./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:49:17,510 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:49:17,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:49:17,589 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:49:17,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:49:17,617 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:49:17,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:49:17,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:49:17,619 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:49:17,619 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:49:17,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:49:17,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:49:17,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:49:17,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:49:17,621 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:49:17,621 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:49:17,621 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:49:17,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:49:17,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:49:17,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:49:17,623 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:49:17,623 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:49:17,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:49:17,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:49:17,624 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:49:17,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:49:17,625 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:49:17,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:49:17,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:49:17,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:49:17,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:49:17,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:49:17,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:49:17,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:49:17,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:49:17,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:49:17,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:49:17,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:49:17,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:49:17,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:49:17,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:49:17,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:49:17,631 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2024-11-22 21:49:17,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:49:17,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:49:17,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:49:17,898 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:49:17,899 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:49:17,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-22 21:49:19,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:49:19,545 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:49:19,546 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-22 21:49:19,553 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5a520f4/a08d393ebc774d48a5d94313735eea29/FLAG0629dbdd5 [2024-11-22 21:49:19,566 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b5a520f4/a08d393ebc774d48a5d94313735eea29 [2024-11-22 21:49:19,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:49:19,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:49:19,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:49:19,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:49:19,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:49:19,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af61ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19, skipping insertion in model container [2024-11-22 21:49:19,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,600 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:49:19,818 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:49:19,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:49:19,838 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:49:19,871 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:49:19,889 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:49:19,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19 WrapperNode [2024-11-22 21:49:19,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:49:19,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:49:19,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:49:19,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:49:19,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,928 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-22 21:49:19,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:49:19,932 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:49:19,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:49:19,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:49:19,945 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,948 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,963 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:49:19,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:49:19,984 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:49:19,984 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:49:19,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:49:19,985 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (1/1) ... [2024-11-22 21:49:19,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:49:20,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:20,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:49:20,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:49:20,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:49:20,076 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:49:20,076 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:49:20,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:49:20,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:49:20,077 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:49:20,077 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:49:20,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:49:20,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:49:20,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:49:20,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:49:20,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:49:20,080 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:49:20,173 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:49:20,175 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:49:20,466 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:49:20,467 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:49:20,741 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:49:20,741 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:49:20,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:20 BoogieIcfgContainer [2024-11-22 21:49:20,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:49:20,745 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:49:20,745 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:49:20,748 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:49:20,749 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:49:19" (1/3) ... [2024-11-22 21:49:20,750 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c99fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:20, skipping insertion in model container [2024-11-22 21:49:20,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:49:19" (2/3) ... [2024-11-22 21:49:20,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c99fd00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:49:20, skipping insertion in model container [2024-11-22 21:49:20,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:49:20" (3/3) ... [2024-11-22 21:49:20,752 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-11-22 21:49:20,768 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:49:20,768 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-22 21:49:20,768 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:49:20,821 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:49:20,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-22 21:49:20,887 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-22 21:49:20,887 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:49:20,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-22 21:49:20,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-22 21:49:20,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-22 21:49:20,906 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:49:20,914 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;@1705ef30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:49:20,915 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-22 21:49:20,919 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:49:20,922 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:49:20,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:49:20,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:20,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:49:20,924 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:20,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:20,931 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-11-22 21:49:20,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097882823] [2024-11-22 21:49:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:21,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:21,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097882823] [2024-11-22 21:49:21,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097882823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:21,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:21,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:49:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248730365] [2024-11-22 21:49:21,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:21,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:21,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:21,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:21,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:21,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:21,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:21,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:21,732 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-22 21:49:21,732 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-22 21:49:21,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-22 21:49:21,753 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-22 21:49:21,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-22 21:49:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-22 21:49:21,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-22 21:49:21,769 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-22 21:49:21,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-22 21:49:21,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:49:21,785 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-22 21:49:21,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-22 21:49:21,793 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-22 21:49:21,793 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-22 21:49:21,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:21,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:21,794 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:49:21,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:49:21,795 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:21,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:21,795 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-11-22 21:49:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:21,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300131380] [2024-11-22 21:49:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300131380] [2024-11-22 21:49:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300131380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303410717] [2024-11-22 21:49:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:22,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:22,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:22,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:22,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:22,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:22,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:22,408 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-22 21:49:22,408 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:49:22,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-22 21:49:22,419 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-22 21:49:22,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-22 21:49:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-22 21:49:22,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-22 21:49:22,423 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-22 21:49:22,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-22 21:49:22,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:22,427 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-22 21:49:22,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-22 21:49:22,429 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-22 21:49:22,430 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-22 21:49:22,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:22,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:22,431 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:49:22,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:49:22,432 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:22,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:22,433 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-11-22 21:49:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529941707] [2024-11-22 21:49:22,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:22,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:22,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529941707] [2024-11-22 21:49:22,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529941707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:22,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48575945] [2024-11-22 21:49:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:22,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:22,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:22,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:22,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:49:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:22,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:49:22,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:22,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:49:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:23,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:23,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48575945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:23,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:23,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:49:23,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461581937] [2024-11-22 21:49:23,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:23,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:49:23,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:23,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:49:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:49:23,227 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:23,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:23,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:23,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:23,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:23,633 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-22 21:49:23,633 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:49:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-22 21:49:23,648 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-22 21:49:23,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-22 21:49:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:49:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:49:23,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-22 21:49:23,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-22 21:49:23,650 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-22 21:49:23,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-22 21:49:23,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:23,652 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-22 21:49:23,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-22 21:49:23,653 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-22 21:49:23,653 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-22 21:49:23,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:23,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:23,654 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:49:23,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:49:23,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:23,870 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:23,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:23,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-11-22 21:49:23,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:23,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954078221] [2024-11-22 21:49:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:23,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954078221] [2024-11-22 21:49:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954078221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:23,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:23,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:49:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197675508] [2024-11-22 21:49:23,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:23,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:49:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:49:23,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:49:23,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:49:23,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:23,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:23,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:49:23,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:24,131 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-22 21:49:24,132 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:49:24,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-22 21:49:24,143 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-22 21:49:24,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-22 21:49:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:49:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:49:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-22 21:49:24,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-22 21:49:24,148 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-22 21:49:24,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-22 21:49:24,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:49:24,150 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-22 21:49:24,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-22 21:49:24,152 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-22 21:49:24,152 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-22 21:49:24,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:24,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:24,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:49:24,153 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:24,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-11-22 21:49:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527872907] [2024-11-22 21:49:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:24,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:24,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527872907] [2024-11-22 21:49:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527872907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297447590] [2024-11-22 21:49:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:24,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:24,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:49:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:24,391 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:49:24,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:24,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:49:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:24,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:24,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297447590] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:24,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-22 21:49:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225597038] [2024-11-22 21:49:24,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:24,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:49:24,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:24,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:49:24,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:49:24,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:49:24,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:24,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:49:24,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:24,862 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-11-22 21:49:24,863 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:49:24,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-11-22 21:49:24,877 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-22 21:49:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-11-22 21:49:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:49:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:49:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-22 21:49:24,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-22 21:49:24,879 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-11-22 21:49:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-11-22 21:49:24,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:24,881 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-11-22 21:49:24,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-22 21:49:24,881 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-22 21:49:24,882 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-11-22 21:49:24,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:24,882 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:24,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:49:25,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:25,084 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:25,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-11-22 21:49:25,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:25,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279970310] [2024-11-22 21:49:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279970310] [2024-11-22 21:49:25,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279970310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:25,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:25,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:49:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242568813] [2024-11-22 21:49:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:25,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:49:25,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:25,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:49:25,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:49:25,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:25,313 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-11-22 21:49:25,313 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-11-22 21:49:25,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-11-22 21:49:25,323 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-22 21:49:25,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-11-22 21:49:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-22 21:49:25,325 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-22 21:49:25,325 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-11-22 21:49:25,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-11-22 21:49:25,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:25,328 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-22 21:49:25,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-22 21:49:25,329 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-22 21:49:25,330 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-22 21:49:25,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:25,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:25,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:25,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:49:25,331 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:25,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:25,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-11-22 21:49:25,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:25,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898804487] [2024-11-22 21:49:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:25,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:25,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898804487] [2024-11-22 21:49:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898804487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404074401] [2024-11-22 21:49:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:25,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:25,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:25,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:25,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:49:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:25,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:25,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:25,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404074401] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:25,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:25,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:49:25,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531943678] [2024-11-22 21:49:25,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:25,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:49:25,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:49:25,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:49:25,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:25,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:25,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:25,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:25,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:26,017 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-11-22 21:49:26,018 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-11-22 21:49:26,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-11-22 21:49:26,032 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-22 21:49:26,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-11-22 21:49:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:49:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:49:26,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-22 21:49:26,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-22 21:49:26,034 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-11-22 21:49:26,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-11-22 21:49:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:26,038 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-11-22 21:49:26,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-22 21:49:26,039 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-22 21:49:26,041 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-11-22 21:49:26,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:26,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:26,042 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:26,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:49:26,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:26,246 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:26,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-11-22 21:49:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:26,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410838821] [2024-11-22 21:49:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410838821] [2024-11-22 21:49:26,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410838821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939370434] [2024-11-22 21:49:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:26,340 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:26,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:49:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:26,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:26,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939370434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:26,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:49:26,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734043679] [2024-11-22 21:49:26,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:26,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:49:26,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:49:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:49:26,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:26,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:26,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:26,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:26,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:27,027 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-11-22 21:49:27,027 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-11-22 21:49:27,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-11-22 21:49:27,045 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-22 21:49:27,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-11-22 21:49:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:27,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-22 21:49:27,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-22 21:49:27,046 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-11-22 21:49:27,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-11-22 21:49:27,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:27,050 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-11-22 21:49:27,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-11-22 21:49:27,051 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-22 21:49:27,051 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-11-22 21:49:27,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:27,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:27,052 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:27,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:49:27,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:27,252 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:27,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-11-22 21:49:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183734135] [2024-11-22 21:49:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:27,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:27,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183734135] [2024-11-22 21:49:27,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183734135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:27,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381439883] [2024-11-22 21:49:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:27,424 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:27,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:49:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:27,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:49:27,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:27,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:49:27,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381439883] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:27,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:49:27,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-22 21:49:27,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085027345] [2024-11-22 21:49:27,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:27,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:49:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:49:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:49:27,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:49:27,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:27,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:27,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:49:27,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:27,960 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-11-22 21:49:27,961 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-11-22 21:49:27,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-11-22 21:49:27,982 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-22 21:49:27,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-11-22 21:49:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-22 21:49:27,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-22 21:49:27,984 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-11-22 21:49:27,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-11-22 21:49:27,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:49:27,990 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-11-22 21:49:27,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-22 21:49:27,992 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-22 21:49:27,992 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-11-22 21:49:27,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:27,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:27,993 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:28,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:49:28,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:28,194 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:28,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:28,194 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-11-22 21:49:28,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:28,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714501145] [2024-11-22 21:49:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:28,207 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:49:28,207 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:28,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714501145] [2024-11-22 21:49:28,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714501145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:49:28,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:49:28,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:49:28,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893955367] [2024-11-22 21:49:28,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:28,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:49:28,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:28,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:49:28,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:49:28,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:28,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:28,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:28,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:28,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:28,863 INFO L124 PetriNetUnfolderBase]: 3212/4591 cut-off events. [2024-11-22 21:49:28,864 INFO L125 PetriNetUnfolderBase]: For 7092/7202 co-relation queries the response was YES. [2024-11-22 21:49:28,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 4591 events. 3212/4591 cut-off events. For 7092/7202 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21749 event pairs, 1290 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 10987. Up to 2994 conditions per place. [2024-11-22 21:49:28,895 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 80 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-22 21:49:28,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 619 flow [2024-11-22 21:49:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:49:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:49:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-22 21:49:28,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-22 21:49:28,897 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 117 transitions. [2024-11-22 21:49:28,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 619 flow [2024-11-22 21:49:28,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 604 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:28,906 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 261 flow [2024-11-22 21:49:28,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-11-22 21:49:28,908 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-11-22 21:49:28,908 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 261 flow [2024-11-22 21:49:28,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:28,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:28,908 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:28,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:49:28,909 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:28,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-11-22 21:49:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795027973] [2024-11-22 21:49:28,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:28,930 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:28,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:49:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795027973] [2024-11-22 21:49:29,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795027973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:29,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547545066] [2024-11-22 21:49:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:29,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:29,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:49:29,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:29,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:29,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:49:29,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:29,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:49:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:29,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:29,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547545066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:29,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:29,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-22 21:49:29,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089524697] [2024-11-22 21:49:29,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:29,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:49:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:49:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:49:29,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-22 21:49:29,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 261 flow. Second operand has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:29,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-22 21:49:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:30,693 INFO L124 PetriNetUnfolderBase]: 4406/6146 cut-off events. [2024-11-22 21:49:30,694 INFO L125 PetriNetUnfolderBase]: For 7118/7949 co-relation queries the response was YES. [2024-11-22 21:49:30,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 6146 events. 4406/6146 cut-off events. For 7118/7949 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 30451 event pairs, 650 based on Foata normal form. 578/6716 useless extension candidates. Maximal degree in co-relation 16310. Up to 1257 conditions per place. [2024-11-22 21:49:30,733 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 171 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-11-22 21:49:30,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 193 transitions, 1191 flow [2024-11-22 21:49:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:49:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:49:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-11-22 21:49:30,736 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-22 21:49:30,736 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 261 flow. Second operand 14 states and 275 transitions. [2024-11-22 21:49:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 193 transitions, 1191 flow [2024-11-22 21:49:30,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 193 transitions, 1150 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:30,747 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 319 flow [2024-11-22 21:49:30,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=319, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2024-11-22 21:49:30,748 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-11-22 21:49:30,748 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 319 flow [2024-11-22 21:49:30,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:30,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:30,749 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:30,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:30,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:30,950 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:30,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:30,950 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-11-22 21:49:30,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:30,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955503826] [2024-11-22 21:49:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:30,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:31,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955503826] [2024-11-22 21:49:31,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955503826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:31,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772706608] [2024-11-22 21:49:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:31,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:31,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:31,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:31,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:49:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:31,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:49:31,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:31,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772706608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:31,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:31,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:49:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306367310] [2024-11-22 21:49:31,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:31,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:49:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:49:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:49:31,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:31,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 319 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:31,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:31,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:31,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:31,935 INFO L124 PetriNetUnfolderBase]: 3957/5574 cut-off events. [2024-11-22 21:49:31,935 INFO L125 PetriNetUnfolderBase]: For 15114/15856 co-relation queries the response was YES. [2024-11-22 21:49:31,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 5574 events. 3957/5574 cut-off events. For 15114/15856 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26247 event pairs, 2614 based on Foata normal form. 344/5852 useless extension candidates. Maximal degree in co-relation 16522. Up to 4683 conditions per place. [2024-11-22 21:49:31,968 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 76 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-11-22 21:49:31,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 689 flow [2024-11-22 21:49:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-22 21:49:31,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3675 [2024-11-22 21:49:31,970 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 319 flow. Second operand 8 states and 147 transitions. [2024-11-22 21:49:31,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 689 flow [2024-11-22 21:49:31,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 601 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-11-22 21:49:31,981 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 320 flow [2024-11-22 21:49:31,981 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-11-22 21:49:31,982 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-11-22 21:49:31,982 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 320 flow [2024-11-22 21:49:31,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:31,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:31,982 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:31,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:32,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:32,183 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:32,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash 202087547, now seen corresponding path program 1 times [2024-11-22 21:49:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769338937] [2024-11-22 21:49:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:32,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769338937] [2024-11-22 21:49:32,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769338937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:32,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720826303] [2024-11-22 21:49:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:32,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:32,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:32,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:32,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:49:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:32,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:49:32,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:32,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720826303] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:32,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-22 21:49:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188742627] [2024-11-22 21:49:32,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:32,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:49:32,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:49:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:49:32,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:32,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 320 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:32,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:32,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:32,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:33,500 INFO L124 PetriNetUnfolderBase]: 6235/8905 cut-off events. [2024-11-22 21:49:33,500 INFO L125 PetriNetUnfolderBase]: For 15490/15788 co-relation queries the response was YES. [2024-11-22 21:49:33,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30167 conditions, 8905 events. 6235/8905 cut-off events. For 15490/15788 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 45920 event pairs, 3207 based on Foata normal form. 0/8764 useless extension candidates. Maximal degree in co-relation 16599. Up to 4783 conditions per place. [2024-11-22 21:49:33,560 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 123 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-11-22 21:49:33,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 1031 flow [2024-11-22 21:49:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:49:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:49:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-11-22 21:49:33,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-11-22 21:49:33,561 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 320 flow. Second operand 9 states and 170 transitions. [2024-11-22 21:49:33,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 1031 flow [2024-11-22 21:49:33,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 1012 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:49:33,598 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 407 flow [2024-11-22 21:49:33,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-22 21:49:33,713 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-11-22 21:49:33,713 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 407 flow [2024-11-22 21:49:33,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:33,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:33,713 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:33,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:49:33,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 21:49:33,914 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:33,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-11-22 21:49:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:33,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488489606] [2024-11-22 21:49:33,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:33,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:33,932 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:33,932 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:49:34,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:34,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488489606] [2024-11-22 21:49:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488489606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:34,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204712093] [2024-11-22 21:49:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:34,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:34,172 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:34,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:49:34,240 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:34,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:34,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:49:34,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:34,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:34,656 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 35 treesize of output 31 [2024-11-22 21:49:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:49:34,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204712093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:34,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:34,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2024-11-22 21:49:34,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376599511] [2024-11-22 21:49:34,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:34,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:49:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:34,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:49:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:49:34,885 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:34,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 407 flow. Second operand has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:34,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:34,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:34,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:35,814 INFO L124 PetriNetUnfolderBase]: 5752/8070 cut-off events. [2024-11-22 21:49:35,814 INFO L125 PetriNetUnfolderBase]: For 19661/20819 co-relation queries the response was YES. [2024-11-22 21:49:35,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29337 conditions, 8070 events. 5752/8070 cut-off events. For 19661/20819 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40436 event pairs, 1197 based on Foata normal form. 734/8795 useless extension candidates. Maximal degree in co-relation 21505. Up to 2646 conditions per place. [2024-11-22 21:49:35,887 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 128 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-11-22 21:49:35,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 148 transitions, 1222 flow [2024-11-22 21:49:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:49:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:49:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-22 21:49:35,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-11-22 21:49:35,890 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 407 flow. Second operand 7 states and 132 transitions. [2024-11-22 21:49:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 148 transitions, 1222 flow [2024-11-22 21:49:35,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 1201 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:35,926 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 434 flow [2024-11-22 21:49:35,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-11-22 21:49:35,927 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-11-22 21:49:35,927 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 434 flow [2024-11-22 21:49:35,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:35,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:35,928 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:35,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:49:36,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:49:36,129 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:36,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash 464008335, now seen corresponding path program 2 times [2024-11-22 21:49:36,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:36,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530369772] [2024-11-22 21:49:36,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:36,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:36,150 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:36,150 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:49:36,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530369772] [2024-11-22 21:49:36,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530369772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:36,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403535217] [2024-11-22 21:49:36,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:36,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:36,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:36,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:49:36,467 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:36,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:36,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 21:49:36,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:36,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:49:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:49:37,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:49:37,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403535217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:37,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:37,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:49:37,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948859644] [2024-11-22 21:49:37,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:37,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:49:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:49:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:49:37,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:37,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 434 flow. Second operand has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:37,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:37,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:37,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:38,285 INFO L124 PetriNetUnfolderBase]: 5197/7319 cut-off events. [2024-11-22 21:49:38,285 INFO L125 PetriNetUnfolderBase]: For 19867/20187 co-relation queries the response was YES. [2024-11-22 21:49:38,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28443 conditions, 7319 events. 5197/7319 cut-off events. For 19867/20187 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 36918 event pairs, 1028 based on Foata normal form. 118/7296 useless extension candidates. Maximal degree in co-relation 22137. Up to 2303 conditions per place. [2024-11-22 21:49:38,325 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2024-11-22 21:49:38,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1237 flow [2024-11-22 21:49:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-11-22 21:49:38,327 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-22 21:49:38,327 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 434 flow. Second operand 8 states and 152 transitions. [2024-11-22 21:49:38,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1237 flow [2024-11-22 21:49:38,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1144 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:38,386 INFO L231 Difference]: Finished difference. Result has 89 places, 65 transitions, 432 flow [2024-11-22 21:49:38,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=432, PETRI_PLACES=89, PETRI_TRANSITIONS=65} [2024-11-22 21:49:38,387 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-22 21:49:38,387 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 65 transitions, 432 flow [2024-11-22 21:49:38,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:38,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:38,388 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:38,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:38,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 21:49:38,588 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:38,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:38,589 INFO L85 PathProgramCache]: Analyzing trace with hash -75547197, now seen corresponding path program 1 times [2024-11-22 21:49:38,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930442294] [2024-11-22 21:49:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930442294] [2024-11-22 21:49:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930442294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476890376] [2024-11-22 21:49:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:38,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:38,661 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:38,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:49:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:38,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:49:38,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:38,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476890376] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:38,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:38,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-22 21:49:38,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979549715] [2024-11-22 21:49:38,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:38,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:49:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:38,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:49:38,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:49:38,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:38,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 65 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:38,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:38,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:38,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:39,298 INFO L124 PetriNetUnfolderBase]: 5333/7699 cut-off events. [2024-11-22 21:49:39,298 INFO L125 PetriNetUnfolderBase]: For 23408/23864 co-relation queries the response was YES. [2024-11-22 21:49:39,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29303 conditions, 7699 events. 5333/7699 cut-off events. For 23408/23864 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39583 event pairs, 1743 based on Foata normal form. 196/7704 useless extension candidates. Maximal degree in co-relation 22896. Up to 4349 conditions per place. [2024-11-22 21:49:39,339 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 76 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-22 21:49:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 782 flow [2024-11-22 21:49:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-22 21:49:39,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-22 21:49:39,340 INFO L175 Difference]: Start difference. First operand has 89 places, 65 transitions, 432 flow. Second operand 5 states and 88 transitions. [2024-11-22 21:49:39,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 782 flow [2024-11-22 21:49:39,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 91 transitions, 688 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-22 21:49:39,381 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 401 flow [2024-11-22 21:49:39,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2024-11-22 21:49:39,382 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-22 21:49:39,382 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 401 flow [2024-11-22 21:49:39,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:39,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:39,382 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:39,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:39,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:49:39,583 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:39,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1987981487, now seen corresponding path program 1 times [2024-11-22 21:49:39,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:39,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642607434] [2024-11-22 21:49:39,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:39,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642607434] [2024-11-22 21:49:39,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642607434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:39,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200759103] [2024-11-22 21:49:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:39,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:39,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:39,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:39,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:49:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:39,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-22 21:49:39,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:39,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200759103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:39,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-22 21:49:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397845498] [2024-11-22 21:49:39,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:39,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:49:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:49:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:49:39,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-22 21:49:39,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 401 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:39,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:39,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-22 21:49:39,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:40,249 INFO L124 PetriNetUnfolderBase]: 4862/7018 cut-off events. [2024-11-22 21:49:40,249 INFO L125 PetriNetUnfolderBase]: For 21142/21664 co-relation queries the response was YES. [2024-11-22 21:49:40,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25232 conditions, 7018 events. 4862/7018 cut-off events. For 21142/21664 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 37044 event pairs, 1577 based on Foata normal form. 223/7037 useless extension candidates. Maximal degree in co-relation 19959. Up to 3757 conditions per place. [2024-11-22 21:49:40,288 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 72 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2024-11-22 21:49:40,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 723 flow [2024-11-22 21:49:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:49:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:49:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-22 21:49:40,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-22 21:49:40,290 INFO L175 Difference]: Start difference. First operand has 86 places, 64 transitions, 401 flow. Second operand 4 states and 76 transitions. [2024-11-22 21:49:40,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 723 flow [2024-11-22 21:49:40,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 700 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:40,324 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 390 flow [2024-11-22 21:49:40,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2024-11-22 21:49:40,325 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-22 21:49:40,325 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 390 flow [2024-11-22 21:49:40,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:40,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:40,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:40,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:49:40,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:49:40,530 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:40,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash 263734697, now seen corresponding path program 1 times [2024-11-22 21:49:40,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:40,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255090859] [2024-11-22 21:49:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:40,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:41,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:41,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255090859] [2024-11-22 21:49:41,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255090859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:41,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351820678] [2024-11-22 21:49:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:41,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:41,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:41,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:41,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:49:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:41,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 21:49:41,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:41,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:41,576 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 85 treesize of output 61 [2024-11-22 21:49:41,579 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 61 treesize of output 57 [2024-11-22 21:49:41,583 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 57 treesize of output 53 [2024-11-22 21:49:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:41,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:42,372 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 177 treesize of output 173 [2024-11-22 21:49:42,378 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 173 treesize of output 169 [2024-11-22 21:49:43,527 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 109 treesize of output 99 [2024-11-22 21:49:43,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:43,540 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 128 treesize of output 122 [2024-11-22 21:49:43,807 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 203 treesize of output 187 [2024-11-22 21:49:43,821 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-22 21:49:43,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 1 [2024-11-22 21:49:43,830 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 229 treesize of output 205 [2024-11-22 21:49:43,845 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-22 21:49:43,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-11-22 21:49:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:43,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351820678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:43,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:43,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-22 21:49:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818278128] [2024-11-22 21:49:43,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:43,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 21:49:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:43,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 21:49:43,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-22 21:49:44,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:49:44,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 390 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:44,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:44,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:49:44,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:46,307 INFO L124 PetriNetUnfolderBase]: 3957/6037 cut-off events. [2024-11-22 21:49:46,307 INFO L125 PetriNetUnfolderBase]: For 16438/16857 co-relation queries the response was YES. [2024-11-22 21:49:46,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22235 conditions, 6037 events. 3957/6037 cut-off events. For 16438/16857 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32773 event pairs, 1063 based on Foata normal form. 1/6031 useless extension candidates. Maximal degree in co-relation 17736. Up to 4978 conditions per place. [2024-11-22 21:49:46,336 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 81 selfloop transitions, 18 changer transitions 47/155 dead transitions. [2024-11-22 21:49:46,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 155 transitions, 1185 flow [2024-11-22 21:49:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:49:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:49:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-22 21:49:46,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-22 21:49:46,338 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 390 flow. Second operand 16 states and 284 transitions. [2024-11-22 21:49:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 155 transitions, 1185 flow [2024-11-22 21:49:46,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 1155 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:46,394 INFO L231 Difference]: Finished difference. Result has 107 places, 72 transitions, 490 flow [2024-11-22 21:49:46,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=490, PETRI_PLACES=107, PETRI_TRANSITIONS=72} [2024-11-22 21:49:46,394 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-11-22 21:49:46,394 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 72 transitions, 490 flow [2024-11-22 21:49:46,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:46,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:46,395 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:46,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:49:46,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:49:46,599 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:49:46,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -510558381, now seen corresponding path program 2 times [2024-11-22 21:49:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145836741] [2024-11-22 21:49:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:46,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:46,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:47,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:47,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145836741] [2024-11-22 21:49:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145836741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:47,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829643525] [2024-11-22 21:49:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:47,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:47,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:47,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:47,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:49:47,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:47,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:47,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 21:49:47,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:47,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:47,595 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 75 treesize of output 51 [2024-11-22 21:49:47,597 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 51 treesize of output 47 [2024-11-22 21:49:47,599 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 47 treesize of output 43 [2024-11-22 21:49:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:47,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:47,981 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 177 treesize of output 173 [2024-11-22 21:49:47,985 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 173 treesize of output 169 [2024-11-22 21:49:49,511 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 246 treesize of output 228 [2024-11-22 21:49:49,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:49,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 311 [2024-11-22 21:50:21,333 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 294 treesize of output 264 [2024-11-22 21:50:21,354 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-11-22 21:50:21,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2024-11-22 21:50:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:21,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829643525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:21,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:21,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-22 21:50:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987321358] [2024-11-22 21:50:21,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:21,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:50:21,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:21,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:50:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:50:21,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:50:21,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 72 transitions, 490 flow. Second operand has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:21,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:21,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:50:21,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:24,426 INFO L124 PetriNetUnfolderBase]: 4170/6453 cut-off events. [2024-11-22 21:50:24,426 INFO L125 PetriNetUnfolderBase]: For 19091/19487 co-relation queries the response was YES. [2024-11-22 21:50:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24558 conditions, 6453 events. 4170/6453 cut-off events. For 19091/19487 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 36596 event pairs, 1216 based on Foata normal form. 11/6453 useless extension candidates. Maximal degree in co-relation 24516. Up to 5130 conditions per place. [2024-11-22 21:50:24,462 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 116 selfloop transitions, 72 changer transitions 38/235 dead transitions. [2024-11-22 21:50:24,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 235 transitions, 1965 flow [2024-11-22 21:50:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-22 21:50:24,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-22 21:50:24,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 512 transitions. [2024-11-22 21:50:24,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-22 21:50:24,464 INFO L175 Difference]: Start difference. First operand has 107 places, 72 transitions, 490 flow. Second operand 32 states and 512 transitions. [2024-11-22 21:50:24,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 235 transitions, 1965 flow [2024-11-22 21:50:24,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 1906 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-22 21:50:24,498 INFO L231 Difference]: Finished difference. Result has 141 places, 128 transitions, 1158 flow [2024-11-22 21:50:24,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1158, PETRI_PLACES=141, PETRI_TRANSITIONS=128} [2024-11-22 21:50:24,498 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 89 predicate places. [2024-11-22 21:50:24,499 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 128 transitions, 1158 flow [2024-11-22 21:50:24,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:24,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:24,499 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:24,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:50:24,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:24,700 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:24,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 134319799, now seen corresponding path program 3 times [2024-11-22 21:50:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:24,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664782810] [2024-11-22 21:50:24,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:24,723 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:50:24,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:50:25,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:25,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664782810] [2024-11-22 21:50:25,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664782810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:25,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754225595] [2024-11-22 21:50:25,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:25,167 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:25,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:50:25,231 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:50:25,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:25,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 21:50:25,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:25,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:50:25,525 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 75 treesize of output 51 [2024-11-22 21:50:25,527 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 51 treesize of output 47 [2024-11-22 21:50:25,529 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 47 treesize of output 43 [2024-11-22 21:50:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:25,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:25,808 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 177 treesize of output 173 [2024-11-22 21:50:25,810 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 173 treesize of output 169 [2024-11-22 21:50:27,288 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 109 treesize of output 99 [2024-11-22 21:50:27,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:27,300 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 128 treesize of output 122 [2024-11-22 21:50:27,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 205 [2024-11-22 21:50:27,595 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-22 21:50:27,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-11-22 21:50:27,601 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 203 treesize of output 187 [2024-11-22 21:50:27,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:27,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 239 [2024-11-22 21:50:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754225595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:29,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:29,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-11-22 21:50:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21182838] [2024-11-22 21:50:29,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:29,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:50:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:29,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:50:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:50:30,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-22 21:50:30,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 128 transitions, 1158 flow. Second operand has 25 states, 25 states have (on average 12.88) internal successors, (322), 25 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:30,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:30,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-22 21:50:30,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:32,888 INFO L124 PetriNetUnfolderBase]: 4323/6770 cut-off events. [2024-11-22 21:50:32,889 INFO L125 PetriNetUnfolderBase]: For 30071/30493 co-relation queries the response was YES. [2024-11-22 21:50:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29463 conditions, 6770 events. 4323/6770 cut-off events. For 30071/30493 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 39577 event pairs, 1145 based on Foata normal form. 3/6770 useless extension candidates. Maximal degree in co-relation 29400. Up to 5332 conditions per place. [2024-11-22 21:50:32,933 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 166 selfloop transitions, 79 changer transitions 41/295 dead transitions. [2024-11-22 21:50:32,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 295 transitions, 2999 flow [2024-11-22 21:50:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-22 21:50:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-22 21:50:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 526 transitions. [2024-11-22 21:50:32,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32875 [2024-11-22 21:50:32,935 INFO L175 Difference]: Start difference. First operand has 141 places, 128 transitions, 1158 flow. Second operand 32 states and 526 transitions. [2024-11-22 21:50:32,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 295 transitions, 2999 flow [2024-11-22 21:50:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 295 transitions, 2848 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-11-22 21:50:32,989 INFO L231 Difference]: Finished difference. Result has 170 places, 169 transitions, 1747 flow [2024-11-22 21:50:32,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1747, PETRI_PLACES=170, PETRI_TRANSITIONS=169} [2024-11-22 21:50:32,990 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-11-22 21:50:32,990 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 169 transitions, 1747 flow [2024-11-22 21:50:32,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.88) internal successors, (322), 25 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:32,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:32,991 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:32,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 21:50:33,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:33,192 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:33,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash -735049199, now seen corresponding path program 4 times [2024-11-22 21:50:33,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:33,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34720487] [2024-11-22 21:50:33,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:33,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:33,225 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:33,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34720487] [2024-11-22 21:50:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34720487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708774730] [2024-11-22 21:50:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:33,758 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:33,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:50:33,832 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:33,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:33,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 21:50:33,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:33,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:50:34,190 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 75 treesize of output 51 [2024-11-22 21:50:34,196 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 51 treesize of output 47 [2024-11-22 21:50:34,200 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 47 treesize of output 43 [2024-11-22 21:50:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:34,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:34,553 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 169 treesize of output 165 [2024-11-22 21:50:34,556 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 165 treesize of output 161 [2024-11-22 21:50:36,041 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 294 treesize of output 264 [2024-11-22 21:50:36,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:50:36,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 389