation 4111. Up to 2029 conditions per place. [2024-11-22 21:53:50,948 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 82 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-11-22 21:53:50,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 593 flow [2024-11-22 21:53:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-11-22 21:53:50,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-11-22 21:53:50,949 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 270 flow. Second operand 7 states and 216 transitions. [2024-11-22 21:53:50,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 593 flow [2024-11-22 21:53:50,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:50,954 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 338 flow [2024-11-22 21:53:50,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-11-22 21:53:50,954 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-22 21:53:50,955 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 338 flow [2024-11-22 21:53:50,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 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) [2024-11-22 21:53:50,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:50,955 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:50,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:53:51,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:51,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:51,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -606417888, now seen corresponding path program 2 times [2024-11-22 21:53:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:51,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679666556] [2024-11-22 21:53:51,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:51,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:51,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679666556] [2024-11-22 21:53:51,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679666556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063886437] [2024-11-22 21:53:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:51,288 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) [2024-11-22 21:53:51,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:53:51,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:51,335 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:51,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:53:51,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:51,349 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 [2024-11-22 21:53:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:51,477 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:51,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063886437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:51,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:51,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:51,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305335417] [2024-11-22 21:53:51,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:51,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:51,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:51,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:51,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-22 21:53:51,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 338 flow. Second operand has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 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) [2024-11-22 21:53:51,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:51,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-22 21:53:51,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:52,192 INFO L124 PetriNetUnfolderBase]: 1234/2242 cut-off events. [2024-11-22 21:53:52,192 INFO L125 PetriNetUnfolderBase]: For 1270/1270 co-relation queries the response was YES. [2024-11-22 21:53:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5748 conditions, 2242 events. 1234/2242 cut-off events. For 1270/1270 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13365 event pairs, 637 based on Foata normal form. 0/2170 useless extension candidates. Maximal degree in co-relation 3672. Up to 1437 conditions per place. [2024-11-22 21:53:52,202 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 70 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-22 21:53:52,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 640 flow [2024-11-22 21:53:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-22 21:53:52,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-22 21:53:52,203 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 338 flow. Second operand 5 states and 167 transitions. [2024-11-22 21:53:52,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 640 flow [2024-11-22 21:53:52,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 605 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:52,208 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 328 flow [2024-11-22 21:53:52,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-11-22 21:53:52,209 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-11-22 21:53:52,209 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 328 flow [2024-11-22 21:53:52,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 26.727272727272727) internal successors, (294), 11 states have internal predecessors, (294), 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) [2024-11-22 21:53:52,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:52,210 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:52,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:53:52,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:52,411 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:52,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:52,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1165962537, now seen corresponding path program 2 times [2024-11-22 21:53:52,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:52,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555007108] [2024-11-22 21:53:52,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:52,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:52,425 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:52,426 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:52,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555007108] [2024-11-22 21:53:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555007108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:53:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711143563] [2024-11-22 21:53:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:52,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:52,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:52,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-22 21:53:52,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-22 21:53:52,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:52,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-22 21:53:52,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:52,898 INFO L124 PetriNetUnfolderBase]: 1441/2409 cut-off events. [2024-11-22 21:53:52,899 INFO L125 PetriNetUnfolderBase]: For 2875/2875 co-relation queries the response was YES. [2024-11-22 21:53:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6680 conditions, 2409 events. 1441/2409 cut-off events. For 2875/2875 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12740 event pairs, 890 based on Foata normal form. 64/2254 useless extension candidates. Maximal degree in co-relation 4107. Up to 1872 conditions per place. [2024-11-22 21:53:52,909 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 57 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-11-22 21:53:52,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 505 flow [2024-11-22 21:53:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:52,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:52,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-22 21:53:52,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-22 21:53:52,911 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 328 flow. Second operand 5 states and 132 transitions. [2024-11-22 21:53:52,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 505 flow [2024-11-22 21:53:52,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:52,915 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 312 flow [2024-11-22 21:53:52,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-22 21:53:52,916 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-11-22 21:53:52,916 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 312 flow [2024-11-22 21:53:52,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-22 21:53:52,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:52,916 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:52,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:53:52,917 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:52,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1274638176, now seen corresponding path program 1 times [2024-11-22 21:53:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:52,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213602798] [2024-11-22 21:53:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:53,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:53,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213602798] [2024-11-22 21:53:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213602798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:53,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67331421] [2024-11-22 21:53:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:53,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:53,081 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) [2024-11-22 21:53:53,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:53:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:53,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:53,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:53,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:53,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-22 21:53:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:53,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67331421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:53,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626931969] [2024-11-22 21:53:53,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:53,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:53,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-22 21:53:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 312 flow. Second operand has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:53,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:53,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-22 21:53:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:54,276 INFO L124 PetriNetUnfolderBase]: 1350/2260 cut-off events. [2024-11-22 21:53:54,277 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-11-22 21:53:54,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5911 conditions, 2260 events. 1350/2260 cut-off events. For 1762/1762 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11763 event pairs, 658 based on Foata normal form. 16/2149 useless extension candidates. Maximal degree in co-relation 3889. Up to 1064 conditions per place. [2024-11-22 21:53:54,287 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 89 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-11-22 21:53:54,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 116 transitions, 701 flow [2024-11-22 21:53:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-11-22 21:53:54,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5491071428571429 [2024-11-22 21:53:54,288 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 312 flow. Second operand 8 states and 246 transitions. [2024-11-22 21:53:54,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 116 transitions, 701 flow [2024-11-22 21:53:54,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 116 transitions, 679 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:54,292 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 419 flow [2024-11-22 21:53:54,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=419, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-22 21:53:54,293 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-22 21:53:54,293 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 419 flow [2024-11-22 21:53:54,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.294117647058822) internal successors, (345), 17 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:54,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:54,294 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:54,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:53:54,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:54,498 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:54,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:54,498 INFO L85 PathProgramCache]: Analyzing trace with hash -497461229, now seen corresponding path program 2 times [2024-11-22 21:53:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514816883] [2024-11-22 21:53:54,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:54,510 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:54,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:54,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514816883] [2024-11-22 21:53:54,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514816883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:53:54,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992302816] [2024-11-22 21:53:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:54,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:54,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:54,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-22 21:53:54,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 419 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2024-11-22 21:53:54,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:54,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-22 21:53:54,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:55,030 INFO L124 PetriNetUnfolderBase]: 1258/2086 cut-off events. [2024-11-22 21:53:55,030 INFO L125 PetriNetUnfolderBase]: For 2345/2345 co-relation queries the response was YES. [2024-11-22 21:53:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6002 conditions, 2086 events. 1258/2086 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10648 event pairs, 172 based on Foata normal form. 16/2080 useless extension candidates. Maximal degree in co-relation 3800. Up to 679 conditions per place. [2024-11-22 21:53:55,039 INFO L140 encePairwiseOnDemand]: 40/56 looper letters, 68 selfloop transitions, 37 changer transitions 0/109 dead transitions. [2024-11-22 21:53:55,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 789 flow [2024-11-22 21:53:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-11-22 21:53:55,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-11-22 21:53:55,040 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 419 flow. Second operand 7 states and 203 transitions. [2024-11-22 21:53:55,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 789 flow [2024-11-22 21:53:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 772 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:55,046 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 555 flow [2024-11-22 21:53:55,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=555, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2024-11-22 21:53:55,046 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-22 21:53:55,047 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 555 flow [2024-11-22 21:53:55,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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) [2024-11-22 21:53:55,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:55,047 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:55,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:53:55,047 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:55,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash 380842964, now seen corresponding path program 1 times [2024-11-22 21:53:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:55,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095514993] [2024-11-22 21:53:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:55,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095514993] [2024-11-22 21:53:55,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095514993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:55,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:55,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:55,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568445752] [2024-11-22 21:53:55,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:55,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:55,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-22 21:53:55,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-22 21:53:55,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:55,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-22 21:53:55,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:55,229 INFO L124 PetriNetUnfolderBase]: 1258/2082 cut-off events. [2024-11-22 21:53:55,229 INFO L125 PetriNetUnfolderBase]: For 3557/3557 co-relation queries the response was YES. [2024-11-22 21:53:55,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6821 conditions, 2082 events. 1258/2082 cut-off events. For 3557/3557 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10594 event pairs, 317 based on Foata normal form. 2/2062 useless extension candidates. Maximal degree in co-relation 4386. Up to 1590 conditions per place. [2024-11-22 21:53:55,238 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 71 selfloop transitions, 11 changer transitions 1/87 dead transitions. [2024-11-22 21:53:55,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 772 flow [2024-11-22 21:53:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-22 21:53:55,239 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7440476190476191 [2024-11-22 21:53:55,239 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 555 flow. Second operand 3 states and 125 transitions. [2024-11-22 21:53:55,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 772 flow [2024-11-22 21:53:55,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 715 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:55,247 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 541 flow [2024-11-22 21:53:55,247 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=541, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2024-11-22 21:53:55,247 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-22 21:53:55,247 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 541 flow [2024-11-22 21:53:55,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-22 21:53:55,248 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:55,248 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:55,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:53:55,248 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:55,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:55,248 INFO L85 PathProgramCache]: Analyzing trace with hash 115988913, now seen corresponding path program 1 times [2024-11-22 21:53:55,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:55,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950941905] [2024-11-22 21:53:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:55,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:55,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950941905] [2024-11-22 21:53:55,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950941905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:55,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:55,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:55,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121928600] [2024-11-22 21:53:55,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:55,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:55,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:55,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:55,348 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-22 21:53:55,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 541 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:55,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:55,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-22 21:53:55,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:55,696 INFO L124 PetriNetUnfolderBase]: 1332/2200 cut-off events. [2024-11-22 21:53:55,696 INFO L125 PetriNetUnfolderBase]: For 3908/3908 co-relation queries the response was YES. [2024-11-22 21:53:55,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7301 conditions, 2200 events. 1332/2200 cut-off events. For 3908/3908 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11822 event pairs, 471 based on Foata normal form. 18/2218 useless extension candidates. Maximal degree in co-relation 4712. Up to 1220 conditions per place. [2024-11-22 21:53:55,705 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 148 selfloop transitions, 9 changer transitions 0/159 dead transitions. [2024-11-22 21:53:55,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 159 transitions, 1504 flow [2024-11-22 21:53:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-11-22 21:53:55,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-22 21:53:55,707 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 541 flow. Second operand 5 states and 195 transitions. [2024-11-22 21:53:55,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 159 transitions, 1504 flow [2024-11-22 21:53:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 159 transitions, 1446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:55,714 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 594 flow [2024-11-22 21:53:55,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=594, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-11-22 21:53:55,716 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-11-22 21:53:55,716 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 594 flow [2024-11-22 21:53:55,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:55,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:55,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:55,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:53:55,717 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:55,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash -151584609, now seen corresponding path program 2 times [2024-11-22 21:53:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:55,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332422087] [2024-11-22 21:53:55,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:55,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:55,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:55,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:55,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332422087] [2024-11-22 21:53:55,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332422087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:55,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:55,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:55,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141144487] [2024-11-22 21:53:55,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:55,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:55,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:55,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:55,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 594 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-22 21:53:55,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:55,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:56,087 INFO L124 PetriNetUnfolderBase]: 1058/1742 cut-off events. [2024-11-22 21:53:56,087 INFO L125 PetriNetUnfolderBase]: For 3371/3371 co-relation queries the response was YES. [2024-11-22 21:53:56,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6333 conditions, 1742 events. 1058/1742 cut-off events. For 3371/3371 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8270 event pairs, 575 based on Foata normal form. 32/1774 useless extension candidates. Maximal degree in co-relation 3920. Up to 1413 conditions per place. [2024-11-22 21:53:56,094 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 76 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-11-22 21:53:56,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 828 flow [2024-11-22 21:53:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-22 21:53:56,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-11-22 21:53:56,095 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 594 flow. Second operand 4 states and 138 transitions. [2024-11-22 21:53:56,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 828 flow [2024-11-22 21:53:56,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 784 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:56,101 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 511 flow [2024-11-22 21:53:56,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=511, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-11-22 21:53:56,101 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-11-22 21:53:56,101 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 511 flow [2024-11-22 21:53:56,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-22 21:53:56,101 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:56,102 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:56,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:53:56,102 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:56,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -771018832, now seen corresponding path program 1 times [2024-11-22 21:53:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:56,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518016252] [2024-11-22 21:53:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518016252] [2024-11-22 21:53:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518016252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:56,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:56,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715927825] [2024-11-22 21:53:56,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:56,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:56,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:56,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:56,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 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) [2024-11-22 21:53:56,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:56,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:56,426 INFO L124 PetriNetUnfolderBase]: 1244/2068 cut-off events. [2024-11-22 21:53:56,427 INFO L125 PetriNetUnfolderBase]: For 4481/4481 co-relation queries the response was YES. [2024-11-22 21:53:56,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7749 conditions, 2068 events. 1244/2068 cut-off events. For 4481/4481 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10859 event pairs, 373 based on Foata normal form. 32/2100 useless extension candidates. Maximal degree in co-relation 4855. Up to 1018 conditions per place. [2024-11-22 21:53:56,435 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 122 selfloop transitions, 20 changer transitions 0/143 dead transitions. [2024-11-22 21:53:56,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 1330 flow [2024-11-22 21:53:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-22 21:53:56,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2024-11-22 21:53:56,437 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 511 flow. Second operand 6 states and 219 transitions. [2024-11-22 21:53:56,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 1330 flow [2024-11-22 21:53:56,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 1306 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:56,448 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 723 flow [2024-11-22 21:53:56,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-22 21:53:56,448 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-11-22 21:53:56,448 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 723 flow [2024-11-22 21:53:56,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 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) [2024-11-22 21:53:56,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:56,449 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:56,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:53:56,449 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:56,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash 453940730, now seen corresponding path program 2 times [2024-11-22 21:53:56,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:56,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166288501] [2024-11-22 21:53:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:56,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:56,459 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:56,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:56,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:56,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166288501] [2024-11-22 21:53:56,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166288501] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:56,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:56,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:56,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637526218] [2024-11-22 21:53:56,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:56,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:56,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:56,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:56,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:56,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 723 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-22 21:53:56,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:56,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:56,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:56,741 INFO L124 PetriNetUnfolderBase]: 1276/2132 cut-off events. [2024-11-22 21:53:56,741 INFO L125 PetriNetUnfolderBase]: For 6273/6273 co-relation queries the response was YES. [2024-11-22 21:53:56,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8651 conditions, 2132 events. 1276/2132 cut-off events. For 6273/6273 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10777 event pairs, 577 based on Foata normal form. 46/2178 useless extension candidates. Maximal degree in co-relation 6177. Up to 1439 conditions per place. [2024-11-22 21:53:56,749 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 93 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-11-22 21:53:56,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 1231 flow [2024-11-22 21:53:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-22 21:53:56,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-22 21:53:56,751 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 723 flow. Second operand 5 states and 167 transitions. [2024-11-22 21:53:56,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 1231 flow [2024-11-22 21:53:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 1199 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:56,763 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 794 flow [2024-11-22 21:53:56,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=794, PETRI_PLACES=84, PETRI_TRANSITIONS=81} [2024-11-22 21:53:56,764 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-11-22 21:53:56,764 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 794 flow [2024-11-22 21:53:56,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2024-11-22 21:53:56,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:56,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:56,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:53:56,764 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:56,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:56,765 INFO L85 PathProgramCache]: Analyzing trace with hash 189889830, now seen corresponding path program 1 times [2024-11-22 21:53:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:56,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816095003] [2024-11-22 21:53:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:56,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:56,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816095003] [2024-11-22 21:53:56,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816095003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:56,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:56,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724132634] [2024-11-22 21:53:56,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:56,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:56,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:56,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:56,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 81 transitions, 794 flow. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 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) [2024-11-22 21:53:56,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:56,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:56,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:57,147 INFO L124 PetriNetUnfolderBase]: 1596/2688 cut-off events. [2024-11-22 21:53:57,147 INFO L125 PetriNetUnfolderBase]: For 9010/9010 co-relation queries the response was YES. [2024-11-22 21:53:57,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11107 conditions, 2688 events. 1596/2688 cut-off events. For 9010/9010 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14109 event pairs, 587 based on Foata normal form. 32/2720 useless extension candidates. Maximal degree in co-relation 9645. Up to 1395 conditions per place. [2024-11-22 21:53:57,157 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 118 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2024-11-22 21:53:57,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 1568 flow [2024-11-22 21:53:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:57,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-22 21:53:57,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-11-22 21:53:57,160 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 794 flow. Second operand 7 states and 233 transitions. [2024-11-22 21:53:57,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 1568 flow [2024-11-22 21:53:57,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 1530 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:57,178 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 958 flow [2024-11-22 21:53:57,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=958, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-11-22 21:53:57,178 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-11-22 21:53:57,178 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 958 flow [2024-11-22 21:53:57,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 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) [2024-11-22 21:53:57,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:57,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:57,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:53:57,179 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:57,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash -315236176, now seen corresponding path program 2 times [2024-11-22 21:53:57,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:57,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944558127] [2024-11-22 21:53:57,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:57,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:57,189 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:57,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:57,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:57,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:57,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944558127] [2024-11-22 21:53:57,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944558127] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:57,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293031049] [2024-11-22 21:53:57,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:57,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:57,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:57,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:57,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 958 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2024-11-22 21:53:57,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:57,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:57,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:57,654 INFO L124 PetriNetUnfolderBase]: 1568/2612 cut-off events. [2024-11-22 21:53:57,654 INFO L125 PetriNetUnfolderBase]: For 11740/11740 co-relation queries the response was YES. [2024-11-22 21:53:57,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11490 conditions, 2612 events. 1568/2612 cut-off events. For 11740/11740 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13758 event pairs, 589 based on Foata normal form. 6/2618 useless extension candidates. Maximal degree in co-relation 10295. Up to 1318 conditions per place. [2024-11-22 21:53:57,668 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 112 selfloop transitions, 28 changer transitions 0/141 dead transitions. [2024-11-22 21:53:57,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1647 flow [2024-11-22 21:53:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-22 21:53:57,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-11-22 21:53:57,669 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 958 flow. Second operand 5 states and 183 transitions. [2024-11-22 21:53:57,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1647 flow [2024-11-22 21:53:57,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1597 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:57,696 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 1052 flow [2024-11-22 21:53:57,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1052, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2024-11-22 21:53:57,697 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-11-22 21:53:57,697 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 1052 flow [2024-11-22 21:53:57,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2024-11-22 21:53:57,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:57,698 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:57,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:53:57,698 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:57,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:57,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1366785052, now seen corresponding path program 3 times [2024-11-22 21:53:57,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:57,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102070056] [2024-11-22 21:53:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:57,711 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:53:57,711 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:57,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:57,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:57,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102070056] [2024-11-22 21:53:57,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102070056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:57,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:57,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:57,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848163941] [2024-11-22 21:53:57,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:57,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:57,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:57,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:57,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 1052 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2024-11-22 21:53:57,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:57,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:57,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:58,180 INFO L124 PetriNetUnfolderBase]: 1562/2606 cut-off events. [2024-11-22 21:53:58,181 INFO L125 PetriNetUnfolderBase]: For 13586/13586 co-relation queries the response was YES. [2024-11-22 21:53:58,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11818 conditions, 2606 events. 1562/2606 cut-off events. For 13586/13586 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13385 event pairs, 861 based on Foata normal form. 6/2612 useless extension candidates. Maximal degree in co-relation 10728. Up to 2153 conditions per place. [2024-11-22 21:53:58,197 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 84 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-11-22 21:53:58,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1569 flow [2024-11-22 21:53:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-22 21:53:58,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-11-22 21:53:58,198 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 1052 flow. Second operand 5 states and 169 transitions. [2024-11-22 21:53:58,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1569 flow [2024-11-22 21:53:58,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1513 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:58,226 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 1328 flow [2024-11-22 21:53:58,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1328, PETRI_PLACES=99, PETRI_TRANSITIONS=104} [2024-11-22 21:53:58,226 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-11-22 21:53:58,226 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 1328 flow [2024-11-22 21:53:58,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 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) [2024-11-22 21:53:58,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:58,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:58,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-22 21:53:58,227 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:58,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -149146254, now seen corresponding path program 4 times [2024-11-22 21:53:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:58,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048591891] [2024-11-22 21:53:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:53:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:58,249 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:53:58,249 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:58,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:58,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048591891] [2024-11-22 21:53:58,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048591891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:58,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:58,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-22 21:53:58,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186543653] [2024-11-22 21:53:58,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:58,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:53:58,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:58,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:53:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:53:58,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:53:58,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 104 transitions, 1328 flow. Second operand has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 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) [2024-11-22 21:53:58,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:58,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:53:58,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:59,190 INFO L124 PetriNetUnfolderBase]: 1734/2884 cut-off events. [2024-11-22 21:53:59,190 INFO L125 PetriNetUnfolderBase]: For 16185/16185 co-relation queries the response was YES. [2024-11-22 21:53:59,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13214 conditions, 2884 events. 1734/2884 cut-off events. For 16185/16185 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15059 event pairs, 777 based on Foata normal form. 54/2938 useless extension candidates. Maximal degree in co-relation 12137. Up to 1991 conditions per place. [2024-11-22 21:53:59,206 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 132 selfloop transitions, 71 changer transitions 0/204 dead transitions. [2024-11-22 21:53:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 2509 flow [2024-11-22 21:53:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:53:59,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:53:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 427 transitions. [2024-11-22 21:53:59,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-11-22 21:53:59,207 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 1328 flow. Second operand 14 states and 427 transitions. [2024-11-22 21:53:59,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 2509 flow [2024-11-22 21:53:59,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 204 transitions, 2452 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:59,242 INFO L231 Difference]: Finished difference. Result has 120 places, 141 transitions, 1962 flow [2024-11-22 21:53:59,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1962, PETRI_PLACES=120, PETRI_TRANSITIONS=141} [2024-11-22 21:53:59,242 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-11-22 21:53:59,242 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 141 transitions, 1962 flow [2024-11-22 21:53:59,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 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) [2024-11-22 21:53:59,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:59,242 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:59,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-22 21:53:59,243 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:53:59,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1430305148, now seen corresponding path program 1 times [2024-11-22 21:53:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:59,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112403515] [2024-11-22 21:53:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112403515] [2024-11-22 21:53:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112403515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522665293] [2024-11-22 21:53:59,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:59,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:59,561 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) [2024-11-22 21:53:59,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:53:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:59,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 21:53:59,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:59,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-22 21:53:59,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:53:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:59,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:59,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 21:53:59,966 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:53:59,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-22 21:54:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522665293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:00,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:00,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-22 21:54:00,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899799131] [2024-11-22 21:54:00,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:00,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:54:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:54:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:54:00,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:54:00,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 141 transitions, 1962 flow. Second operand has 20 states, 20 states have (on average 25.25) internal successors, (505), 20 states have internal predecessors, (505), 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) [2024-11-22 21:54:00,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:00,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:54:00,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:05,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:09,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:14,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:18,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:22,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:26,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:30,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:54:34,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:38,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:39,802 INFO L124 PetriNetUnfolderBase]: 3408/5701 cut-off events. [2024-11-22 21:54:39,802 INFO L125 PetriNetUnfolderBase]: For 33315/33315 co-relation queries the response was YES. [2024-11-22 21:54:39,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27865 conditions, 5701 events. 3408/5701 cut-off events. For 33315/33315 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 33679 event pairs, 327 based on Foata normal form. 53/5754 useless extension candidates. Maximal degree in co-relation 25945. Up to 973 conditions per place. [2024-11-22 21:54:39,832 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 273 selfloop transitions, 147 changer transitions 244/665 dead transitions. [2024-11-22 21:54:39,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 665 transitions, 7518 flow [2024-11-22 21:54:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-22 21:54:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-22 21:54:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1556 transitions. [2024-11-22 21:54:39,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911854103343465 [2024-11-22 21:54:39,836 INFO L175 Difference]: Start difference. First operand has 120 places, 141 transitions, 1962 flow. Second operand 47 states and 1556 transitions. [2024-11-22 21:54:39,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 665 transitions, 7518 flow [2024-11-22 21:54:39,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 665 transitions, 7319 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-11-22 21:54:39,919 INFO L231 Difference]: Finished difference. Result has 196 places, 205 transitions, 3088 flow [2024-11-22 21:54:39,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3088, PETRI_PLACES=196, PETRI_TRANSITIONS=205} [2024-11-22 21:54:39,922 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2024-11-22 21:54:39,922 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 205 transitions, 3088 flow [2024-11-22 21:54:39,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.25) internal successors, (505), 20 states have internal predecessors, (505), 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) [2024-11-22 21:54:39,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:39,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:39,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:40,126 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,SelfDestructingSolverStorable22 [2024-11-22 21:54:40,127 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:54:40,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash 279520028, now seen corresponding path program 2 times [2024-11-22 21:54:40,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:40,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809364850] [2024-11-22 21:54:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:40,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:40,147 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:40,148 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:54:40,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:40,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809364850] [2024-11-22 21:54:40,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809364850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:40,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251177405] [2024-11-22 21:54:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:40,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:40,386 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) [2024-11-22 21:54:40,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:54:40,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:40,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:40,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:54:40,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:40,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-22 21:54:40,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:54:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:40,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:40,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 21:54:40,759 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:54:40,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-22 21:54:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:40,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251177405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:40,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:40,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-22 21:54:40,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566928482] [2024-11-22 21:54:40,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:40,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:54:40,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:40,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:54:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:54:41,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:54:41,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 205 transitions, 3088 flow. Second operand has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-11-22 21:54:41,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:41,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:54:41,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:43,021 INFO L124 PetriNetUnfolderBase]: 2649/4515 cut-off events. [2024-11-22 21:54:43,022 INFO L125 PetriNetUnfolderBase]: For 52145/52145 co-relation queries the response was YES. [2024-11-22 21:54:43,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27793 conditions, 4515 events. 2649/4515 cut-off events. For 52145/52145 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 25520 event pairs, 602 based on Foata normal form. 44/4559 useless extension candidates. Maximal degree in co-relation 27620. Up to 2321 conditions per place. [2024-11-22 21:54:43,060 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 201 selfloop transitions, 96 changer transitions 128/426 dead transitions. [2024-11-22 21:54:43,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 426 transitions, 6057 flow [2024-11-22 21:54:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-22 21:54:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-22 21:54:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 898 transitions. [2024-11-22 21:54:43,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5529556650246306 [2024-11-22 21:54:43,063 INFO L175 Difference]: Start difference. First operand has 196 places, 205 transitions, 3088 flow. Second operand 29 states and 898 transitions. [2024-11-22 21:54:43,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 426 transitions, 6057 flow [2024-11-22 21:54:43,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 426 transitions, 5324 flow, removed 305 selfloop flow, removed 21 redundant places. [2024-11-22 21:54:43,260 INFO L231 Difference]: Finished difference. Result has 196 places, 194 transitions, 2635 flow [2024-11-22 21:54:43,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2635, PETRI_PLACES=196, PETRI_TRANSITIONS=194} [2024-11-22 21:54:43,260 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2024-11-22 21:54:43,260 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 194 transitions, 2635 flow [2024-11-22 21:54:43,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.61111111111111) internal successors, (461), 18 states have internal predecessors, (461), 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) [2024-11-22 21:54:43,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:43,261 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:43,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:54:43,465 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,SelfDestructingSolverStorable23 [2024-11-22 21:54:43,465 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:54:43,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash -830220535, now seen corresponding path program 3 times [2024-11-22 21:54:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:43,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152105277] [2024-11-22 21:54:43,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:54:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:43,502 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:54:43,502 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:43,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:43,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152105277] [2024-11-22 21:54:43,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152105277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:54:43,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:54:43,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:54:43,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505022461] [2024-11-22 21:54:43,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:54:43,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:54:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:54:43,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:54:43,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:54:43,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 194 transitions, 2635 flow. Second operand has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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) [2024-11-22 21:54:43,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:43,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:54:43,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:44,248 INFO L124 PetriNetUnfolderBase]: 2251/3796 cut-off events. [2024-11-22 21:54:44,248 INFO L125 PetriNetUnfolderBase]: For 41990/41990 co-relation queries the response was YES. [2024-11-22 21:54:44,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23113 conditions, 3796 events. 2251/3796 cut-off events. For 41990/41990 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 20371 event pairs, 924 based on Foata normal form. 71/3867 useless extension candidates. Maximal degree in co-relation 23045. Up to 2298 conditions per place. [2024-11-22 21:54:44,271 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 178 selfloop transitions, 72 changer transitions 0/251 dead transitions. [2024-11-22 21:54:44,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 251 transitions, 3779 flow [2024-11-22 21:54:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:54:44,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:54:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-11-22 21:54:44,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-11-22 21:54:44,273 INFO L175 Difference]: Start difference. First operand has 196 places, 194 transitions, 2635 flow. Second operand 7 states and 227 transitions. [2024-11-22 21:54:44,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 251 transitions, 3779 flow [2024-11-22 21:54:44,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 251 transitions, 3471 flow, removed 116 selfloop flow, removed 17 redundant places. [2024-11-22 21:54:44,349 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2734 flow [2024-11-22 21:54:44,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=2399, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2734, PETRI_PLACES=160, PETRI_TRANSITIONS=200} [2024-11-22 21:54:44,349 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2024-11-22 21:54:44,349 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2734 flow [2024-11-22 21:54:44,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.285714285714285) internal successors, (177), 7 states have internal predecessors, (177), 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) [2024-11-22 21:54:44,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:44,350 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:44,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-22 21:54:44,350 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-22 21:54:44,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:44,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1734042029, now seen corresponding path program 1 times [2024-11-22 21:54:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:44,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337471271] [2024-11-22 21:54:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:54:44,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:44,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:44,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337471271] [2024-11-22 21:54:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337471271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:44,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140963817] [2024-11-22 21:54:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:54:44,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:44,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:44,593 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) [2024-11-22 21:54:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:54:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:44,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:54:44,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:44,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140963817] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:45,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:45,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-22 21:54:45,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612357374] [2024-11-22 21:54:45,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:45,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 21:54:45,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 21:54:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:54:45,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-22 21:54:45,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2734 flow. Second operand has 23 states, 23 states have (on average 23.91304347826087) internal successors, (550), 23 states have internal predecessors, (550), 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) [2024-11-22 21:54:45,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:45,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-22 21:54:45,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:48,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-22 21:54:56,746 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 32 DAG size of output: 27 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-22 21:55:04,883 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 32 DAG size of output: 28 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-22 21:55:12,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-22 21:55:18,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []