./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-nzb-file-symm.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/chl-nzb-file-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:43:19,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:43:19,573 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:43:19,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:43:19,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:43:19,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:43:19,599 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:43:19,599 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:43:19,600 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:43:19,601 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:43:19,601 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:43:19,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:43:19,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:43:19,602 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:43:19,602 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:43:19,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:43:19,603 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:43:19,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:43:19,603 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:43:19,603 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:43:19,604 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:43:19,604 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:43:19,604 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:43:19,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:43:19,605 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:43:19,605 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:43:19,605 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:43:19,605 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:43:19,606 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:43:19,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:43:19,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:43:19,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:43:19,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:43:19,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:43:19,607 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:43:19,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:43:19,607 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:43:19,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:43:19,608 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:43:19,608 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:43:19,608 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:43:19,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:43:19,609 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-22 21:43:19,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:43:19,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:43:19,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:43:19,889 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:43:19,889 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:43:19,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-22 21:43:21,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:43:21,419 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:43:21,423 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-22 21:43:21,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e925ca6/81e12b5e79434e079fbde3676395e0c6/FLAGf62c6ec70 [2024-11-22 21:43:21,457 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e925ca6/81e12b5e79434e079fbde3676395e0c6 [2024-11-22 21:43:21,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:43:21,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:43:21,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:43:21,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:43:21,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:43:21,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,468 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62595e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21, skipping insertion in model container [2024-11-22 21:43:21,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:43:21,658 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 21:43:21,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:43:21,668 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:43:21,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:43:21,706 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:43:21,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21 WrapperNode [2024-11-22 21:43:21,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:43:21,708 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:43:21,708 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:43:21,708 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:43:21,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,764 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 22, calls inlined = 30, statements flattened = 409 [2024-11-22 21:43:21,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:43:21,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:43:21,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:43:21,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:43:21,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,787 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,813 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:43:21,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,828 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,829 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,832 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:43:21,833 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:43:21,833 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:43:21,833 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:43:21,834 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (1/1) ... [2024-11-22 21:43:21,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:43:21,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:21,877 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 21:43:21,887 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 21:43:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:43:21,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:43:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:43:21,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:43:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:43:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:43:21,934 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 21:43:22,080 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:43:22,082 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:43:22,662 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:43:22,663 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:43:23,061 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:43:23,062 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:43:23,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:43:23 BoogieIcfgContainer [2024-11-22 21:43:23,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:43:23,064 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:43:23,064 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:43:23,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:43:23,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:43:21" (1/3) ... [2024-11-22 21:43:23,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cca20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:43:23, skipping insertion in model container [2024-11-22 21:43:23,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:43:21" (2/3) ... [2024-11-22 21:43:23,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75cca20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:43:23, skipping insertion in model container [2024-11-22 21:43:23,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:43:23" (3/3) ... [2024-11-22 21:43:23,068 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-22 21:43:23,081 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:43:23,081 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-11-22 21:43:23,081 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:43:23,191 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:43:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 126 transitions, 266 flow [2024-11-22 21:43:23,321 INFO L124 PetriNetUnfolderBase]: 20/124 cut-off events. [2024-11-22 21:43:23,321 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:43:23,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 124 events. 20/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 391 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2024-11-22 21:43:23,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 126 transitions, 266 flow [2024-11-22 21:43:23,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 123 transitions, 258 flow [2024-11-22 21:43:23,340 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:43:23,345 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;@20388254, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:43:23,345 INFO L334 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2024-11-22 21:43:23,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:43:23,348 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:43:23,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:43:23,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:23,348 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:43:23,349 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:23,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1300439, now seen corresponding path program 1 times [2024-11-22 21:43:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726730960] [2024-11-22 21:43:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:23,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:23,596 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 21:43:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726730960] [2024-11-22 21:43:23,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726730960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:23,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:23,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:43:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344407785] [2024-11-22 21:43:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:23,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:43:23,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:43:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:43:23,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-22 21:43:23,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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 21:43:23,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:23,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-22 21:43:23,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:24,124 INFO L124 PetriNetUnfolderBase]: 1446/3461 cut-off events. [2024-11-22 21:43:24,125 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-22 21:43:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5601 conditions, 3461 events. 1446/3461 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25244 event pairs, 790 based on Foata normal form. 1/2625 useless extension candidates. Maximal degree in co-relation 5456. Up to 2083 conditions per place. [2024-11-22 21:43:24,146 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 56 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2024-11-22 21:43:24,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 117 transitions, 362 flow [2024-11-22 21:43:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-22 21:43:24,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-11-22 21:43:24,161 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 258 flow. Second operand 3 states and 249 transitions. [2024-11-22 21:43:24,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 117 transitions, 362 flow [2024-11-22 21:43:24,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 117 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:43:24,170 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 242 flow [2024-11-22 21:43:24,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-11-22 21:43:24,174 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-22 21:43:24,175 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 242 flow [2024-11-22 21:43:24,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 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 21:43:24,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:24,176 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:43:24,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:43:24,177 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:24,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1300440, now seen corresponding path program 1 times [2024-11-22 21:43:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:24,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016158128] [2024-11-22 21:43:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:24,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:24,383 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 21:43:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016158128] [2024-11-22 21:43:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016158128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:24,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:24,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:43:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189644832] [2024-11-22 21:43:24,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:24,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:24,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:24,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-22 21:43:24,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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 21:43:24,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:24,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-22 21:43:24,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:24,818 INFO L124 PetriNetUnfolderBase]: 1446/3465 cut-off events. [2024-11-22 21:43:24,818 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-22 21:43:24,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5580 conditions, 3465 events. 1446/3465 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 25213 event pairs, 790 based on Foata normal form. 1/2628 useless extension candidates. Maximal degree in co-relation 5549. Up to 2091 conditions per place. [2024-11-22 21:43:24,837 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 60 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-11-22 21:43:24,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 121 transitions, 378 flow [2024-11-22 21:43:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2024-11-22 21:43:24,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-11-22 21:43:24,839 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 242 flow. Second operand 3 states and 254 transitions. [2024-11-22 21:43:24,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 121 transitions, 378 flow [2024-11-22 21:43:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:24,845 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 264 flow [2024-11-22 21:43:24,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-11-22 21:43:24,846 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -5 predicate places. [2024-11-22 21:43:24,846 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 264 flow [2024-11-22 21:43:24,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.75) internal successors, (251), 4 states have internal predecessors, (251), 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 21:43:24,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:24,847 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:43:24,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:43:24,848 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:24,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1249764370, now seen corresponding path program 1 times [2024-11-22 21:43:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039485259] [2024-11-22 21:43:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:25,185 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 21:43:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039485259] [2024-11-22 21:43:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039485259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587326005] [2024-11-22 21:43:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:25,193 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 21:43:25,195 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 21:43:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:25,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:43:25,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:25,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:43:25,371 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 21:43:25,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:25,431 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 21:43:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587326005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:25,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-22 21:43:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588715058] [2024-11-22 21:43:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:25,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:43:25,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:43:25,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:43:25,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-22 21:43:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 264 flow. Second operand has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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 21:43:25,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:25,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-22 21:43:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:26,047 INFO L124 PetriNetUnfolderBase]: 1452/3483 cut-off events. [2024-11-22 21:43:26,048 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-11-22 21:43:26,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5638 conditions, 3483 events. 1452/3483 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25257 event pairs, 790 based on Foata normal form. 0/2646 useless extension candidates. Maximal degree in co-relation 5584. Up to 2094 conditions per place. [2024-11-22 21:43:26,065 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 66 selfloop transitions, 16 changer transitions 0/139 dead transitions. [2024-11-22 21:43:26,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 139 transitions, 495 flow [2024-11-22 21:43:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:43:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:43:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 460 transitions. [2024-11-22 21:43:26,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-11-22 21:43:26,069 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 264 flow. Second operand 6 states and 460 transitions. [2024-11-22 21:43:26,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 139 transitions, 495 flow [2024-11-22 21:43:26,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 139 transitions, 488 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:43:26,071 INFO L231 Difference]: Finished difference. Result has 112 places, 131 transitions, 376 flow [2024-11-22 21:43:26,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=112, PETRI_TRANSITIONS=131} [2024-11-22 21:43:26,072 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 2 predicate places. [2024-11-22 21:43:26,073 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 131 transitions, 376 flow [2024-11-22 21:43:26,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 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 21:43:26,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:26,073 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-22 21:43:26,081 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 21:43:26,277 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 21:43:26,278 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:26,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1847960000, now seen corresponding path program 2 times [2024-11-22 21:43:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:26,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909932740] [2024-11-22 21:43:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:26,307 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:26,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:26,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909932740] [2024-11-22 21:43:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909932740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771069881] [2024-11-22 21:43:26,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:26,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:26,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:26,664 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 21:43:26,665 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 21:43:26,734 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:43:26,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:26,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:43:26,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:26,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:43:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:26,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771069881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:27,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:27,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-22 21:43:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557440394] [2024-11-22 21:43:27,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:27,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:43:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:43:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:43:28,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 126 [2024-11-22 21:43:28,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 131 transitions, 376 flow. Second operand has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 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 21:43:28,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:28,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 126 [2024-11-22 21:43:28,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:28,767 INFO L124 PetriNetUnfolderBase]: 1454/3487 cut-off events. [2024-11-22 21:43:28,768 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-22 21:43:28,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5684 conditions, 3487 events. 1454/3487 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25304 event pairs, 790 based on Foata normal form. 4/2656 useless extension candidates. Maximal degree in co-relation 5603. Up to 2087 conditions per place. [2024-11-22 21:43:28,789 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 61 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-11-22 21:43:28,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 572 flow [2024-11-22 21:43:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:43:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:43:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-22 21:43:28,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-22 21:43:28,791 INFO L175 Difference]: Start difference. First operand has 112 places, 131 transitions, 376 flow. Second operand 9 states and 648 transitions. [2024-11-22 21:43:28,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 572 flow [2024-11-22 21:43:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 143 transitions, 508 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-22 21:43:28,795 INFO L231 Difference]: Finished difference. Result has 114 places, 135 transitions, 382 flow [2024-11-22 21:43:28,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=114, PETRI_TRANSITIONS=135} [2024-11-22 21:43:28,796 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-22 21:43:28,796 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 135 transitions, 382 flow [2024-11-22 21:43:28,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 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 21:43:28,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:28,797 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:28,808 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 21:43:28,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-22 21:43:28,998 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:28,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 989591744, now seen corresponding path program 1 times [2024-11-22 21:43:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:28,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606552386] [2024-11-22 21:43:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:28,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:29,065 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 21:43:29,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:29,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606552386] [2024-11-22 21:43:29,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606552386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:29,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821981549] [2024-11-22 21:43:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:29,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:29,069 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 21:43:29,076 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 21:43:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:29,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 21:43:29,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:29,171 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 21:43:29,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:29,187 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 21:43:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821981549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:29,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 21:43:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027835784] [2024-11-22 21:43:29,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:29,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:43:29,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:43:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:43:29,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:29,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 135 transitions, 382 flow. Second operand has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 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 21:43:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:29,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:29,701 INFO L124 PetriNetUnfolderBase]: 1448/3481 cut-off events. [2024-11-22 21:43:29,701 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-22 21:43:29,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5662 conditions, 3481 events. 1448/3481 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25175 event pairs, 790 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 5557. Up to 2090 conditions per place. [2024-11-22 21:43:29,750 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 61 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-22 21:43:29,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 137 transitions, 538 flow [2024-11-22 21:43:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:43:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:43:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 462 transitions. [2024-11-22 21:43:29,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-22 21:43:29,759 INFO L175 Difference]: Start difference. First operand has 114 places, 135 transitions, 382 flow. Second operand 6 states and 462 transitions. [2024-11-22 21:43:29,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 137 transitions, 538 flow [2024-11-22 21:43:29,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 137 transitions, 501 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:29,763 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 372 flow [2024-11-22 21:43:29,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-11-22 21:43:29,768 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-22 21:43:29,768 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 372 flow [2024-11-22 21:43:29,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.5) internal successors, (532), 8 states have internal predecessors, (532), 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 21:43:29,769 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:29,769 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:29,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:43:29,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:29,971 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:29,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:29,974 INFO L85 PathProgramCache]: Analyzing trace with hash 610411437, now seen corresponding path program 2 times [2024-11-22 21:43:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964353926] [2024-11-22 21:43:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:29,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:30,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:43:30,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-22 21:43:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:30,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964353926] [2024-11-22 21:43:30,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964353926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:30,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:30,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232384861] [2024-11-22 21:43:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:30,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:43:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:43:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:43:30,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 126 [2024-11-22 21:43:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 21:43:30,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 126 [2024-11-22 21:43:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:31,215 INFO L124 PetriNetUnfolderBase]: 3173/6790 cut-off events. [2024-11-22 21:43:31,216 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-22 21:43:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 6790 events. 3173/6790 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 48080 event pairs, 1228 based on Foata normal form. 0/5448 useless extension candidates. Maximal degree in co-relation 11429. Up to 2561 conditions per place. [2024-11-22 21:43:31,239 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 118 selfloop transitions, 7 changer transitions 0/178 dead transitions. [2024-11-22 21:43:31,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 178 transitions, 719 flow [2024-11-22 21:43:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:43:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:43:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2024-11-22 21:43:31,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097883597883598 [2024-11-22 21:43:31,241 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 372 flow. Second operand 6 states and 461 transitions. [2024-11-22 21:43:31,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 178 transitions, 719 flow [2024-11-22 21:43:31,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 178 transitions, 702 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:31,244 INFO L231 Difference]: Finished difference. Result has 117 places, 132 transitions, 383 flow [2024-11-22 21:43:31,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=117, PETRI_TRANSITIONS=132} [2024-11-22 21:43:31,246 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 7 predicate places. [2024-11-22 21:43:31,246 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 132 transitions, 383 flow [2024-11-22 21:43:31,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 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 21:43:31,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:31,247 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:31,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:43:31,247 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:31,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 610411436, now seen corresponding path program 1 times [2024-11-22 21:43:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313691533] [2024-11-22 21:43:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:43:31,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313691533] [2024-11-22 21:43:31,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313691533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:31,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854898220] [2024-11-22 21:43:31,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:31,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:31,384 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 21:43:31,385 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 21:43:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:31,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:43:31,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:43:31,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:43:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854898220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:31,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:31,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 21:43:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521231215] [2024-11-22 21:43:31,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:31,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:43:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:43:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:43:31,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:31,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 132 transitions, 383 flow. Second operand has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 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 21:43:31,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:31,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:31,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:32,172 INFO L124 PetriNetUnfolderBase]: 2758/6505 cut-off events. [2024-11-22 21:43:32,172 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-11-22 21:43:32,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10886 conditions, 6505 events. 2758/6505 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 49163 event pairs, 1536 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 10779. Up to 3986 conditions per place. [2024-11-22 21:43:32,194 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 63 selfloop transitions, 16 changer transitions 0/136 dead transitions. [2024-11-22 21:43:32,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 136 transitions, 552 flow [2024-11-22 21:43:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:43:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:43:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 592 transitions. [2024-11-22 21:43:32,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-11-22 21:43:32,196 INFO L175 Difference]: Start difference. First operand has 117 places, 132 transitions, 383 flow. Second operand 8 states and 592 transitions. [2024-11-22 21:43:32,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 136 transitions, 552 flow [2024-11-22 21:43:32,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 136 transitions, 544 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:43:32,199 INFO L231 Difference]: Finished difference. Result has 120 places, 130 transitions, 394 flow [2024-11-22 21:43:32,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=120, PETRI_TRANSITIONS=130} [2024-11-22 21:43:32,200 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 10 predicate places. [2024-11-22 21:43:32,200 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 130 transitions, 394 flow [2024-11-22 21:43:32,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 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 21:43:32,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:32,201 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:32,208 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 21:43:32,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:32,406 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:32,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:32,406 INFO L85 PathProgramCache]: Analyzing trace with hash -820950917, now seen corresponding path program 2 times [2024-11-22 21:43:32,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:32,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956914242] [2024-11-22 21:43:32,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:32,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:32,428 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:43:32,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:32,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:32,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956914242] [2024-11-22 21:43:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956914242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:43:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320428127] [2024-11-22 21:43:32,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:32,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:32,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-22 21:43:32,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 130 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:32,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:32,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-22 21:43:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:33,090 INFO L124 PetriNetUnfolderBase]: 2758/6143 cut-off events. [2024-11-22 21:43:33,091 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-22 21:43:33,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10481 conditions, 6143 events. 2758/6143 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 43884 event pairs, 1536 based on Foata normal form. 0/5000 useless extension candidates. Maximal degree in co-relation 10360. Up to 3981 conditions per place. [2024-11-22 21:43:33,119 INFO L140 encePairwiseOnDemand]: 115/126 looper letters, 70 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-22 21:43:33,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 122 transitions, 524 flow [2024-11-22 21:43:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:43:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:43:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2024-11-22 21:43:33,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-22 21:43:33,120 INFO L175 Difference]: Start difference. First operand has 120 places, 130 transitions, 394 flow. Second operand 5 states and 336 transitions. [2024-11-22 21:43:33,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 122 transitions, 524 flow [2024-11-22 21:43:33,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 122 transitions, 492 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-22 21:43:33,123 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 352 flow [2024-11-22 21:43:33,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=352, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-11-22 21:43:33,123 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -1 predicate places. [2024-11-22 21:43:33,124 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 352 flow [2024-11-22 21:43:33,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:43:33,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:33,124 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:33,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:43:33,124 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:33,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash 612564799, now seen corresponding path program 1 times [2024-11-22 21:43:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:33,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585194214] [2024-11-22 21:43:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:33,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:43:33,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585194214] [2024-11-22 21:43:33,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585194214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:33,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198590012] [2024-11-22 21:43:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:33,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:33,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:33,465 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 21:43:33,470 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 21:43:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:33,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:43:33,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:43:33,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:33,788 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 20 treesize of output 16 [2024-11-22 21:43:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:43:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198590012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:33,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:33,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-22 21:43:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901865136] [2024-11-22 21:43:33,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:33,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:43:33,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:43:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:43:34,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-22 21:43:34,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 352 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 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 21:43:34,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:34,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-22 21:43:34,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:36,507 INFO L124 PetriNetUnfolderBase]: 6337/12780 cut-off events. [2024-11-22 21:43:36,508 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2024-11-22 21:43:36,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22578 conditions, 12780 events. 6337/12780 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 93671 event pairs, 1161 based on Foata normal form. 0/11150 useless extension candidates. Maximal degree in co-relation 22471. Up to 3752 conditions per place. [2024-11-22 21:43:36,555 INFO L140 encePairwiseOnDemand]: 114/126 looper letters, 144 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-11-22 21:43:36,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 204 transitions, 862 flow [2024-11-22 21:43:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:43:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:43:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 760 transitions. [2024-11-22 21:43:36,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-22 21:43:36,559 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 352 flow. Second operand 10 states and 760 transitions. [2024-11-22 21:43:36,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 204 transitions, 862 flow [2024-11-22 21:43:36,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 857 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:36,562 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 390 flow [2024-11-22 21:43:36,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-22 21:43:36,563 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 5 predicate places. [2024-11-22 21:43:36,563 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 390 flow [2024-11-22 21:43:36,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 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 21:43:36,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:36,563 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:36,574 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 21:43:36,767 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 21:43:36,768 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:36,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 612564798, now seen corresponding path program 1 times [2024-11-22 21:43:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839847470] [2024-11-22 21:43:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-22 21:43:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839847470] [2024-11-22 21:43:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839847470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:36,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:36,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220181460] [2024-11-22 21:43:36,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:36,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:36,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:36,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 126 [2024-11-22 21:43:36,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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 21:43:36,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:36,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 126 [2024-11-22 21:43:36,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:38,056 INFO L124 PetriNetUnfolderBase]: 6201/11906 cut-off events. [2024-11-22 21:43:38,056 INFO L125 PetriNetUnfolderBase]: For 1271/1291 co-relation queries the response was YES. [2024-11-22 21:43:38,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22510 conditions, 11906 events. 6201/11906 cut-off events. For 1271/1291 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 81826 event pairs, 3811 based on Foata normal form. 224/10730 useless extension candidates. Maximal degree in co-relation 22392. Up to 9068 conditions per place. [2024-11-22 21:43:38,100 INFO L140 encePairwiseOnDemand]: 116/126 looper letters, 73 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-22 21:43:38,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 113 transitions, 524 flow [2024-11-22 21:43:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:38,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 282 transitions. [2024-11-22 21:43:38,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-11-22 21:43:38,103 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 390 flow. Second operand 4 states and 282 transitions. [2024-11-22 21:43:38,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 113 transitions, 524 flow [2024-11-22 21:43:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 503 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:43:38,107 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 357 flow [2024-11-22 21:43:38,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=357, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2024-11-22 21:43:38,108 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, -6 predicate places. [2024-11-22 21:43:38,108 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 357 flow [2024-11-22 21:43:38,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 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 21:43:38,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:38,108 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:38,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:43:38,109 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:38,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1340197152, now seen corresponding path program 1 times [2024-11-22 21:43:38,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:38,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963167336] [2024-11-22 21:43:38,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:43:38,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963167336] [2024-11-22 21:43:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963167336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:38,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305005173] [2024-11-22 21:43:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:38,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:38,542 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 21:43:38,543 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 21:43:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:38,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:43:38,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:43:38,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:38,853 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 20 treesize of output 16 [2024-11-22 21:43:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:43:38,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305005173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:43:38,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:43:38,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-22 21:43:38,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042682421] [2024-11-22 21:43:38,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:43:38,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:43:38,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:43:38,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:43:39,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-22 21:43:39,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 357 flow. Second operand has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 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 21:43:39,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:39,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-22 21:43:39,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:41,674 INFO L124 PetriNetUnfolderBase]: 9460/18103 cut-off events. [2024-11-22 21:43:41,675 INFO L125 PetriNetUnfolderBase]: For 2107/2185 co-relation queries the response was YES. [2024-11-22 21:43:41,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34549 conditions, 18103 events. 9460/18103 cut-off events. For 2107/2185 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 129804 event pairs, 2682 based on Foata normal form. 0/15485 useless extension candidates. Maximal degree in co-relation 34440. Up to 5035 conditions per place. [2024-11-22 21:43:41,754 INFO L140 encePairwiseOnDemand]: 111/126 looper letters, 164 selfloop transitions, 18 changer transitions 0/216 dead transitions. [2024-11-22 21:43:41,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 983 flow [2024-11-22 21:43:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:43:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:43:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 780 transitions. [2024-11-22 21:43:41,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-22 21:43:41,756 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 357 flow. Second operand 10 states and 780 transitions. [2024-11-22 21:43:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 983 flow [2024-11-22 21:43:41,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 216 transitions, 980 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:41,762 INFO L231 Difference]: Finished difference. Result has 114 places, 118 transitions, 443 flow [2024-11-22 21:43:41,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=443, PETRI_PLACES=114, PETRI_TRANSITIONS=118} [2024-11-22 21:43:41,763 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-22 21:43:41,763 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 118 transitions, 443 flow [2024-11-22 21:43:41,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.45454545454545) internal successors, (1374), 22 states have internal predecessors, (1374), 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 21:43:41,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:41,764 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:41,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:43:41,967 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 21:43:41,968 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:41,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 264298883, now seen corresponding path program 1 times [2024-11-22 21:43:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:41,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071158273] [2024-11-22 21:43:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-22 21:43:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:42,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071158273] [2024-11-22 21:43:42,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071158273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:42,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736646625] [2024-11-22 21:43:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:42,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:43:42,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:43:42,274 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 21:43:42,279 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 21:43:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:42,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-22 21:43:42,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:43:42,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:43:42,523 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:43:42,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-22 21:43:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:43:42,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:43:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-22 21:43:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736646625] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:43:43,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:43:43,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 14] total 27 [2024-11-22 21:43:43,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636096824] [2024-11-22 21:43:43,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:43,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:43:43,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:43:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2024-11-22 21:43:43,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-22 21:43:43,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 118 transitions, 443 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 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 21:43:43,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:43,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-22 21:43:43,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:45,482 INFO L124 PetriNetUnfolderBase]: 11439/20901 cut-off events. [2024-11-22 21:43:45,482 INFO L125 PetriNetUnfolderBase]: For 6522/6892 co-relation queries the response was YES. [2024-11-22 21:43:45,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42476 conditions, 20901 events. 11439/20901 cut-off events. For 6522/6892 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 148162 event pairs, 4244 based on Foata normal form. 0/17845 useless extension candidates. Maximal degree in co-relation 42355. Up to 8345 conditions per place. [2024-11-22 21:43:45,719 INFO L140 encePairwiseOnDemand]: 113/126 looper letters, 125 selfloop transitions, 10 changer transitions 0/169 dead transitions. [2024-11-22 21:43:45,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 869 flow [2024-11-22 21:43:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:43:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:43:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2024-11-22 21:43:45,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-11-22 21:43:45,729 INFO L175 Difference]: Start difference. First operand has 114 places, 118 transitions, 443 flow. Second operand 6 states and 471 transitions. [2024-11-22 21:43:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 869 flow [2024-11-22 21:43:45,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 169 transitions, 844 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-22 21:43:45,737 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 487 flow [2024-11-22 21:43:45,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-11-22 21:43:45,739 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 4 predicate places. [2024-11-22 21:43:45,739 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 487 flow [2024-11-22 21:43:45,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 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 21:43:45,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:45,740 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:45,747 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 21:43:45,944 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 21:43:45,945 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:45,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash 996480192, now seen corresponding path program 1 times [2024-11-22 21:43:45,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:45,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362674824] [2024-11-22 21:43:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:45,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362674824] [2024-11-22 21:43:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362674824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:46,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:46,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:43:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219268578] [2024-11-22 21:43:46,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:46,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:46,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:46,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:46,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 21:43:46,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:46,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:46,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:48,680 INFO L124 PetriNetUnfolderBase]: 11074/20733 cut-off events. [2024-11-22 21:43:48,681 INFO L125 PetriNetUnfolderBase]: For 10685/11047 co-relation queries the response was YES. [2024-11-22 21:43:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44806 conditions, 20733 events. 11074/20733 cut-off events. For 10685/11047 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 149486 event pairs, 6581 based on Foata normal form. 1/18208 useless extension candidates. Maximal degree in co-relation 44691. Up to 15449 conditions per place. [2024-11-22 21:43:48,767 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 119 selfloop transitions, 1 changer transitions 6/164 dead transitions. [2024-11-22 21:43:48,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 164 transitions, 886 flow [2024-11-22 21:43:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:48,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2024-11-22 21:43:48,769 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6924603174603174 [2024-11-22 21:43:48,769 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 487 flow. Second operand 4 states and 349 transitions. [2024-11-22 21:43:48,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 164 transitions, 886 flow [2024-11-22 21:43:48,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 164 transitions, 881 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:43:48,778 INFO L231 Difference]: Finished difference. Result has 116 places, 123 transitions, 489 flow [2024-11-22 21:43:48,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=489, PETRI_PLACES=116, PETRI_TRANSITIONS=123} [2024-11-22 21:43:48,778 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 6 predicate places. [2024-11-22 21:43:48,779 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 123 transitions, 489 flow [2024-11-22 21:43:48,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 21:43:48,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:48,779 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:48,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:43:48,779 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:48,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:48,780 INFO L85 PathProgramCache]: Analyzing trace with hash -635832396, now seen corresponding path program 2 times [2024-11-22 21:43:48,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:48,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038052832] [2024-11-22 21:43:48,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:43:48,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:48,813 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:43:48,817 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:43:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038052832] [2024-11-22 21:43:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038052832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:43:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131833725] [2024-11-22 21:43:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:49,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:43:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:43:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:43:49,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 123 transitions, 489 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 21:43:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:53,069 INFO L124 PetriNetUnfolderBase]: 20178/37087 cut-off events. [2024-11-22 21:43:53,069 INFO L125 PetriNetUnfolderBase]: For 19688/20489 co-relation queries the response was YES. [2024-11-22 21:43:53,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 37087 events. 20178/37087 cut-off events. For 19688/20489 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 292261 event pairs, 5702 based on Foata normal form. 1/33012 useless extension candidates. Maximal degree in co-relation 81262. Up to 15481 conditions per place. [2024-11-22 21:43:53,333 INFO L140 encePairwiseOnDemand]: 117/126 looper letters, 147 selfloop transitions, 10 changer transitions 2/197 dead transitions. [2024-11-22 21:43:53,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 197 transitions, 1073 flow [2024-11-22 21:43:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:43:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:43:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2024-11-22 21:43:53,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.748015873015873 [2024-11-22 21:43:53,336 INFO L175 Difference]: Start difference. First operand has 116 places, 123 transitions, 489 flow. Second operand 4 states and 377 transitions. [2024-11-22 21:43:53,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 197 transitions, 1073 flow [2024-11-22 21:43:53,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 197 transitions, 1067 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 21:43:53,356 INFO L231 Difference]: Finished difference. Result has 119 places, 133 transitions, 581 flow [2024-11-22 21:43:53,356 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=581, PETRI_PLACES=119, PETRI_TRANSITIONS=133} [2024-11-22 21:43:53,357 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 9 predicate places. [2024-11-22 21:43:53,357 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 133 transitions, 581 flow [2024-11-22 21:43:53,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 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 21:43:53,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:53,357 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:53,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:43:53,358 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:53,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash -612142141, now seen corresponding path program 1 times [2024-11-22 21:43:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483853688] [2024-11-22 21:43:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:53,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:53,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483853688] [2024-11-22 21:43:53,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483853688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:53,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:53,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:53,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554994943] [2024-11-22 21:43:53,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:53,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:43:53,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:43:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:43:53,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:53,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 133 transitions, 581 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:43:53,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:53,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:53,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:43:56,921 INFO L124 PetriNetUnfolderBase]: 19276/36646 cut-off events. [2024-11-22 21:43:56,921 INFO L125 PetriNetUnfolderBase]: For 25452/26319 co-relation queries the response was YES. [2024-11-22 21:43:57,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83383 conditions, 36646 events. 19276/36646 cut-off events. For 25452/26319 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 297556 event pairs, 6374 based on Foata normal form. 159/32075 useless extension candidates. Maximal degree in co-relation 83267. Up to 28009 conditions per place. [2024-11-22 21:43:57,175 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 98 selfloop transitions, 3 changer transitions 2/141 dead transitions. [2024-11-22 21:43:57,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 141 transitions, 810 flow [2024-11-22 21:43:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:43:57,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:43:57,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-11-22 21:43:57,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6957671957671958 [2024-11-22 21:43:57,177 INFO L175 Difference]: Start difference. First operand has 119 places, 133 transitions, 581 flow. Second operand 3 states and 263 transitions. [2024-11-22 21:43:57,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 141 transitions, 810 flow [2024-11-22 21:43:57,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 141 transitions, 810 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:43:57,192 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 593 flow [2024-11-22 21:43:57,193 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=593, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-11-22 21:43:57,193 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 13 predicate places. [2024-11-22 21:43:57,193 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 593 flow [2024-11-22 21:43:57,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:43:57,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:43:57,194 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:43:57,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:43:57,194 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:43:57,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:43:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 307697650, now seen corresponding path program 1 times [2024-11-22 21:43:57,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:43:57,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494799781] [2024-11-22 21:43:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:43:57,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:43:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:43:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:43:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:43:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494799781] [2024-11-22 21:43:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494799781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:43:57,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:43:57,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:43:57,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823532905] [2024-11-22 21:43:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:43:57,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:43:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:43:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:43:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:43:57,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:43:57,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 593 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:43:57,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:43:57,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:43:57,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:01,119 INFO L124 PetriNetUnfolderBase]: 18978/35938 cut-off events. [2024-11-22 21:44:01,120 INFO L125 PetriNetUnfolderBase]: For 25310/26177 co-relation queries the response was YES. [2024-11-22 21:44:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81964 conditions, 35938 events. 18978/35938 cut-off events. For 25310/26177 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 290229 event pairs, 10766 based on Foata normal form. 9/31317 useless extension candidates. Maximal degree in co-relation 81873. Up to 27566 conditions per place. [2024-11-22 21:44:01,374 INFO L140 encePairwiseOnDemand]: 122/126 looper letters, 90 selfloop transitions, 0 changer transitions 10/138 dead transitions. [2024-11-22 21:44:01,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 138 transitions, 798 flow [2024-11-22 21:44:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:44:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:44:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2024-11-22 21:44:01,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2024-11-22 21:44:01,375 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 593 flow. Second operand 3 states and 260 transitions. [2024-11-22 21:44:01,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 138 transitions, 798 flow [2024-11-22 21:44:01,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 138 transitions, 786 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-22 21:44:01,390 INFO L231 Difference]: Finished difference. Result has 122 places, 128 transitions, 555 flow [2024-11-22 21:44:01,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=122, PETRI_TRANSITIONS=128} [2024-11-22 21:44:01,391 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 12 predicate places. [2024-11-22 21:44:01,391 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 128 transitions, 555 flow [2024-11-22 21:44:01,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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 21:44:01,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:01,392 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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 21:44:01,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:44:01,392 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:44:01,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1365374999, now seen corresponding path program 1 times [2024-11-22 21:44:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:01,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496636500] [2024-11-22 21:44:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:44:01,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496636500] [2024-11-22 21:44:01,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496636500] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:01,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:01,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:44:01,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214899787] [2024-11-22 21:44:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:01,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:44:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:44:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:44:01,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 126 [2024-11-22 21:44:01,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 128 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 21:44:01,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:01,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 126 [2024-11-22 21:44:01,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:04,929 INFO L124 PetriNetUnfolderBase]: 18278/35505 cut-off events. [2024-11-22 21:44:04,929 INFO L125 PetriNetUnfolderBase]: For 23294/24138 co-relation queries the response was YES. [2024-11-22 21:44:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81008 conditions, 35505 events. 18278/35505 cut-off events. For 23294/24138 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 296226 event pairs, 9326 based on Foata normal form. 200/31258 useless extension candidates. Maximal degree in co-relation 80989. Up to 22270 conditions per place. [2024-11-22 21:44:05,146 INFO L140 encePairwiseOnDemand]: 123/126 looper letters, 130 selfloop transitions, 4 changer transitions 0/172 dead transitions. [2024-11-22 21:44:05,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 172 transitions, 998 flow [2024-11-22 21:44:05,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:44:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:44:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-22 21:44:05,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-11-22 21:44:05,148 INFO L175 Difference]: Start difference. First operand has 122 places, 128 transitions, 555 flow. Second operand 3 states and 282 transitions. [2024-11-22 21:44:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 172 transitions, 998 flow [2024-11-22 21:44:05,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 994 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-22 21:44:05,162 INFO L231 Difference]: Finished difference. Result has 122 places, 129 transitions, 569 flow [2024-11-22 21:44:05,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=569, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2024-11-22 21:44:05,163 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 12 predicate places. [2024-11-22 21:44:05,163 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 569 flow [2024-11-22 21:44:05,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 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 21:44:05,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:05,163 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:05,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:44:05,163 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:44:05,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1185376447, now seen corresponding path program 1 times [2024-11-22 21:44:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714695610] [2024-11-22 21:44:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:44:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714695610] [2024-11-22 21:44:05,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714695610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:44:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117183730] [2024-11-22 21:44:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:05,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:44:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:44:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:44:05,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-22 21:44:05,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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 21:44:05,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:05,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-22 21:44:05,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:44:10,921 INFO L124 PetriNetUnfolderBase]: 27446/48255 cut-off events. [2024-11-22 21:44:10,921 INFO L125 PetriNetUnfolderBase]: For 33451/34901 co-relation queries the response was YES. [2024-11-22 21:44:11,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117554 conditions, 48255 events. 27446/48255 cut-off events. For 33451/34901 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 382648 event pairs, 10864 based on Foata normal form. 0/43456 useless extension candidates. Maximal degree in co-relation 117534. Up to 26102 conditions per place. [2024-11-22 21:44:11,277 INFO L140 encePairwiseOnDemand]: 119/126 looper letters, 237 selfloop transitions, 8 changer transitions 0/278 dead transitions. [2024-11-22 21:44:11,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 278 transitions, 1696 flow [2024-11-22 21:44:11,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:44:11,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:44:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-22 21:44:11,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6984126984126984 [2024-11-22 21:44:11,279 INFO L175 Difference]: Start difference. First operand has 122 places, 129 transitions, 569 flow. Second operand 6 states and 528 transitions. [2024-11-22 21:44:11,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 278 transitions, 1696 flow [2024-11-22 21:44:11,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 278 transitions, 1690 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:44:11,298 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 603 flow [2024-11-22 21:44:11,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=126, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=603, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-22 21:44:11,299 INFO L277 CegarLoopForPetriNet]: 110 programPoint places, 18 predicate places. [2024-11-22 21:44:11,302 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 603 flow [2024-11-22 21:44:11,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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 21:44:11,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:44:11,302 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:44:11,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:44:11,303 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2024-11-22 21:44:11,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:44:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -302967060, now seen corresponding path program 1 times [2024-11-22 21:44:11,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:44:11,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065422747] [2024-11-22 21:44:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:44:11,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:44:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:44:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-22 21:44:11,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:44:11,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065422747] [2024-11-22 21:44:11,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065422747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:44:11,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:44:11,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:44:11,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833735131] [2024-11-22 21:44:11,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:44:11,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:44:11,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:44:11,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:44:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:44:11,398 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 126 [2024-11-22 21:44:11,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 65.0) internal successors, (325), 5 states have internal predecessors, (325), 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 21:44:11,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:44:11,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 126 [2024-11-22 21:44:11,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand