./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 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/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-3061b6d-m [2024-11-19 09:55:59,572 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:55:59,631 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:55:59,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:55:59,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:55:59,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:55:59,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:55:59,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:55:59,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:55:59,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:55:59,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:55:59,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:55:59,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:55:59,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:55:59,662 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:55:59,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:55:59,663 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:55:59,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:55:59,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:55:59,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:55:59,663 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:55:59,666 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:55:59,666 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:55:59,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:55:59,667 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:55:59,667 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:55:59,667 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:55:59,667 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:55:59,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:55:59,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:55:59,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:55:59,668 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:55:59,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:55:59,668 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:55:59,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:55:59,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:55:59,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:55:59,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:55:59,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:55:59,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:55:59,669 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:55:59,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:55:59,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b28fb6889d0d92f72216f98e0edff81bbc7a955814acfd4caad3db76eb7ead3 [2024-11-19 09:55:59,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:55:59,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:55:59,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:55:59,916 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:55:59,917 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:55:59,917 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-19 09:56:01,125 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:56:01,314 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:56:01,315 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2024-11-19 09:56:01,323 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/996567896/9188489ee4bf428bbad490ed3526860f/FLAG744862597 [2024-11-19 09:56:01,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/996567896/9188489ee4bf428bbad490ed3526860f [2024-11-19 09:56:01,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:56:01,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:56:01,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:56:01,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:56:01,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:56:01,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc952c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01, skipping insertion in model container [2024-11-19 09:56:01,709 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:56:01,888 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:56:01,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:56:01,900 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:56:01,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:56:01,942 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:56:01,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01 WrapperNode [2024-11-19 09:56:01,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:56:01,946 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:56:01,946 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:56:01,946 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:56:01,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,961 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,984 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 178 [2024-11-19 09:56:01,985 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:56:01,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:56:01,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:56:01,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:56:01,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:01,995 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,006 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]. [2024-11-19 09:56:02,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,011 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,023 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,028 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:56:02,029 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:56:02,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:56:02,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:56:02,032 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (1/1) ... [2024-11-19 09:56:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:56:02,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:02,059 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) [2024-11-19 09:56:02,060 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 [2024-11-19 09:56:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:56:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:56:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:56:02,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:56:02,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:56:02,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:56:02,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:56:02,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:56:02,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:56:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:56:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:56:02,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:56:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:56:02,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:56:02,094 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:56:02,194 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:56:02,196 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:56:02,572 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:56:02,573 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:56:02,756 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:56:02,756 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:56:02,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:56:02 BoogieIcfgContainer [2024-11-19 09:56:02,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:56:02,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:56:02,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:56:02,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:56:02,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:56:01" (1/3) ... [2024-11-19 09:56:02,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3048c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:56:02, skipping insertion in model container [2024-11-19 09:56:02,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:56:01" (2/3) ... [2024-11-19 09:56:02,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e3048c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:56:02, skipping insertion in model container [2024-11-19 09:56:02,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:56:02" (3/3) ... [2024-11-19 09:56:02,765 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2024-11-19 09:56:02,778 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:56:02,779 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-19 09:56:02,779 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:56:02,829 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:56:02,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 126 flow [2024-11-19 09:56:02,904 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-19 09:56:02,904 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:56:02,909 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. [2024-11-19 09:56:02,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 126 flow [2024-11-19 09:56:02,913 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 53 transitions, 118 flow [2024-11-19 09:56:02,924 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:56:02,949 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;@2cfb43cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:56:02,949 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-19 09:56:02,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:56:02,953 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:56:02,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:56:02,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:02,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:56:02,954 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:02,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash 597900, now seen corresponding path program 1 times [2024-11-19 09:56:02,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:02,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892157724] [2024-11-19 09:56:02,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:03,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:03,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892157724] [2024-11-19 09:56:03,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892157724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:03,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:56:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015094159] [2024-11-19 09:56:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:03,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:03,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:03,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:03,226 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) [2024-11-19 09:56:03,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:03,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:03,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:03,363 INFO L124 PetriNetUnfolderBase]: 182/445 cut-off events. [2024-11-19 09:56:03,363 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-19 09:56:03,365 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. [2024-11-19 09:56:03,368 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 27 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-11-19 09:56:03,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 170 flow [2024-11-19 09:56:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:03,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-19 09:56:03,378 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-19 09:56:03,379 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 118 flow. Second operand 3 states and 103 transitions. [2024-11-19 09:56:03,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 170 flow [2024-11-19 09:56:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:03,384 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 108 flow [2024-11-19 09:56:03,387 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} [2024-11-19 09:56:03,389 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2024-11-19 09:56:03,390 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 108 flow [2024-11-19 09:56:03,390 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) [2024-11-19 09:56:03,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:03,390 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:56:03,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:56:03,391 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:03,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash 597901, now seen corresponding path program 1 times [2024-11-19 09:56:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:03,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350537674] [2024-11-19 09:56:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:03,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:03,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:03,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350537674] [2024-11-19 09:56:03,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350537674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:03,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:03,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:03,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041766825] [2024-11-19 09:56:03,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:03,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:56:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:56:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:56:03,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:03,640 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) [2024-11-19 09:56:03,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:03,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:03,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:03,771 INFO L124 PetriNetUnfolderBase]: 183/448 cut-off events. [2024-11-19 09:56:03,771 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-19 09:56:03,772 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. [2024-11-19 09:56:03,774 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 30 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-11-19 09:56:03,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 53 transitions, 182 flow [2024-11-19 09:56:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-19 09:56:03,778 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-19 09:56:03,779 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 108 flow. Second operand 3 states and 106 transitions. [2024-11-19 09:56:03,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 53 transitions, 182 flow [2024-11-19 09:56:03,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 53 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:03,781 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 123 flow [2024-11-19 09:56:03,781 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} [2024-11-19 09:56:03,782 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-19 09:56:03,782 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 123 flow [2024-11-19 09:56:03,782 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) [2024-11-19 09:56:03,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:03,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:56:03,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:56:03,783 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:03,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 574602240, now seen corresponding path program 1 times [2024-11-19 09:56:03,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977447035] [2024-11-19 09:56:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977447035] [2024-11-19 09:56:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977447035] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161829060] [2024-11-19 09:56:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:03,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:03,986 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) [2024-11-19 09:56:03,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:56:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:04,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:04,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:04,101 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 [2024-11-19 09:56:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:04,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:04,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161829060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:04,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:04,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479632977] [2024-11-19 09:56:04,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:04,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:04,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:04,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:04,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:04,478 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) [2024-11-19 09:56:04,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:04,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:04,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:04,680 INFO L124 PetriNetUnfolderBase]: 183/447 cut-off events. [2024-11-19 09:56:04,680 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-19 09:56:04,681 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. [2024-11-19 09:56:04,683 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 26 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-19 09:56:04,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 185 flow [2024-11-19 09:56:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-19 09:56:04,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-11-19 09:56:04,684 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 123 flow. Second operand 5 states and 153 transitions. [2024-11-19 09:56:04,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 185 flow [2024-11-19 09:56:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:04,686 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 136 flow [2024-11-19 09:56:04,686 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} [2024-11-19 09:56:04,686 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-11-19 09:56:04,687 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 136 flow [2024-11-19 09:56:04,687 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) [2024-11-19 09:56:04,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:04,687 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:56:04,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:56:04,889 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 [2024-11-19 09:56:04,890 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:04,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 635151810, now seen corresponding path program 1 times [2024-11-19 09:56:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96191226] [2024-11-19 09:56:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:04,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96191226] [2024-11-19 09:56:04,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96191226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:04,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:04,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:04,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297121583] [2024-11-19 09:56:04,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:04,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:04,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:04,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:04,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:04,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-19 09:56:04,943 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) [2024-11-19 09:56:04,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:04,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-19 09:56:04,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:05,015 INFO L124 PetriNetUnfolderBase]: 182/446 cut-off events. [2024-11-19 09:56:05,015 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:05,016 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. [2024-11-19 09:56:05,018 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-19 09:56:05,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 192 flow [2024-11-19 09:56:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-19 09:56:05,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-11-19 09:56:05,019 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 136 flow. Second operand 3 states and 107 transitions. [2024-11-19 09:56:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 192 flow [2024-11-19 09:56:05,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 182 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:05,024 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 124 flow [2024-11-19 09:56:05,024 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} [2024-11-19 09:56:05,025 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2024-11-19 09:56:05,025 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 124 flow [2024-11-19 09:56:05,025 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) [2024-11-19 09:56:05,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:05,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:05,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:56:05,025 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:05,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357714, now seen corresponding path program 1 times [2024-11-19 09:56:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870548467] [2024-11-19 09:56:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:05,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:05,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870548467] [2024-11-19 09:56:05,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870548467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:05,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:05,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:56:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625097692] [2024-11-19 09:56:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:05,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:56:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:56:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:56:05,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-19 09:56:05,098 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) [2024-11-19 09:56:05,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:05,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-19 09:56:05,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:05,161 INFO L124 PetriNetUnfolderBase]: 182/385 cut-off events. [2024-11-19 09:56:05,161 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:56:05,162 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. [2024-11-19 09:56:05,163 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 29 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-19 09:56:05,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 170 flow [2024-11-19 09:56:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-19 09:56:05,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2024-11-19 09:56:05,167 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 124 flow. Second operand 4 states and 101 transitions. [2024-11-19 09:56:05,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 170 flow [2024-11-19 09:56:05,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:05,168 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 108 flow [2024-11-19 09:56:05,168 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} [2024-11-19 09:56:05,169 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2024-11-19 09:56:05,169 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 108 flow [2024-11-19 09:56:05,169 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) [2024-11-19 09:56:05,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:05,169 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:05,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:56:05,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:05,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1761357713, now seen corresponding path program 1 times [2024-11-19 09:56:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184663295] [2024-11-19 09:56:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184663295] [2024-11-19 09:56:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184663295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141600761] [2024-11-19 09:56:05,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:05,313 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) [2024-11-19 09:56:05,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:56:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:05,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:56:05,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:05,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:05,479 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 [2024-11-19 09:56:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:05,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141600761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:05,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:05,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646363140] [2024-11-19 09:56:05,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:05,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:05,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:05,725 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:05,726 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) [2024-11-19 09:56:05,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:05,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:05,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:05,901 INFO L124 PetriNetUnfolderBase]: 417/754 cut-off events. [2024-11-19 09:56:05,902 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-19 09:56:05,903 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. [2024-11-19 09:56:05,905 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 51 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-19 09:56:05,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 267 flow [2024-11-19 09:56:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-11-19 09:56:05,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-19 09:56:05,907 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 108 flow. Second operand 5 states and 176 transitions. [2024-11-19 09:56:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 267 flow [2024-11-19 09:56:05,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:05,909 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 121 flow [2024-11-19 09:56:05,909 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} [2024-11-19 09:56:05,909 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2024-11-19 09:56:05,910 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 121 flow [2024-11-19 09:56:05,910 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) [2024-11-19 09:56:05,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:05,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:05,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:56:06,114 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 [2024-11-19 09:56:06,115 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:06,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:06,115 INFO L85 PathProgramCache]: Analyzing trace with hash -496334376, now seen corresponding path program 1 times [2024-11-19 09:56:06,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:06,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841079702] [2024-11-19 09:56:06,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:06,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841079702] [2024-11-19 09:56:06,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841079702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:06,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740599363] [2024-11-19 09:56:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:06,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:06,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:06,215 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) [2024-11-19 09:56:06,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:56:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:06,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:56:06,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:06,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:06,410 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 [2024-11-19 09:56:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740599363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:06,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306516747] [2024-11-19 09:56:06,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:06,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:06,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:06,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:06,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-19 09:56:06,562 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) [2024-11-19 09:56:06,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:06,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-19 09:56:06,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:06,776 INFO L124 PetriNetUnfolderBase]: 756/1283 cut-off events. [2024-11-19 09:56:06,776 INFO L125 PetriNetUnfolderBase]: For 161/209 co-relation queries the response was YES. [2024-11-19 09:56:06,778 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. [2024-11-19 09:56:06,782 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 51 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-19 09:56:06,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 282 flow [2024-11-19 09:56:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-11-19 09:56:06,784 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-19 09:56:06,784 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 121 flow. Second operand 5 states and 150 transitions. [2024-11-19 09:56:06,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 282 flow [2024-11-19 09:56:06,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:06,787 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 158 flow [2024-11-19 09:56:06,787 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} [2024-11-19 09:56:06,788 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -4 predicate places. [2024-11-19 09:56:06,788 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 158 flow [2024-11-19 09:56:06,789 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) [2024-11-19 09:56:06,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:06,789 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:06,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:56:06,992 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 [2024-11-19 09:56:06,993 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:06,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash -447627277, now seen corresponding path program 1 times [2024-11-19 09:56:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:06,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367268925] [2024-11-19 09:56:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:07,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367268925] [2024-11-19 09:56:07,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367268925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:07,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174027691] [2024-11-19 09:56:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:07,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:07,121 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) [2024-11-19 09:56:07,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:56:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:07,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:07,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:07,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:07,332 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 [2024-11-19 09:56:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:07,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174027691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:07,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:07,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:56:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714590791] [2024-11-19 09:56:07,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:07,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:56:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:56:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:56:07,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:07,896 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) [2024-11-19 09:56:07,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:07,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:07,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:08,287 INFO L124 PetriNetUnfolderBase]: 1262/2336 cut-off events. [2024-11-19 09:56:08,287 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-11-19 09:56:08,290 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. [2024-11-19 09:56:08,296 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 103 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-11-19 09:56:08,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 128 transitions, 634 flow [2024-11-19 09:56:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:56:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:56:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 296 transitions. [2024-11-19 09:56:08,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-19 09:56:08,297 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 158 flow. Second operand 8 states and 296 transitions. [2024-11-19 09:56:08,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 128 transitions, 634 flow [2024-11-19 09:56:08,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 128 transitions, 612 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:08,300 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 270 flow [2024-11-19 09:56:08,300 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} [2024-11-19 09:56:08,300 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 5 predicate places. [2024-11-19 09:56:08,300 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 270 flow [2024-11-19 09:56:08,301 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) [2024-11-19 09:56:08,301 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:08,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:08,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:56:08,505 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 [2024-11-19 09:56:08,505 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:08,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:08,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1793504182, now seen corresponding path program 1 times [2024-11-19 09:56:08,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:08,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607137526] [2024-11-19 09:56:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607137526] [2024-11-19 09:56:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607137526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518245137] [2024-11-19 09:56:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:08,597 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) [2024-11-19 09:56:08,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:56:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:08,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:08,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:08,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:08,745 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 [2024-11-19 09:56:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:08,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518245137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:08,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-19 09:56:08,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782718139] [2024-11-19 09:56:08,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:08,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:56:08,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:56:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:56:09,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-19 09:56:09,059 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) [2024-11-19 09:56:09,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:09,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-19 09:56:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:09,350 INFO L124 PetriNetUnfolderBase]: 1573/2649 cut-off events. [2024-11-19 09:56:09,350 INFO L125 PetriNetUnfolderBase]: For 1645/1741 co-relation queries the response was YES. [2024-11-19 09:56:09,353 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. [2024-11-19 09:56:09,361 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 82 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2024-11-19 09:56:09,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 593 flow [2024-11-19 09:56:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-11-19 09:56:09,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-11-19 09:56:09,362 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 270 flow. Second operand 7 states and 216 transitions. [2024-11-19 09:56:09,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 593 flow [2024-11-19 09:56:09,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 591 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:09,367 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 338 flow [2024-11-19 09:56:09,367 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} [2024-11-19 09:56:09,367 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-19 09:56:09,368 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 338 flow [2024-11-19 09:56:09,368 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) [2024-11-19 09:56:09,368 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:09,368 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:09,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:56:09,568 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 [2024-11-19 09:56:09,569 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:09,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash -606417888, now seen corresponding path program 2 times [2024-11-19 09:56:09,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401166765] [2024-11-19 09:56:09,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:09,589 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:09,589 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:09,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401166765] [2024-11-19 09:56:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401166765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857390014] [2024-11-19 09:56:09,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:09,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:09,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:56:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:56:09,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:09,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:09,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:56:09,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:09,769 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 [2024-11-19 09:56:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:09,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:56:10,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857390014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:10,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:10,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:56:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12235294] [2024-11-19 09:56:10,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:10,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:56:10,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:10,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:56:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:56:10,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-19 09:56:10,254 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) [2024-11-19 09:56:10,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:10,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-19 09:56:10,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:10,523 INFO L124 PetriNetUnfolderBase]: 1234/2242 cut-off events. [2024-11-19 09:56:10,523 INFO L125 PetriNetUnfolderBase]: For 1270/1270 co-relation queries the response was YES. [2024-11-19 09:56:10,526 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. [2024-11-19 09:56:10,532 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 70 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-19 09:56:10,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 640 flow [2024-11-19 09:56:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-19 09:56:10,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-19 09:56:10,533 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 338 flow. Second operand 5 states and 167 transitions. [2024-11-19 09:56:10,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 640 flow [2024-11-19 09:56:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 605 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:56:10,537 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 328 flow [2024-11-19 09:56:10,537 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} [2024-11-19 09:56:10,538 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-11-19 09:56:10,539 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 328 flow [2024-11-19 09:56:10,539 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) [2024-11-19 09:56:10,539 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:10,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:10,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:10,743 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 [2024-11-19 09:56:10,744 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:10,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1165962537, now seen corresponding path program 2 times [2024-11-19 09:56:10,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:10,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589469230] [2024-11-19 09:56:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:10,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:10,754 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:10,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:56:10,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589469230] [2024-11-19 09:56:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589469230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:10,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:56:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143890856] [2024-11-19 09:56:10,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:10,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:10,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-19 09:56:10,935 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) [2024-11-19 09:56:10,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:10,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-19 09:56:10,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:11,132 INFO L124 PetriNetUnfolderBase]: 1441/2409 cut-off events. [2024-11-19 09:56:11,132 INFO L125 PetriNetUnfolderBase]: For 2875/2875 co-relation queries the response was YES. [2024-11-19 09:56:11,135 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. [2024-11-19 09:56:11,141 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 57 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-11-19 09:56:11,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 69 transitions, 505 flow [2024-11-19 09:56:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-19 09:56:11,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-11-19 09:56:11,143 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 328 flow. Second operand 5 states and 132 transitions. [2024-11-19 09:56:11,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 69 transitions, 505 flow [2024-11-19 09:56:11,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 473 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:11,146 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 312 flow [2024-11-19 09:56:11,146 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} [2024-11-19 09:56:11,146 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-11-19 09:56:11,146 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 312 flow [2024-11-19 09:56:11,146 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) [2024-11-19 09:56:11,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:11,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:11,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:56:11,147 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:11,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:11,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1274638176, now seen corresponding path program 1 times [2024-11-19 09:56:11,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:11,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646983829] [2024-11-19 09:56:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:11,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646983829] [2024-11-19 09:56:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646983829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655511340] [2024-11-19 09:56:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:11,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:11,282 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) [2024-11-19 09:56:11,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:56:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:11,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:56:11,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:11,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:11,472 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 [2024-11-19 09:56:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:11,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655511340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:11,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:11,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:56:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599380971] [2024-11-19 09:56:11,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:11,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:56:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:11,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:56:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:56:12,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-19 09:56:12,051 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) [2024-11-19 09:56:12,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:12,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-19 09:56:12,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:12,401 INFO L124 PetriNetUnfolderBase]: 1350/2260 cut-off events. [2024-11-19 09:56:12,402 INFO L125 PetriNetUnfolderBase]: For 1762/1762 co-relation queries the response was YES. [2024-11-19 09:56:12,405 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. [2024-11-19 09:56:12,417 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 89 selfloop transitions, 23 changer transitions 0/116 dead transitions. [2024-11-19 09:56:12,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 116 transitions, 701 flow [2024-11-19 09:56:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:56:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:56:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-11-19 09:56:12,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5491071428571429 [2024-11-19 09:56:12,419 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 312 flow. Second operand 8 states and 246 transitions. [2024-11-19 09:56:12,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 116 transitions, 701 flow [2024-11-19 09:56:12,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 116 transitions, 679 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:56:12,424 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 419 flow [2024-11-19 09:56:12,424 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} [2024-11-19 09:56:12,426 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 11 predicate places. [2024-11-19 09:56:12,426 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 419 flow [2024-11-19 09:56:12,426 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) [2024-11-19 09:56:12,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:12,427 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:56:12,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:56:12,627 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 [2024-11-19 09:56:12,627 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:12,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:12,628 INFO L85 PathProgramCache]: Analyzing trace with hash -497461229, now seen corresponding path program 2 times [2024-11-19 09:56:12,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:12,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074053937] [2024-11-19 09:56:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:12,640 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:12,640 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:56:12,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:12,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074053937] [2024-11-19 09:56:12,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074053937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:56:12,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640312489] [2024-11-19 09:56:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:12,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:12,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:12,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 56 [2024-11-19 09:56:12,901 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) [2024-11-19 09:56:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 56 [2024-11-19 09:56:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:13,142 INFO L124 PetriNetUnfolderBase]: 1258/2086 cut-off events. [2024-11-19 09:56:13,142 INFO L125 PetriNetUnfolderBase]: For 2345/2345 co-relation queries the response was YES. [2024-11-19 09:56:13,145 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. [2024-11-19 09:56:13,150 INFO L140 encePairwiseOnDemand]: 40/56 looper letters, 68 selfloop transitions, 37 changer transitions 0/109 dead transitions. [2024-11-19 09:56:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 789 flow [2024-11-19 09:56:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-11-19 09:56:13,153 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-11-19 09:56:13,153 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 419 flow. Second operand 7 states and 203 transitions. [2024-11-19 09:56:13,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 789 flow [2024-11-19 09:56:13,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 109 transitions, 772 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:56:13,159 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 555 flow [2024-11-19 09:56:13,159 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} [2024-11-19 09:56:13,160 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-19 09:56:13,160 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 555 flow [2024-11-19 09:56:13,160 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) [2024-11-19 09:56:13,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:13,160 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] [2024-11-19 09:56:13,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:56:13,160 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:13,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 380842964, now seen corresponding path program 1 times [2024-11-19 09:56:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:13,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604044527] [2024-11-19 09:56:13,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:13,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:13,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604044527] [2024-11-19 09:56:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604044527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:13,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:13,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:56:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021067255] [2024-11-19 09:56:13,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:13,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:56:13,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:56:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:56:13,230 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-19 09:56:13,231 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) [2024-11-19 09:56:13,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:13,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-19 09:56:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:13,380 INFO L124 PetriNetUnfolderBase]: 1258/2082 cut-off events. [2024-11-19 09:56:13,380 INFO L125 PetriNetUnfolderBase]: For 3557/3557 co-relation queries the response was YES. [2024-11-19 09:56:13,383 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. [2024-11-19 09:56:13,389 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 71 selfloop transitions, 11 changer transitions 1/87 dead transitions. [2024-11-19 09:56:13,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 772 flow [2024-11-19 09:56:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:56:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:56:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-19 09:56:13,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7440476190476191 [2024-11-19 09:56:13,390 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 555 flow. Second operand 3 states and 125 transitions. [2024-11-19 09:56:13,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 772 flow [2024-11-19 09:56:13,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 715 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:13,399 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 541 flow [2024-11-19 09:56:13,400 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} [2024-11-19 09:56:13,401 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2024-11-19 09:56:13,401 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 541 flow [2024-11-19 09:56:13,401 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) [2024-11-19 09:56:13,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:13,401 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] [2024-11-19 09:56:13,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:56:13,401 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:13,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:13,402 INFO L85 PathProgramCache]: Analyzing trace with hash 115988913, now seen corresponding path program 1 times [2024-11-19 09:56:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:13,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391540518] [2024-11-19 09:56:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:13,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:13,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391540518] [2024-11-19 09:56:13,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391540518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:13,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:13,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:13,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274531170] [2024-11-19 09:56:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:13,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:13,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:13,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-19 09:56:13,482 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) [2024-11-19 09:56:13,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:13,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-19 09:56:13,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:13,778 INFO L124 PetriNetUnfolderBase]: 1332/2200 cut-off events. [2024-11-19 09:56:13,778 INFO L125 PetriNetUnfolderBase]: For 3908/3908 co-relation queries the response was YES. [2024-11-19 09:56:13,782 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. [2024-11-19 09:56:13,787 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 148 selfloop transitions, 9 changer transitions 0/159 dead transitions. [2024-11-19 09:56:13,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 159 transitions, 1504 flow [2024-11-19 09:56:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:13,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-11-19 09:56:13,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-19 09:56:13,789 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 541 flow. Second operand 5 states and 195 transitions. [2024-11-19 09:56:13,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 159 transitions, 1504 flow [2024-11-19 09:56:13,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 159 transitions, 1446 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:13,797 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 594 flow [2024-11-19 09:56:13,797 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} [2024-11-19 09:56:13,798 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-11-19 09:56:13,798 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 594 flow [2024-11-19 09:56:13,799 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) [2024-11-19 09:56:13,799 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:13,799 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] [2024-11-19 09:56:13,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:56:13,799 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:13,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash -151584609, now seen corresponding path program 2 times [2024-11-19 09:56:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567627566] [2024-11-19 09:56:13,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:13,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:13,816 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567627566] [2024-11-19 09:56:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567627566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067309076] [2024-11-19 09:56:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:13,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:13,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:13,988 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) [2024-11-19 09:56:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:14,185 INFO L124 PetriNetUnfolderBase]: 1058/1742 cut-off events. [2024-11-19 09:56:14,186 INFO L125 PetriNetUnfolderBase]: For 3371/3371 co-relation queries the response was YES. [2024-11-19 09:56:14,188 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. [2024-11-19 09:56:14,191 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 76 selfloop transitions, 12 changer transitions 0/89 dead transitions. [2024-11-19 09:56:14,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 828 flow [2024-11-19 09:56:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:56:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:56:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-19 09:56:14,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-11-19 09:56:14,192 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 594 flow. Second operand 4 states and 138 transitions. [2024-11-19 09:56:14,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 828 flow [2024-11-19 09:56:14,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 784 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:14,197 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 511 flow [2024-11-19 09:56:14,198 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} [2024-11-19 09:56:14,198 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-11-19 09:56:14,198 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 511 flow [2024-11-19 09:56:14,198 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) [2024-11-19 09:56:14,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:14,198 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] [2024-11-19 09:56:14,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:56:14,199 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:14,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash -771018832, now seen corresponding path program 1 times [2024-11-19 09:56:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102861499] [2024-11-19 09:56:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:14,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102861499] [2024-11-19 09:56:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102861499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:56:14,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106374037] [2024-11-19 09:56:14,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:14,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:14,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:14,322 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) [2024-11-19 09:56:14,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:14,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:14,535 INFO L124 PetriNetUnfolderBase]: 1244/2068 cut-off events. [2024-11-19 09:56:14,535 INFO L125 PetriNetUnfolderBase]: For 4481/4481 co-relation queries the response was YES. [2024-11-19 09:56:14,539 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. [2024-11-19 09:56:14,544 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 122 selfloop transitions, 20 changer transitions 0/143 dead transitions. [2024-11-19 09:56:14,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 143 transitions, 1330 flow [2024-11-19 09:56:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:56:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:56:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-19 09:56:14,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6517857142857143 [2024-11-19 09:56:14,545 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 511 flow. Second operand 6 states and 219 transitions. [2024-11-19 09:56:14,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 143 transitions, 1330 flow [2024-11-19 09:56:14,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 1306 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:14,558 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 723 flow [2024-11-19 09:56:14,558 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} [2024-11-19 09:56:14,558 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-11-19 09:56:14,558 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 723 flow [2024-11-19 09:56:14,558 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) [2024-11-19 09:56:14,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:14,559 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] [2024-11-19 09:56:14,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:56:14,559 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:14,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash 453940730, now seen corresponding path program 2 times [2024-11-19 09:56:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251035617] [2024-11-19 09:56:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:14,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251035617] [2024-11-19 09:56:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251035617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313050977] [2024-11-19 09:56:14,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:14,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:14,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:14,661 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) [2024-11-19 09:56:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:14,860 INFO L124 PetriNetUnfolderBase]: 1276/2132 cut-off events. [2024-11-19 09:56:14,861 INFO L125 PetriNetUnfolderBase]: For 6273/6273 co-relation queries the response was YES. [2024-11-19 09:56:14,864 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. [2024-11-19 09:56:14,870 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 93 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-11-19 09:56:14,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 1231 flow [2024-11-19 09:56:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-19 09:56:14,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-11-19 09:56:14,871 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 723 flow. Second operand 5 states and 167 transitions. [2024-11-19 09:56:14,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 1231 flow [2024-11-19 09:56:14,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 116 transitions, 1199 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:14,884 INFO L231 Difference]: Finished difference. Result has 84 places, 81 transitions, 794 flow [2024-11-19 09:56:14,885 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} [2024-11-19 09:56:14,885 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-11-19 09:56:14,885 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 81 transitions, 794 flow [2024-11-19 09:56:14,885 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) [2024-11-19 09:56:14,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:14,885 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] [2024-11-19 09:56:14,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:56:14,886 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:14,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash 189889830, now seen corresponding path program 1 times [2024-11-19 09:56:14,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:14,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871363919] [2024-11-19 09:56:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:14,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:14,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:14,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871363919] [2024-11-19 09:56:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871363919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:14,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:14,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:56:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453188230] [2024-11-19 09:56:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:14,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:56:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:56:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:56:14,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:14,984 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) [2024-11-19 09:56:14,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:14,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:14,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:15,332 INFO L124 PetriNetUnfolderBase]: 1596/2688 cut-off events. [2024-11-19 09:56:15,332 INFO L125 PetriNetUnfolderBase]: For 9010/9010 co-relation queries the response was YES. [2024-11-19 09:56:15,337 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. [2024-11-19 09:56:15,343 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 118 selfloop transitions, 26 changer transitions 0/145 dead transitions. [2024-11-19 09:56:15,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 145 transitions, 1568 flow [2024-11-19 09:56:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:56:15,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:56:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-19 09:56:15,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5943877551020408 [2024-11-19 09:56:15,344 INFO L175 Difference]: Start difference. First operand has 84 places, 81 transitions, 794 flow. Second operand 7 states and 233 transitions. [2024-11-19 09:56:15,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 145 transitions, 1568 flow [2024-11-19 09:56:15,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 1530 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:15,362 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 958 flow [2024-11-19 09:56:15,362 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} [2024-11-19 09:56:15,363 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-11-19 09:56:15,363 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 958 flow [2024-11-19 09:56:15,363 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) [2024-11-19 09:56:15,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:15,363 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] [2024-11-19 09:56:15,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:56:15,364 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:15,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash -315236176, now seen corresponding path program 2 times [2024-11-19 09:56:15,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:15,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540219029] [2024-11-19 09:56:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:15,378 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:56:15,378 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:15,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:15,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540219029] [2024-11-19 09:56:15,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540219029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:15,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:15,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:15,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116187712] [2024-11-19 09:56:15,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:15,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:15,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:15,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:15,466 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) [2024-11-19 09:56:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:15,753 INFO L124 PetriNetUnfolderBase]: 1568/2612 cut-off events. [2024-11-19 09:56:15,753 INFO L125 PetriNetUnfolderBase]: For 11740/11740 co-relation queries the response was YES. [2024-11-19 09:56:15,758 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. [2024-11-19 09:56:15,767 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 112 selfloop transitions, 28 changer transitions 0/141 dead transitions. [2024-11-19 09:56:15,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 1647 flow [2024-11-19 09:56:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-19 09:56:15,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-11-19 09:56:15,768 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 958 flow. Second operand 5 states and 183 transitions. [2024-11-19 09:56:15,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 1647 flow [2024-11-19 09:56:15,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 1597 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 09:56:15,793 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 1052 flow [2024-11-19 09:56:15,794 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} [2024-11-19 09:56:15,794 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 40 predicate places. [2024-11-19 09:56:15,794 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 1052 flow [2024-11-19 09:56:15,794 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) [2024-11-19 09:56:15,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:15,795 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] [2024-11-19 09:56:15,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:56:15,795 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:15,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1366785052, now seen corresponding path program 3 times [2024-11-19 09:56:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:15,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166614901] [2024-11-19 09:56:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:56:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:15,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:56:15,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166614901] [2024-11-19 09:56:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166614901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:15,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:15,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:56:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485737072] [2024-11-19 09:56:15,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:15,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:56:15,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:56:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:56:15,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:15,882 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) [2024-11-19 09:56:15,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:15,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:15,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:16,200 INFO L124 PetriNetUnfolderBase]: 1562/2606 cut-off events. [2024-11-19 09:56:16,200 INFO L125 PetriNetUnfolderBase]: For 13586/13586 co-relation queries the response was YES. [2024-11-19 09:56:16,207 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. [2024-11-19 09:56:16,215 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 84 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-11-19 09:56:16,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1569 flow [2024-11-19 09:56:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:56:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:56:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-19 09:56:16,217 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-11-19 09:56:16,217 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 1052 flow. Second operand 5 states and 169 transitions. [2024-11-19 09:56:16,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1569 flow [2024-11-19 09:56:16,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 120 transitions, 1513 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 09:56:16,245 INFO L231 Difference]: Finished difference. Result has 99 places, 104 transitions, 1328 flow [2024-11-19 09:56:16,245 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} [2024-11-19 09:56:16,245 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 45 predicate places. [2024-11-19 09:56:16,245 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 104 transitions, 1328 flow [2024-11-19 09:56:16,245 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) [2024-11-19 09:56:16,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:16,246 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] [2024-11-19 09:56:16,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 09:56:16,246 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:16,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash -149146254, now seen corresponding path program 4 times [2024-11-19 09:56:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:16,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236712547] [2024-11-19 09:56:16,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:56:16,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:16,265 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:56:16,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236712547] [2024-11-19 09:56:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236712547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:56:16,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:56:16,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-19 09:56:16,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803369674] [2024-11-19 09:56:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:56:16,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:56:16,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:56:16,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:56:16,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:16,455 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) [2024-11-19 09:56:16,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:16,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:16,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:17,039 INFO L124 PetriNetUnfolderBase]: 1734/2884 cut-off events. [2024-11-19 09:56:17,039 INFO L125 PetriNetUnfolderBase]: For 16185/16185 co-relation queries the response was YES. [2024-11-19 09:56:17,046 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. [2024-11-19 09:56:17,053 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 132 selfloop transitions, 71 changer transitions 0/204 dead transitions. [2024-11-19 09:56:17,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 204 transitions, 2509 flow [2024-11-19 09:56:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:56:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:56:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 427 transitions. [2024-11-19 09:56:17,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-11-19 09:56:17,054 INFO L175 Difference]: Start difference. First operand has 99 places, 104 transitions, 1328 flow. Second operand 14 states and 427 transitions. [2024-11-19 09:56:17,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 204 transitions, 2509 flow [2024-11-19 09:56:17,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 204 transitions, 2452 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:17,087 INFO L231 Difference]: Finished difference. Result has 120 places, 141 transitions, 1962 flow [2024-11-19 09:56:17,087 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} [2024-11-19 09:56:17,087 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 66 predicate places. [2024-11-19 09:56:17,087 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 141 transitions, 1962 flow [2024-11-19 09:56:17,088 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) [2024-11-19 09:56:17,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:17,088 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] [2024-11-19 09:56:17,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:56:17,088 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:17,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1430305148, now seen corresponding path program 1 times [2024-11-19 09:56:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530357975] [2024-11-19 09:56:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:17,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:17,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:17,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530357975] [2024-11-19 09:56:17,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530357975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:17,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092656078] [2024-11-19 09:56:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:56:17,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:17,319 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) [2024-11-19 09:56:17,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:56:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:56:17,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 09:56:17,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:17,401 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 [2024-11-19 09:56:17,480 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 [2024-11-19 09:56:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:17,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:17,700 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 [2024-11-19 09:56:17,712 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:56:17,712 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 [2024-11-19 09:56:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092656078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:17,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:17,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-19 09:56:17,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971407659] [2024-11-19 09:56:17,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:17,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:56:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:56:17,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:56:18,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:18,468 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) [2024-11-19 09:56:18,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:18,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:18,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:23,246 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 [] [2024-11-19 09:56:27,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:31,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:35,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:39,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:43,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:47,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:56:51,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:55,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-19 09:56:56,788 INFO L124 PetriNetUnfolderBase]: 3408/5701 cut-off events. [2024-11-19 09:56:56,789 INFO L125 PetriNetUnfolderBase]: For 33315/33315 co-relation queries the response was YES. [2024-11-19 09:56:56,803 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. [2024-11-19 09:56:56,812 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 273 selfloop transitions, 147 changer transitions 244/665 dead transitions. [2024-11-19 09:56:56,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 665 transitions, 7518 flow [2024-11-19 09:56:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-19 09:56:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-19 09:56:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1556 transitions. [2024-11-19 09:56:56,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911854103343465 [2024-11-19 09:56:56,816 INFO L175 Difference]: Start difference. First operand has 120 places, 141 transitions, 1962 flow. Second operand 47 states and 1556 transitions. [2024-11-19 09:56:56,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 665 transitions, 7518 flow [2024-11-19 09:56:56,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 665 transitions, 7319 flow, removed 65 selfloop flow, removed 1 redundant places. [2024-11-19 09:56:56,897 INFO L231 Difference]: Finished difference. Result has 196 places, 205 transitions, 3088 flow [2024-11-19 09:56:56,898 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} [2024-11-19 09:56:56,898 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2024-11-19 09:56:56,898 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 205 transitions, 3088 flow [2024-11-19 09:56:56,898 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) [2024-11-19 09:56:56,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:56,899 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] [2024-11-19 09:56:56,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:56:57,099 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 [2024-11-19 09:56:57,099 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:57,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash 279520028, now seen corresponding path program 2 times [2024-11-19 09:56:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102324051] [2024-11-19 09:56:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:56:57,116 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:56:57,116 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:56:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:56:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102324051] [2024-11-19 09:56:57,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102324051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:56:57,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458293373] [2024-11-19 09:56:57,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:56:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:56:57,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:56:57,227 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) [2024-11-19 09:56:57,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:56:57,290 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:56:57,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:57,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:56:57,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:57,318 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 [2024-11-19 09:56:57,485 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 [2024-11-19 09:56:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:57,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:57,674 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 [2024-11-19 09:56:57,681 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-19 09:56:57,682 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 [2024-11-19 09:56:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:57,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458293373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:56:57,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:56:57,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-19 09:56:57,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941603280] [2024-11-19 09:56:57,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:56:57,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:56:57,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:56:57,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:56:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:56:58,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:56:58,233 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) [2024-11-19 09:56:58,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:56:58,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:56:58,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:56:59,493 INFO L124 PetriNetUnfolderBase]: 2649/4515 cut-off events. [2024-11-19 09:56:59,493 INFO L125 PetriNetUnfolderBase]: For 52145/52145 co-relation queries the response was YES. [2024-11-19 09:56:59,512 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. [2024-11-19 09:56:59,524 INFO L140 encePairwiseOnDemand]: 38/56 looper letters, 201 selfloop transitions, 96 changer transitions 128/426 dead transitions. [2024-11-19 09:56:59,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 426 transitions, 6057 flow [2024-11-19 09:56:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 09:56:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-19 09:56:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 898 transitions. [2024-11-19 09:56:59,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5529556650246306 [2024-11-19 09:56:59,526 INFO L175 Difference]: Start difference. First operand has 196 places, 205 transitions, 3088 flow. Second operand 29 states and 898 transitions. [2024-11-19 09:56:59,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 426 transitions, 6057 flow [2024-11-19 09:56:59,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 426 transitions, 5324 flow, removed 305 selfloop flow, removed 21 redundant places. [2024-11-19 09:56:59,755 INFO L231 Difference]: Finished difference. Result has 196 places, 194 transitions, 2635 flow [2024-11-19 09:56:59,755 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} [2024-11-19 09:56:59,755 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 142 predicate places. [2024-11-19 09:56:59,756 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 194 transitions, 2635 flow [2024-11-19 09:56:59,756 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) [2024-11-19 09:56:59,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:56:59,756 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] [2024-11-19 09:56:59,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:56:59,960 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 [2024-11-19 09:56:59,960 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:56:59,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:56:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -830220535, now seen corresponding path program 3 times [2024-11-19 09:56:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:56:59,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257162996] [2024-11-19 09:56:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:56:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:00,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:57:00,037 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:57:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:57:00,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:00,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257162996] [2024-11-19 09:57:00,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257162996] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:57:00,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:57:00,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-19 09:57:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426468911] [2024-11-19 09:57:00,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:57:00,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:57:00,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:00,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:57:00,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:57:00,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:57:00,209 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) [2024-11-19 09:57:00,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:00,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:57:00,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:00,722 INFO L124 PetriNetUnfolderBase]: 2251/3796 cut-off events. [2024-11-19 09:57:00,723 INFO L125 PetriNetUnfolderBase]: For 41990/41990 co-relation queries the response was YES. [2024-11-19 09:57:00,738 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. [2024-11-19 09:57:00,748 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 178 selfloop transitions, 72 changer transitions 0/251 dead transitions. [2024-11-19 09:57:00,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 251 transitions, 3779 flow [2024-11-19 09:57:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:57:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:57:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-11-19 09:57:00,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5790816326530612 [2024-11-19 09:57:00,749 INFO L175 Difference]: Start difference. First operand has 196 places, 194 transitions, 2635 flow. Second operand 7 states and 227 transitions. [2024-11-19 09:57:00,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 251 transitions, 3779 flow [2024-11-19 09:57:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 251 transitions, 3471 flow, removed 116 selfloop flow, removed 17 redundant places. [2024-11-19 09:57:00,863 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2734 flow [2024-11-19 09:57:00,863 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} [2024-11-19 09:57:00,864 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2024-11-19 09:57:00,864 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2734 flow [2024-11-19 09:57:00,864 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) [2024-11-19 09:57:00,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:57:00,864 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] [2024-11-19 09:57:00,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 09:57:00,864 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2024-11-19 09:57:00,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:57:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1734042029, now seen corresponding path program 1 times [2024-11-19 09:57:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:57:00,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334864332] [2024-11-19 09:57:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:00,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:57:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:01,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:57:01,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334864332] [2024-11-19 09:57:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334864332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:57:01,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446434362] [2024-11-19 09:57:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:57:01,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:57:01,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:57:01,042 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) [2024-11-19 09:57:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:57:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:57:01,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:57:01,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:57:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:01,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:57:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:57:01,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446434362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:57:01,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:57:01,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 24 [2024-11-19 09:57:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626838607] [2024-11-19 09:57:01,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:57:01,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:57:01,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:57:01,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:57:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:57:06,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 09:57:06,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-19 09:57:06,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2734 flow. Second operand has 24 states, 24 states have (on average 23.916666666666668) internal successors, (574), 24 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:57:06,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:57:06,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-19 09:57:06,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:57:15,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-19 09:57:27,692 WARN L286 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-19 09:57:31,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []