./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-3.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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:51:32,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:51:32,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:51:32,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:51:32,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:51:32,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:51:32,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:51:32,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:51:32,757 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:51:32,758 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:51:32,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:51:32,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:51:32,758 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:51:32,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:51:32,759 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:51:32,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:51:32,759 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:51:32,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:51:32,760 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:51:32,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:51:32,766 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:51:32,767 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:51:32,767 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:51:32,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:51:32,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:51:32,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:51:32,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:51:32,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:51:32,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:32,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:51:32,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:51:32,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:51:32,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:51:32,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:51:32,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:51:32,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:51:32,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:51:32,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-11-22 21:51:32,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:51:32,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:51:32,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:51:32,982 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:51:32,983 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:51:32,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-22 21:51:34,234 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:51:34,426 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:51:34,428 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-22 21:51:34,437 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd8c9e9d/3b8c18fdf5134b0db2e0f8d86acd175f/FLAG325f72daf [2024-11-22 21:51:34,455 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd8c9e9d/3b8c18fdf5134b0db2e0f8d86acd175f [2024-11-22 21:51:34,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:51:34,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:51:34,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:34,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:51:34,464 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:51:34,464 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,465 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63781541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34, skipping insertion in model container [2024-11-22 21:51:34,467 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:51:34,682 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 21:51:34,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:34,697 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:51:34,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:34,729 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:51:34,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34 WrapperNode [2024-11-22 21:51:34,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:34,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:34,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:51:34,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:51:34,736 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,762 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 241 [2024-11-22 21:51:34,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:34,763 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:51:34,763 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:51:34,763 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:51:34,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,775 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,786 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:51:34,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,792 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:51:34,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:51:34,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:51:34,801 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:51:34,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (1/1) ... [2024-11-22 21:51:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:34,842 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 21:51:34,868 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 21:51:34,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:51:34,921 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:51:34,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:51:34,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:51:34,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:51:34,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:51:34,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:51:34,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:51:34,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:51:34,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:51:34,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:51:34,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:51:34,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:51:34,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:51:34,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:51:34,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:51:34,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:51:34,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:51:34,937 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 21:51:35,036 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:51:35,038 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:51:35,342 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:51:35,342 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:51:35,534 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:51:35,535 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-22 21:51:35,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:35 BoogieIcfgContainer [2024-11-22 21:51:35,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:51:35,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:51:35,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:51:35,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:51:35,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:51:34" (1/3) ... [2024-11-22 21:51:35,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122466f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:35, skipping insertion in model container [2024-11-22 21:51:35,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:34" (2/3) ... [2024-11-22 21:51:35,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122466f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:35, skipping insertion in model container [2024-11-22 21:51:35,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:35" (3/3) ... [2024-11-22 21:51:35,543 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-11-22 21:51:35,556 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:51:35,556 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-22 21:51:35,556 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:51:35,607 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:51:35,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 145 flow [2024-11-22 21:51:35,671 INFO L124 PetriNetUnfolderBase]: 7/59 cut-off events. [2024-11-22 21:51:35,671 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:51:35,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 7/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 158 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-11-22 21:51:35,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 62 transitions, 145 flow [2024-11-22 21:51:35,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 58 transitions, 134 flow [2024-11-22 21:51:35,689 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:51:35,694 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;@6f059b3f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:51:35,695 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-22 21:51:35,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:51:35,697 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:51:35,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:35,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:35,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:35,700 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:35,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash 740948, now seen corresponding path program 1 times [2024-11-22 21:51:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:35,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378913549] [2024-11-22 21:51:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:35,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:35,903 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 21:51:35,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:35,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378913549] [2024-11-22 21:51:35,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378913549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:35,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:35,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:35,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123272343] [2024-11-22 21:51:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:35,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:35,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:35,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 21:51:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:35,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:36,533 INFO L124 PetriNetUnfolderBase]: 3101/5041 cut-off events. [2024-11-22 21:51:36,533 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-11-22 21:51:36,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9517 conditions, 5041 events. 3101/5041 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33100 event pairs, 2731 based on Foata normal form. 337/3515 useless extension candidates. Maximal degree in co-relation 9110. Up to 4203 conditions per place. [2024-11-22 21:51:36,564 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 38 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-22 21:51:36,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 202 flow [2024-11-22 21:51:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-22 21:51:36,573 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-22 21:51:36,574 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 134 flow. Second operand 3 states and 93 transitions. [2024-11-22 21:51:36,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 202 flow [2024-11-22 21:51:36,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:51:36,585 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 114 flow [2024-11-22 21:51:36,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-22 21:51:36,594 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-22 21:51:36,594 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 114 flow [2024-11-22 21:51:36,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 21:51:36,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:36,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:36,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:51:36,595 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:36,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:36,597 INFO L85 PathProgramCache]: Analyzing trace with hash 740949, now seen corresponding path program 1 times [2024-11-22 21:51:36,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:36,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304733346] [2024-11-22 21:51:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:36,857 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 21:51:36,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304733346] [2024-11-22 21:51:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304733346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:36,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:36,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199449517] [2024-11-22 21:51:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:36,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:36,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:36,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:36,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:36,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:36,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:36,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:36,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:37,266 INFO L124 PetriNetUnfolderBase]: 3101/5040 cut-off events. [2024-11-22 21:51:37,266 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-22 21:51:37,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 5040 events. 3101/5040 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33103 event pairs, 2731 based on Foata normal form. 0/3177 useless extension candidates. Maximal degree in co-relation 9334. Up to 4207 conditions per place. [2024-11-22 21:51:37,287 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-22 21:51:37,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 194 flow [2024-11-22 21:51:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-22 21:51:37,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-11-22 21:51:37,290 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 114 flow. Second operand 4 states and 106 transitions. [2024-11-22 21:51:37,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 194 flow [2024-11-22 21:51:37,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:37,293 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 116 flow [2024-11-22 21:51:37,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-22 21:51:37,294 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-22 21:51:37,294 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 116 flow [2024-11-22 21:51:37,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:37,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:37,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-22 21:51:37,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:51:37,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:37,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash 22969954, now seen corresponding path program 1 times [2024-11-22 21:51:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:37,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870613844] [2024-11-22 21:51:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:37,467 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 21:51:37,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:37,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870613844] [2024-11-22 21:51:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870613844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:37,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:37,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366379528] [2024-11-22 21:51:37,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:37,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:37,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 21:51:37,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:37,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:37,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:37,913 INFO L124 PetriNetUnfolderBase]: 3103/5046 cut-off events. [2024-11-22 21:51:37,914 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-22 21:51:37,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9372 conditions, 5046 events. 3103/5046 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33149 event pairs, 2731 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 9348. Up to 4210 conditions per place. [2024-11-22 21:51:37,940 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 40 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-11-22 21:51:37,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 228 flow [2024-11-22 21:51:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-22 21:51:37,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-11-22 21:51:37,942 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 116 flow. Second operand 5 states and 128 transitions. [2024-11-22 21:51:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 228 flow [2024-11-22 21:51:37,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:37,945 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 161 flow [2024-11-22 21:51:37,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-22 21:51:37,945 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-22 21:51:37,945 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 161 flow [2024-11-22 21:51:37,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 21:51:37,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:37,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-22 21:51:37,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:51:37,946 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:37,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash 599312510, now seen corresponding path program 1 times [2024-11-22 21:51:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:37,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051371421] [2024-11-22 21:51:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,188 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 21:51:38,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051371421] [2024-11-22 21:51:38,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051371421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829419176] [2024-11-22 21:51:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:38,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:38,194 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 21:51:38,198 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 21:51:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:51:38,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:38,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:51:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:38,648 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 21:51:38,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829419176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:38,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-22 21:51:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279127486] [2024-11-22 21:51:38,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:51:38,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:51:38,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:51:38,711 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:38,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 21:51:38,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:38,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,196 INFO L124 PetriNetUnfolderBase]: 3103/5045 cut-off events. [2024-11-22 21:51:39,197 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-22 21:51:39,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 5045 events. 3103/5045 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33088 event pairs, 2731 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 9344. Up to 4203 conditions per place. [2024-11-22 21:51:39,228 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 34 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-11-22 21:51:39,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 249 flow [2024-11-22 21:51:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:51:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:51:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-11-22 21:51:39,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-11-22 21:51:39,233 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 161 flow. Second operand 7 states and 159 transitions. [2024-11-22 21:51:39,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 249 flow [2024-11-22 21:51:39,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:39,235 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 180 flow [2024-11-22 21:51:39,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-22 21:51:39,236 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-22 21:51:39,236 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 180 flow [2024-11-22 21:51:39,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 21:51:39,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,236 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,243 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 21:51:39,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:39,437 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:39,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1402594028, now seen corresponding path program 1 times [2024-11-22 21:51:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398290974] [2024-11-22 21:51:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,495 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 21:51:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398290974] [2024-11-22 21:51:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398290974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57023579] [2024-11-22 21:51:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:39,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:39,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 21:51:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,876 INFO L124 PetriNetUnfolderBase]: 3243/5320 cut-off events. [2024-11-22 21:51:39,877 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-22 21:51:39,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9920 conditions, 5320 events. 3243/5320 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34862 event pairs, 2858 based on Foata normal form. 98/3590 useless extension candidates. Maximal degree in co-relation 9348. Up to 4212 conditions per place. [2024-11-22 21:51:39,893 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 58 selfloop transitions, 7 changer transitions 1/76 dead transitions. [2024-11-22 21:51:39,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 385 flow [2024-11-22 21:51:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-22 21:51:39,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5193548387096775 [2024-11-22 21:51:39,895 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 180 flow. Second operand 5 states and 161 transitions. [2024-11-22 21:51:39,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 385 flow [2024-11-22 21:51:39,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 336 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-22 21:51:39,897 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 214 flow [2024-11-22 21:51:39,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-22 21:51:39,898 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-22 21:51:39,898 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 214 flow [2024-11-22 21:51:39,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 21:51:39,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,898 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:51:39,899 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:39,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988887, now seen corresponding path program 1 times [2024-11-22 21:51:39,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278636962] [2024-11-22 21:51:39,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278636962] [2024-11-22 21:51:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278636962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474450740] [2024-11-22 21:51:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:39,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:39,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:39,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:39,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,174 INFO L124 PetriNetUnfolderBase]: 2352/3863 cut-off events. [2024-11-22 21:51:40,174 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2024-11-22 21:51:40,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 3863 events. 2352/3863 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23691 event pairs, 2053 based on Foata normal form. 0/2722 useless extension candidates. Maximal degree in co-relation 7380. Up to 3229 conditions per place. [2024-11-22 21:51:40,188 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 41 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-22 21:51:40,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 296 flow [2024-11-22 21:51:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-22 21:51:40,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-22 21:51:40,189 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 214 flow. Second operand 5 states and 120 transitions. [2024-11-22 21:51:40,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 296 flow [2024-11-22 21:51:40,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:40,192 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 210 flow [2024-11-22 21:51:40,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-11-22 21:51:40,192 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-22 21:51:40,192 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 210 flow [2024-11-22 21:51:40,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:51:40,193 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:40,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988888, now seen corresponding path program 1 times [2024-11-22 21:51:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468934897] [2024-11-22 21:51:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468934897] [2024-11-22 21:51:40,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468934897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:40,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146141405] [2024-11-22 21:51:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:40,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:40,328 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 21:51:40,330 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 21:51:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:51:40,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:40,390 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 21:51:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:51:40,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:51:40,454 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:51:40,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:51:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,479 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:51:40,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146141405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:51:40,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-22 21:51:40,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325672928] [2024-11-22 21:51:40,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:40,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:40,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:51:40,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:40,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 21:51:40,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,714 INFO L124 PetriNetUnfolderBase]: 1607/2665 cut-off events. [2024-11-22 21:51:40,714 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2024-11-22 21:51:40,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5295 conditions, 2665 events. 1607/2665 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14965 event pairs, 1376 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 4715. Up to 2230 conditions per place. [2024-11-22 21:51:40,724 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 41 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2024-11-22 21:51:40,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 286 flow [2024-11-22 21:51:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:40,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-22 21:51:40,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-11-22 21:51:40,725 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 210 flow. Second operand 4 states and 101 transitions. [2024-11-22 21:51:40,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 286 flow [2024-11-22 21:51:40,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 271 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:40,727 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 189 flow [2024-11-22 21:51:40,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-22 21:51:40,728 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-22 21:51:40,728 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 189 flow [2024-11-22 21:51:40,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 21:51:40,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,735 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 21:51:40,932 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,SelfDestructingSolverStorable6 [2024-11-22 21:51:40,933 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:40,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash 444143548, now seen corresponding path program 1 times [2024-11-22 21:51:40,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755474893] [2024-11-22 21:51:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,965 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 21:51:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755474893] [2024-11-22 21:51:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755474893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722682944] [2024-11-22 21:51:40,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:40,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:40,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:40,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:40,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,108 INFO L124 PetriNetUnfolderBase]: 1499/2491 cut-off events. [2024-11-22 21:51:41,109 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-11-22 21:51:41,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 2491 events. 1499/2491 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13265 event pairs, 577 based on Foata normal form. 71/1987 useless extension candidates. Maximal degree in co-relation 4858. Up to 1517 conditions per place. [2024-11-22 21:51:41,117 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 52 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2024-11-22 21:51:41,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 345 flow [2024-11-22 21:51:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-22 21:51:41,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-11-22 21:51:41,118 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 189 flow. Second operand 3 states and 106 transitions. [2024-11-22 21:51:41,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 345 flow [2024-11-22 21:51:41,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:41,119 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 162 flow [2024-11-22 21:51:41,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-11-22 21:51:41,120 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-22 21:51:41,120 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 162 flow [2024-11-22 21:51:41,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,120 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:41,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:51:41,121 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:41,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash 697145832, now seen corresponding path program 1 times [2024-11-22 21:51:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072341872] [2024-11-22 21:51:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:41,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072341872] [2024-11-22 21:51:41,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072341872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:41,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:41,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861758666] [2024-11-22 21:51:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:41,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:41,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:41,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:41,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,307 INFO L124 PetriNetUnfolderBase]: 1318/2188 cut-off events. [2024-11-22 21:51:41,307 INFO L125 PetriNetUnfolderBase]: For 408/411 co-relation queries the response was YES. [2024-11-22 21:51:41,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 2188 events. 1318/2188 cut-off events. For 408/411 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11003 event pairs, 527 based on Foata normal form. 15/1831 useless extension candidates. Maximal degree in co-relation 4773. Up to 1772 conditions per place. [2024-11-22 21:51:41,314 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2024-11-22 21:51:41,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 288 flow [2024-11-22 21:51:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-22 21:51:41,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-22 21:51:41,315 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 162 flow. Second operand 3 states and 99 transitions. [2024-11-22 21:51:41,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 288 flow [2024-11-22 21:51:41,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 278 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:41,317 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 175 flow [2024-11-22 21:51:41,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-22 21:51:41,317 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-22 21:51:41,318 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 175 flow [2024-11-22 21:51:41,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,318 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:41,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:51:41,318 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:41,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1765386403, now seen corresponding path program 1 times [2024-11-22 21:51:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916138051] [2024-11-22 21:51:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:41,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916138051] [2024-11-22 21:51:41,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916138051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:41,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:41,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637275693] [2024-11-22 21:51:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:41,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:41,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:51:41,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:41,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,484 INFO L124 PetriNetUnfolderBase]: 964/1685 cut-off events. [2024-11-22 21:51:41,484 INFO L125 PetriNetUnfolderBase]: For 869/869 co-relation queries the response was YES. [2024-11-22 21:51:41,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1685 events. 964/1685 cut-off events. For 869/869 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8472 event pairs, 704 based on Foata normal form. 0/1513 useless extension candidates. Maximal degree in co-relation 3873. Up to 1366 conditions per place. [2024-11-22 21:51:41,491 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 37 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-11-22 21:51:41,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 249 flow [2024-11-22 21:51:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-22 21:51:41,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-11-22 21:51:41,492 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 175 flow. Second operand 4 states and 98 transitions. [2024-11-22 21:51:41,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 249 flow [2024-11-22 21:51:41,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:41,494 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 162 flow [2024-11-22 21:51:41,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-22 21:51:41,494 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-22 21:51:41,494 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 162 flow [2024-11-22 21:51:41,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 21:51:41,495 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,495 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:41,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:51:41,495 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:41,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1464885612, now seen corresponding path program 1 times [2024-11-22 21:51:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547857692] [2024-11-22 21:51:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:41,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547857692] [2024-11-22 21:51:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547857692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:41,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:41,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:41,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93046521] [2024-11-22 21:51:41,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:41,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:41,548 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:41,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 21:51:41,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:41,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,697 INFO L124 PetriNetUnfolderBase]: 1205/2131 cut-off events. [2024-11-22 21:51:41,697 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-11-22 21:51:41,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 2131 events. 1205/2131 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11110 event pairs, 906 based on Foata normal form. 64/2025 useless extension candidates. Maximal degree in co-relation 4540. Up to 1374 conditions per place. [2024-11-22 21:51:41,704 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 2 changer transitions 19/68 dead transitions. [2024-11-22 21:51:41,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 328 flow [2024-11-22 21:51:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-22 21:51:41,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040322580645161 [2024-11-22 21:51:41,705 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 162 flow. Second operand 4 states and 125 transitions. [2024-11-22 21:51:41,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 328 flow [2024-11-22 21:51:41,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:41,707 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 160 flow [2024-11-22 21:51:41,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-22 21:51:41,707 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-22 21:51:41,707 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 160 flow [2024-11-22 21:51:41,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 21:51:41,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:41,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:51:41,708 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:41,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,708 INFO L85 PathProgramCache]: Analyzing trace with hash 962373648, now seen corresponding path program 1 times [2024-11-22 21:51:41,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960995359] [2024-11-22 21:51:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960995359] [2024-11-22 21:51:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960995359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:41,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6010578] [2024-11-22 21:51:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:41,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:41,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 21:51:41,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:41,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,999 INFO L124 PetriNetUnfolderBase]: 663/1231 cut-off events. [2024-11-22 21:51:41,999 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-11-22 21:51:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1231 events. 663/1231 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6188 event pairs, 474 based on Foata normal form. 86/1223 useless extension candidates. Maximal degree in co-relation 2593. Up to 945 conditions per place. [2024-11-22 21:51:42,004 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-22 21:51:42,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 226 flow [2024-11-22 21:51:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-22 21:51:42,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-11-22 21:51:42,005 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 160 flow. Second operand 4 states and 104 transitions. [2024-11-22 21:51:42,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 226 flow [2024-11-22 21:51:42,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 222 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:42,006 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 152 flow [2024-11-22 21:51:42,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-11-22 21:51:42,008 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-22 21:51:42,008 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 152 flow [2024-11-22 21:51:42,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 21:51:42,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:42,009 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:42,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:51:42,009 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:42,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash 214930534, now seen corresponding path program 1 times [2024-11-22 21:51:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:42,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712442642] [2024-11-22 21:51:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:51:42,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:42,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712442642] [2024-11-22 21:51:42,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712442642] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:42,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:42,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:51:42,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657151956] [2024-11-22 21:51:42,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:42,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:51:42,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:51:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:51:42,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-22 21:51:42,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 21:51:42,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:42,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-22 21:51:42,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:42,365 INFO L124 PetriNetUnfolderBase]: 1274/2136 cut-off events. [2024-11-22 21:51:42,365 INFO L125 PetriNetUnfolderBase]: For 548/564 co-relation queries the response was YES. [2024-11-22 21:51:42,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4759 conditions, 2136 events. 1274/2136 cut-off events. For 548/564 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11770 event pairs, 342 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 4730. Up to 775 conditions per place. [2024-11-22 21:51:42,372 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 82 selfloop transitions, 9 changer transitions 10/109 dead transitions. [2024-11-22 21:51:42,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 527 flow [2024-11-22 21:51:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:51:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:51:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-11-22 21:51:42,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4495967741935484 [2024-11-22 21:51:42,374 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 152 flow. Second operand 8 states and 223 transitions. [2024-11-22 21:51:42,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 527 flow [2024-11-22 21:51:42,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:42,375 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 199 flow [2024-11-22 21:51:42,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-11-22 21:51:42,376 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2024-11-22 21:51:42,376 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 199 flow [2024-11-22 21:51:42,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 21:51:42,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:42,376 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:42,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:51:42,376 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:42,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash -928937351, now seen corresponding path program 1 times [2024-11-22 21:51:42,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:42,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955053483] [2024-11-22 21:51:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:42,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:42,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955053483] [2024-11-22 21:51:42,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955053483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:42,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076761661] [2024-11-22 21:51:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:42,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:42,476 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 21:51:42,477 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 21:51:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:42,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:51:42,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:42,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:42,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076761661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:42,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:42,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-22 21:51:42,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527835306] [2024-11-22 21:51:42,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:42,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:51:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:51:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:51:42,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:42,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 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 21:51:42,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:42,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:42,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:43,123 INFO L124 PetriNetUnfolderBase]: 1661/3295 cut-off events. [2024-11-22 21:51:43,123 INFO L125 PetriNetUnfolderBase]: For 1421/1423 co-relation queries the response was YES. [2024-11-22 21:51:43,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7666 conditions, 3295 events. 1661/3295 cut-off events. For 1421/1423 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21951 event pairs, 909 based on Foata normal form. 113/3257 useless extension candidates. Maximal degree in co-relation 7650. Up to 1488 conditions per place. [2024-11-22 21:51:43,134 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 68 selfloop transitions, 17 changer transitions 6/104 dead transitions. [2024-11-22 21:51:43,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 558 flow [2024-11-22 21:51:43,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:51:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:51:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-22 21:51:43,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-11-22 21:51:43,135 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 199 flow. Second operand 10 states and 262 transitions. [2024-11-22 21:51:43,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 558 flow [2024-11-22 21:51:43,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 551 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:43,138 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 318 flow [2024-11-22 21:51:43,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=318, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-11-22 21:51:43,138 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-11-22 21:51:43,139 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 318 flow [2024-11-22 21:51:43,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 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 21:51:43,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:43,139 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:43,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:51:43,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:43,344 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:43,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash 422238282, now seen corresponding path program 1 times [2024-11-22 21:51:43,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:43,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332902538] [2024-11-22 21:51:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:43,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:51:43,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:43,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332902538] [2024-11-22 21:51:43,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332902538] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:43,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:43,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768595294] [2024-11-22 21:51:43,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:43,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:43,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:43,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:43,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:43,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:43,891 INFO L124 PetriNetUnfolderBase]: 2547/5190 cut-off events. [2024-11-22 21:51:43,892 INFO L125 PetriNetUnfolderBase]: For 4301/4459 co-relation queries the response was YES. [2024-11-22 21:51:43,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12647 conditions, 5190 events. 2547/5190 cut-off events. For 4301/4459 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 37434 event pairs, 732 based on Foata normal form. 132/5066 useless extension candidates. Maximal degree in co-relation 9774. Up to 1370 conditions per place. [2024-11-22 21:51:43,917 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 82 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-22 21:51:43,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 637 flow [2024-11-22 21:51:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-22 21:51:43,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-11-22 21:51:43,920 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 318 flow. Second operand 4 states and 138 transitions. [2024-11-22 21:51:43,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 637 flow [2024-11-22 21:51:43,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 620 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:43,927 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 362 flow [2024-11-22 21:51:43,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=362, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-22 21:51:43,927 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 18 predicate places. [2024-11-22 21:51:43,927 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 362 flow [2024-11-22 21:51:43,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:43,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:43,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:43,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:51:43,928 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:43,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:43,929 INFO L85 PathProgramCache]: Analyzing trace with hash 449455392, now seen corresponding path program 2 times [2024-11-22 21:51:43,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:43,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10588589] [2024-11-22 21:51:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:43,954 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:43,955 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:44,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:44,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10588589] [2024-11-22 21:51:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10588589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851891055] [2024-11-22 21:51:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:44,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:44,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:44,855 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 21:51:44,864 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 21:51:44,940 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:44,940 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:44,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 21:51:44,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:51:45,033 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:45,086 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:51:45,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 21:51:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851891055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:45,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 4] total 19 [2024-11-22 21:51:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6114255] [2024-11-22 21:51:45,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:45,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:51:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:51:45,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:51:45,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 62 [2024-11-22 21:51:45,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 362 flow. Second operand has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 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 21:51:45,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:45,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 62 [2024-11-22 21:51:45,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:47,137 INFO L124 PetriNetUnfolderBase]: 6186/10420 cut-off events. [2024-11-22 21:51:47,137 INFO L125 PetriNetUnfolderBase]: For 11386/11391 co-relation queries the response was YES. [2024-11-22 21:51:47,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28605 conditions, 10420 events. 6186/10420 cut-off events. For 11386/11391 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 69312 event pairs, 1632 based on Foata normal form. 264/10603 useless extension candidates. Maximal degree in co-relation 22294. Up to 5302 conditions per place. [2024-11-22 21:51:47,183 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 184 selfloop transitions, 38 changer transitions 0/228 dead transitions. [2024-11-22 21:51:47,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 228 transitions, 1487 flow [2024-11-22 21:51:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-22 21:51:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-22 21:51:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 495 transitions. [2024-11-22 21:51:47,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38018433179723504 [2024-11-22 21:51:47,189 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 362 flow. Second operand 21 states and 495 transitions. [2024-11-22 21:51:47,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 228 transitions, 1487 flow [2024-11-22 21:51:47,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 228 transitions, 1469 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-11-22 21:51:47,197 INFO L231 Difference]: Finished difference. Result has 109 places, 96 transitions, 726 flow [2024-11-22 21:51:47,198 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=726, PETRI_PLACES=109, PETRI_TRANSITIONS=96} [2024-11-22 21:51:47,198 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 48 predicate places. [2024-11-22 21:51:47,198 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 96 transitions, 726 flow [2024-11-22 21:51:47,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 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 21:51:47,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:47,199 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:47,205 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 21:51:47,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:51:47,400 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:47,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 880116960, now seen corresponding path program 1 times [2024-11-22 21:51:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912647415] [2024-11-22 21:51:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:51:47,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:47,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912647415] [2024-11-22 21:51:47,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912647415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:47,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:47,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555870834] [2024-11-22 21:51:47,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:47,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:47,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:47,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:47,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 96 transitions, 726 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:51:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:47,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:48,671 INFO L124 PetriNetUnfolderBase]: 6371/11915 cut-off events. [2024-11-22 21:51:48,672 INFO L125 PetriNetUnfolderBase]: For 29864/30906 co-relation queries the response was YES. [2024-11-22 21:51:48,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37778 conditions, 11915 events. 6371/11915 cut-off events. For 29864/30906 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 93217 event pairs, 1759 based on Foata normal form. 371/11808 useless extension candidates. Maximal degree in co-relation 36335. Up to 3512 conditions per place. [2024-11-22 21:51:48,735 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 120 selfloop transitions, 17 changer transitions 15/166 dead transitions. [2024-11-22 21:51:48,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 166 transitions, 1472 flow [2024-11-22 21:51:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:48,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:48,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-22 21:51:48,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-22 21:51:48,737 INFO L175 Difference]: Start difference. First operand has 109 places, 96 transitions, 726 flow. Second operand 4 states and 144 transitions. [2024-11-22 21:51:48,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 166 transitions, 1472 flow [2024-11-22 21:51:48,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1407 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-11-22 21:51:48,791 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 737 flow [2024-11-22 21:51:48,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2024-11-22 21:51:48,792 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 48 predicate places. [2024-11-22 21:51:48,792 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 737 flow [2024-11-22 21:51:48,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 21:51:48,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:48,792 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:48,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:51:48,793 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:48,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:48,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1272816476, now seen corresponding path program 1 times [2024-11-22 21:51:48,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:48,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865676781] [2024-11-22 21:51:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865676781] [2024-11-22 21:51:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865676781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040821079] [2024-11-22 21:51:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:48,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:48,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:48,986 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 21:51:48,987 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 21:51:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:49,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:51:49,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:49,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040821079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:49,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-22 21:51:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285045746] [2024-11-22 21:51:49,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:49,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:51:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:51:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:51:49,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-22 21:51:49,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 737 flow. Second operand has 15 states, 15 states have (on average 22.8) internal successors, (342), 15 states have internal predecessors, (342), 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 21:51:49,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:49,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-22 21:51:49,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:50,629 INFO L124 PetriNetUnfolderBase]: 5844/11410 cut-off events. [2024-11-22 21:51:50,629 INFO L125 PetriNetUnfolderBase]: For 37049/37513 co-relation queries the response was YES. [2024-11-22 21:51:50,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38674 conditions, 11410 events. 5844/11410 cut-off events. For 37049/37513 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 89515 event pairs, 3479 based on Foata normal form. 376/11412 useless extension candidates. Maximal degree in co-relation 38647. Up to 5456 conditions per place. [2024-11-22 21:51:50,682 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 48 selfloop transitions, 16 changer transitions 76/153 dead transitions. [2024-11-22 21:51:50,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 153 transitions, 1450 flow [2024-11-22 21:51:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:51:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:51:50,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-11-22 21:51:50,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2024-11-22 21:51:50,686 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 737 flow. Second operand 9 states and 237 transitions. [2024-11-22 21:51:50,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 153 transitions, 1450 flow [2024-11-22 21:51:50,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 153 transitions, 1294 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:50,747 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 567 flow [2024-11-22 21:51:50,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=567, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2024-11-22 21:51:50,747 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 48 predicate places. [2024-11-22 21:51:50,747 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 567 flow [2024-11-22 21:51:50,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.8) internal successors, (342), 15 states have internal predecessors, (342), 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 21:51:50,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:50,749 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:50,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:50,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:51:50,950 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:51:50,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:50,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1611600132, now seen corresponding path program 2 times [2024-11-22 21:51:50,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:50,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774340041] [2024-11-22 21:51:50,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:50,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:51,009 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:51,009 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:52,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:52,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774340041] [2024-11-22 21:51:52,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774340041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:52,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263892953] [2024-11-22 21:51:52,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:52,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:52,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:52,322 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 21:51:52,325 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 21:51:52,409 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:52,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:52,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-22 21:51:52,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:52,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-22 21:51:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:52,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:52,958 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:51:52,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-22 21:51:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:53,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263892953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:53,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:53,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 31 [2024-11-22 21:51:53,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551464540] [2024-11-22 21:51:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:53,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 21:51:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 21:51:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-11-22 21:51:53,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 62 [2024-11-22 21:51:53,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 77 transitions, 567 flow. Second operand has 31 states, 31 states have (on average 15.193548387096774) internal successors, (471), 31 states have internal predecessors, (471), 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 21:51:53,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:53,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 62 [2024-11-22 21:51:53,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:09,388 INFO L124 PetriNetUnfolderBase]: 53048/85350 cut-off events. [2024-11-22 21:52:09,388 INFO L125 PetriNetUnfolderBase]: For 197178/197178 co-relation queries the response was YES. [2024-11-22 21:52:09,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277249 conditions, 85350 events. 53048/85350 cut-off events. For 197178/197178 co-relation queries the response was YES. Maximal size of possible extension queue 2164. Compared 694819 event pairs, 3178 based on Foata normal form. 2904/88083 useless extension candidates. Maximal degree in co-relation 277220. Up to 10293 conditions per place. [2024-11-22 21:52:10,269 INFO L140 encePairwiseOnDemand]: 46/62 looper letters, 1158 selfloop transitions, 373 changer transitions 2/1541 dead transitions. [2024-11-22 21:52:10,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1541 transitions, 11968 flow [2024-11-22 21:52:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-22 21:52:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2024-11-22 21:52:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 2335 transitions. [2024-11-22 21:52:10,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38041707396546104 [2024-11-22 21:52:10,275 INFO L175 Difference]: Start difference. First operand has 109 places, 77 transitions, 567 flow. Second operand 99 states and 2335 transitions. [2024-11-22 21:52:10,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1541 transitions, 11968 flow [2024-11-22 21:52:12,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 1541 transitions, 11566 flow, removed 112 selfloop flow, removed 9 redundant places. [2024-11-22 21:52:12,238 INFO L231 Difference]: Finished difference. Result has 247 places, 464 transitions, 5021 flow [2024-11-22 21:52:12,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=5021, PETRI_PLACES=247, PETRI_TRANSITIONS=464} [2024-11-22 21:52:12,239 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 186 predicate places. [2024-11-22 21:52:12,239 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 464 transitions, 5021 flow [2024-11-22 21:52:12,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 15.193548387096774) internal successors, (471), 31 states have internal predecessors, (471), 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 21:52:12,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:12,239 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:12,250 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 21:52:12,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:12,440 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-22 21:52:12,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash 71849354, now seen corresponding path program 3 times [2024-11-22 21:52:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:12,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91864675] [2024-11-22 21:52:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:12,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:12,467 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:52:12,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:12,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:12,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91864675] [2024-11-22 21:52:12,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91864675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:12,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:12,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:52:12,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818741525] [2024-11-22 21:52:12,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:12,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:52:12,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:52:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:52:12,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 62 [2024-11-22 21:52:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 464 transitions, 5021 flow. Second operand has 6 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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 21:52:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 62 [2024-11-22 21:52:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand