./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:48:22,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:48:22,401 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:48:22,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:48:22,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:48:22,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:48:22,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:48:22,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:48:22,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:48:22,434 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:48:22,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:48:22,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:48:22,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:48:22,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:48:22,436 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:48:22,436 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:48:22,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:48:22,437 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:48:22,437 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:48:22,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:48:22,438 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:48:22,438 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:48:22,441 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:48:22,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:48:22,442 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:48:22,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:48:22,442 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:48:22,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:48:22,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:48:22,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:48:22,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:48:22,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:48:22,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:48:22,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:22,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:48:22,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:48:22,444 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:48:22,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:48:22,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:48:22,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:48:22,445 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:48:22,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:48:22,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-11-22 21:48:22,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:48:22,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:48:22,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:48:22,680 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:48:22,681 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:48:22,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-22 21:48:23,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:48:24,152 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:48:24,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-11-22 21:48:24,160 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c835899c5/557677668079443abd76c9e87d3e7da0/FLAGf35e1423f [2024-11-22 21:48:24,552 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c835899c5/557677668079443abd76c9e87d3e7da0 [2024-11-22 21:48:24,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:48:24,557 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:48:24,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:24,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:48:24,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:48:24,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e22e933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24, skipping insertion in model container [2024-11-22 21:48:24,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,588 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:48:24,762 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 21:48:24,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:24,772 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:48:24,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:24,808 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:48:24,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24 WrapperNode [2024-11-22 21:48:24,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:24,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:24,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:48:24,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:48:24,829 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,865 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 184 [2024-11-22 21:48:24,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:24,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:48:24,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:48:24,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:48:24,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,889 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,901 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:48:24,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,911 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,912 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:48:24,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:48:24,915 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:48:24,915 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:48:24,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (1/1) ... [2024-11-22 21:48:24,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:24,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:24,961 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 21:48:24,965 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 21:48:25,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:48:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:48:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:48:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:48:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:48:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:48:25,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:48:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:48:25,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:48:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:48:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:48:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:48:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:48:25,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:48:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:48:25,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:48:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:48:25,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:48:25,005 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 21:48:25,109 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:48:25,111 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:48:25,423 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:48:25,423 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:48:25,683 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:48:25,683 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:48:25,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:25 BoogieIcfgContainer [2024-11-22 21:48:25,684 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:48:25,686 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:48:25,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:48:25,690 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:48:25,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:48:24" (1/3) ... [2024-11-22 21:48:25,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f3728e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:25, skipping insertion in model container [2024-11-22 21:48:25,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:24" (2/3) ... [2024-11-22 21:48:25,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f3728e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:25, skipping insertion in model container [2024-11-22 21:48:25,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:25" (3/3) ... [2024-11-22 21:48:25,694 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-11-22 21:48:25,708 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:48:25,708 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-22 21:48:25,708 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:48:25,773 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:48:25,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-11-22 21:48:25,838 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-11-22 21:48:25,838 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:48:25,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-11-22 21:48:25,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-11-22 21:48:25,846 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-11-22 21:48:25,856 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:48:25,861 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;@6b6bc70f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:48:25,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-22 21:48:25,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:48:25,865 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:48:25,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:48:25,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:25,868 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:25,868 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:25,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:25,872 INFO L85 PathProgramCache]: Analyzing trace with hash 608571, now seen corresponding path program 1 times [2024-11-22 21:48:25,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:25,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818598428] [2024-11-22 21:48:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:26,138 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 21:48:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818598428] [2024-11-22 21:48:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818598428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:26,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:26,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:48:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393934154] [2024-11-22 21:48:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:26,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:26,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:26,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:26,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:26,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:26,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:26,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:26,475 INFO L124 PetriNetUnfolderBase]: 1316/1925 cut-off events. [2024-11-22 21:48:26,475 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-11-22 21:48:26,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1925 events. 1316/1925 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9784 event pairs, 1060 based on Foata normal form. 1/1372 useless extension candidates. Maximal degree in co-relation 3632. Up to 1877 conditions per place. [2024-11-22 21:48:26,488 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-22 21:48:26,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-22 21:48:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-22 21:48:26,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-11-22 21:48:26,499 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-11-22 21:48:26,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-22 21:48:26,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:26,506 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-22 21:48:26,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-22 21:48:26,510 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-11-22 21:48:26,511 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-22 21:48:26,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:26,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:26,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:48:26,512 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:26,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash 608572, now seen corresponding path program 1 times [2024-11-22 21:48:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:26,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634718674] [2024-11-22 21:48:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:26,703 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 21:48:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634718674] [2024-11-22 21:48:26,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634718674] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:26,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271322741] [2024-11-22 21:48:26,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:26,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:26,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:26,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:26,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:26,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:26,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:26,914 INFO L124 PetriNetUnfolderBase]: 1317/1928 cut-off events. [2024-11-22 21:48:26,914 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:48:26,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1928 events. 1317/1928 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9832 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3838. Up to 1882 conditions per place. [2024-11-22 21:48:26,922 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-22 21:48:26,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-22 21:48:26,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-22 21:48:26,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-11-22 21:48:26,925 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-22 21:48:26,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-22 21:48:26,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:26,927 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-22 21:48:26,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-22 21:48:26,927 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-22 21:48:26,927 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-22 21:48:26,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:26,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:48:26,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:48:26,928 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:26,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash 584856210, now seen corresponding path program 1 times [2024-11-22 21:48:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:26,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456040501] [2024-11-22 21:48:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:27,166 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 21:48:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456040501] [2024-11-22 21:48:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456040501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:27,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059368472] [2024-11-22 21:48:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:27,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:27,171 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 21:48:27,173 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 21:48:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:27,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:48:27,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:27,291 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 21:48:27,440 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 21:48:27,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:27,546 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 21:48:27,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059368472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:27,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:48:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877732376] [2024-11-22 21:48:27,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:27,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:27,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:27,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:27,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:27,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:27,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:27,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:27,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:27,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:27,893 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-11-22 21:48:27,894 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-22 21:48:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3867 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9798 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3845. Up to 1878 conditions per place. [2024-11-22 21:48:27,902 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-22 21:48:27,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-22 21:48:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-22 21:48:27,904 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-11-22 21:48:27,905 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-22 21:48:27,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-22 21:48:27,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:27,906 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-22 21:48:27,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-22 21:48:27,907 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-11-22 21:48:27,907 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-22 21:48:27,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:27,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:27,908 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:48:27,919 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 21:48:28,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:28,113 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:28,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:28,114 INFO L85 PathProgramCache]: Analyzing trace with hash 952797354, now seen corresponding path program 1 times [2024-11-22 21:48:28,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:28,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747897618] [2024-11-22 21:48:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:28,177 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 21:48:28,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:28,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747897618] [2024-11-22 21:48:28,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747897618] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:28,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327996607] [2024-11-22 21:48:28,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:28,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:28,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:28,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 21:48:28,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:28,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:28,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:28,323 INFO L124 PetriNetUnfolderBase]: 793/1173 cut-off events. [2024-11-22 21:48:28,324 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 21:48:28,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1173 events. 793/1173 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5312 event pairs, 608 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 2338. Up to 1135 conditions per place. [2024-11-22 21:48:28,330 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-22 21:48:28,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 172 flow [2024-11-22 21:48:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-22 21:48:28,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-22 21:48:28,331 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 4 states and 68 transitions. [2024-11-22 21:48:28,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 172 flow [2024-11-22 21:48:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:48:28,333 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2024-11-22 21:48:28,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-22 21:48:28,334 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2024-11-22 21:48:28,334 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2024-11-22 21:48:28,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 21:48:28,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:28,334 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:48:28,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:48:28,334 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:28,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash 952797355, now seen corresponding path program 1 times [2024-11-22 21:48:28,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:28,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150980851] [2024-11-22 21:48:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:28,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:28,379 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 21:48:28,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150980851] [2024-11-22 21:48:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150980851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:28,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498906131] [2024-11-22 21:48:28,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:28,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:28,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:28,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:28,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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 21:48:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:28,568 INFO L124 PetriNetUnfolderBase]: 1374/2050 cut-off events. [2024-11-22 21:48:28,569 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-22 21:48:28,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 2050 events. 1374/2050 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10084 event pairs, 908 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2756. Up to 1347 conditions per place. [2024-11-22 21:48:28,577 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-22 21:48:28,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 306 flow [2024-11-22 21:48:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-22 21:48:28,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-22 21:48:28,578 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 5 states and 116 transitions. [2024-11-22 21:48:28,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 306 flow [2024-11-22 21:48:28,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:28,580 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 105 flow [2024-11-22 21:48:28,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-22 21:48:28,580 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-11-22 21:48:28,581 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 105 flow [2024-11-22 21:48:28,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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 21:48:28,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:28,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:28,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:48:28,581 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:28,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1228269675, now seen corresponding path program 1 times [2024-11-22 21:48:28,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:28,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658926370] [2024-11-22 21:48:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:28,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:28,728 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 21:48:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:28,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658926370] [2024-11-22 21:48:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658926370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:28,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142857433] [2024-11-22 21:48:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:28,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:28,732 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 21:48:28,736 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 21:48:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:28,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:28,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:28,831 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 21:48:28,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:28,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:48:28,881 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 21:48:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142857433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:28,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 21:48:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270310360] [2024-11-22 21:48:28,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:28,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:48:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:28,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:48:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:48:28,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-22 21:48:28,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 21:48:28,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:28,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-22 21:48:28,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:29,255 INFO L124 PetriNetUnfolderBase]: 1583/2381 cut-off events. [2024-11-22 21:48:29,255 INFO L125 PetriNetUnfolderBase]: For 495/554 co-relation queries the response was YES. [2024-11-22 21:48:29,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2381 events. 1583/2381 cut-off events. For 495/554 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12067 event pairs, 841 based on Foata normal form. 0/2057 useless extension candidates. Maximal degree in co-relation 3615. Up to 987 conditions per place. [2024-11-22 21:48:29,265 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-11-22 21:48:29,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 397 flow [2024-11-22 21:48:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-11-22 21:48:29,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-11-22 21:48:29,268 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 105 flow. Second operand 7 states and 158 transitions. [2024-11-22 21:48:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 397 flow [2024-11-22 21:48:29,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 91 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:29,272 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 141 flow [2024-11-22 21:48:29,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-22 21:48:29,273 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-22 21:48:29,274 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 141 flow [2024-11-22 21:48:29,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 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 21:48:29,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:29,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:29,280 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 21:48:29,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-22 21:48:29,475 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:29,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:29,476 INFO L85 PathProgramCache]: Analyzing trace with hash 809084184, now seen corresponding path program 1 times [2024-11-22 21:48:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:29,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398495909] [2024-11-22 21:48:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:29,543 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 21:48:29,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398495909] [2024-11-22 21:48:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398495909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:29,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76885088] [2024-11-22 21:48:29,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:29,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:29,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:29,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 21:48:29,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:29,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:29,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:29,772 INFO L124 PetriNetUnfolderBase]: 1597/2360 cut-off events. [2024-11-22 21:48:29,772 INFO L125 PetriNetUnfolderBase]: For 2106/2237 co-relation queries the response was YES. [2024-11-22 21:48:29,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 2360 events. 1597/2360 cut-off events. For 2106/2237 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10917 event pairs, 1152 based on Foata normal form. 0/2062 useless extension candidates. Maximal degree in co-relation 5089. Up to 1932 conditions per place. [2024-11-22 21:48:29,783 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-22 21:48:29,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 345 flow [2024-11-22 21:48:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-11-22 21:48:29,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-11-22 21:48:29,785 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 141 flow. Second operand 5 states and 109 transitions. [2024-11-22 21:48:29,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 345 flow [2024-11-22 21:48:29,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 331 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:29,789 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 154 flow [2024-11-22 21:48:29,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-11-22 21:48:29,791 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-22 21:48:29,791 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 154 flow [2024-11-22 21:48:29,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 21:48:29,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:29,792 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:29,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:48:29,792 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:29,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 133990468, now seen corresponding path program 1 times [2024-11-22 21:48:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:29,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129061703] [2024-11-22 21:48:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:29,872 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 21:48:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129061703] [2024-11-22 21:48:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129061703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201165449] [2024-11-22 21:48:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:29,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:29,894 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:29,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 21:48:29,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:29,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:29,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:30,105 INFO L124 PetriNetUnfolderBase]: 1468/2133 cut-off events. [2024-11-22 21:48:30,105 INFO L125 PetriNetUnfolderBase]: For 2057/2277 co-relation queries the response was YES. [2024-11-22 21:48:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5737 conditions, 2133 events. 1468/2133 cut-off events. For 2057/2277 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9754 event pairs, 1104 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5084. Up to 1890 conditions per place. [2024-11-22 21:48:30,120 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-22 21:48:30,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 332 flow [2024-11-22 21:48:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-11-22 21:48:30,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-11-22 21:48:30,122 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 154 flow. Second operand 5 states and 102 transitions. [2024-11-22 21:48:30,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 332 flow [2024-11-22 21:48:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:30,124 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 174 flow [2024-11-22 21:48:30,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-11-22 21:48:30,126 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-22 21:48:30,127 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 174 flow [2024-11-22 21:48:30,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 21:48:30,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:30,127 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:30,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:48:30,127 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:30,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash 747708802, now seen corresponding path program 1 times [2024-11-22 21:48:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:30,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727239868] [2024-11-22 21:48:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:30,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:30,256 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 21:48:30,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727239868] [2024-11-22 21:48:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727239868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825159740] [2024-11-22 21:48:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:30,260 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 21:48:30,264 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 21:48:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:30,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:30,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:30,365 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 21:48:30,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:30,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:48:30,411 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 21:48:30,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825159740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:30,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:30,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 21:48:30,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861978460] [2024-11-22 21:48:30,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:30,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:48:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:48:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:48:30,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-22 21:48:30,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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 21:48:30,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:30,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-22 21:48:30,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:30,859 INFO L124 PetriNetUnfolderBase]: 1811/2718 cut-off events. [2024-11-22 21:48:30,860 INFO L125 PetriNetUnfolderBase]: For 2624/2898 co-relation queries the response was YES. [2024-11-22 21:48:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 2718 events. 1811/2718 cut-off events. For 2624/2898 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13186 event pairs, 734 based on Foata normal form. 0/2518 useless extension candidates. Maximal degree in co-relation 6735. Up to 1389 conditions per place. [2024-11-22 21:48:30,875 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 79 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-22 21:48:30,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 520 flow [2024-11-22 21:48:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-22 21:48:30,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-11-22 21:48:30,877 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 174 flow. Second operand 7 states and 150 transitions. [2024-11-22 21:48:30,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 520 flow [2024-11-22 21:48:30,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:30,882 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 210 flow [2024-11-22 21:48:30,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-22 21:48:30,882 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-11-22 21:48:30,882 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 210 flow [2024-11-22 21:48:30,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 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 21:48:30,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:30,882 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:30,893 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 21:48:31,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:31,084 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:31,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1740092478, now seen corresponding path program 1 times [2024-11-22 21:48:31,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:31,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586370251] [2024-11-22 21:48:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:31,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:31,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:31,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586370251] [2024-11-22 21:48:31,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586370251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:31,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405486134] [2024-11-22 21:48:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:31,157 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 21:48:31,157 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 21:48:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:31,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:31,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:31,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:31,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405486134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:31,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:31,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:48:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657202221] [2024-11-22 21:48:31,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:31,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:31,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:31,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:31,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:31,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:31,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:31,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:31,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:31,809 INFO L124 PetriNetUnfolderBase]: 3628/5286 cut-off events. [2024-11-22 21:48:31,809 INFO L125 PetriNetUnfolderBase]: For 6900/7301 co-relation queries the response was YES. [2024-11-22 21:48:31,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16627 conditions, 5286 events. 3628/5286 cut-off events. For 6900/7301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27393 event pairs, 2002 based on Foata normal form. 86/5144 useless extension candidates. Maximal degree in co-relation 9553. Up to 2940 conditions per place. [2024-11-22 21:48:31,888 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-11-22 21:48:31,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 744 flow [2024-11-22 21:48:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-22 21:48:31,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-22 21:48:31,889 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 210 flow. Second operand 8 states and 165 transitions. [2024-11-22 21:48:31,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 744 flow [2024-11-22 21:48:31,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 723 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:31,898 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 296 flow [2024-11-22 21:48:31,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-11-22 21:48:31,898 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-11-22 21:48:31,899 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 296 flow [2024-11-22 21:48:31,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:31,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:31,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:31,909 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 21:48:32,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:32,100 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:32,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1281790510, now seen corresponding path program 1 times [2024-11-22 21:48:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945928327] [2024-11-22 21:48:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:32,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945928327] [2024-11-22 21:48:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945928327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696155677] [2024-11-22 21:48:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:32,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:32,229 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 21:48:32,232 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 21:48:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:32,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:48:32,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:32,396 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 21:48:32,396 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:48:32,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696155677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:32,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:48:32,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-22 21:48:32,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123738746] [2024-11-22 21:48:32,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:32,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:32,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:32,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:32,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:32,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:32,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:32,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:32,875 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-11-22 21:48:32,876 INFO L125 PetriNetUnfolderBase]: For 10587/11050 co-relation queries the response was YES. [2024-11-22 21:48:32,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 4337 events. 2977/4337 cut-off events. For 10587/11050 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21635 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8070. Up to 1920 conditions per place. [2024-11-22 21:48:32,897 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-22 21:48:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 816 flow [2024-11-22 21:48:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-22 21:48:32,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-22 21:48:32,899 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 296 flow. Second operand 6 states and 110 transitions. [2024-11-22 21:48:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 816 flow [2024-11-22 21:48:32,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 801 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:32,906 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 307 flow [2024-11-22 21:48:32,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-11-22 21:48:32,906 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2024-11-22 21:48:32,906 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 307 flow [2024-11-22 21:48:32,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:32,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:32,907 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:32,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:48:33,107 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,SelfDestructingSolverStorable10 [2024-11-22 21:48:33,108 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:33,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1293148760, now seen corresponding path program 1 times [2024-11-22 21:48:33,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:33,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490844074] [2024-11-22 21:48:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:33,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490844074] [2024-11-22 21:48:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490844074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019566609] [2024-11-22 21:48:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:33,197 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 21:48:33,198 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 21:48:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:33,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:48:33,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019566609] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:33,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:33,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-22 21:48:33,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301753000] [2024-11-22 21:48:33,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:33,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:48:33,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:48:33,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:48:33,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:33,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 307 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 21:48:33,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:33,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:33,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:33,898 INFO L124 PetriNetUnfolderBase]: 2677/3909 cut-off events. [2024-11-22 21:48:33,898 INFO L125 PetriNetUnfolderBase]: For 8890/9310 co-relation queries the response was YES. [2024-11-22 21:48:33,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 3909 events. 2677/3909 cut-off events. For 8890/9310 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18596 event pairs, 1549 based on Foata normal form. 54/3960 useless extension candidates. Maximal degree in co-relation 8743. Up to 2459 conditions per place. [2024-11-22 21:48:33,920 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-11-22 21:48:33,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 767 flow [2024-11-22 21:48:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-11-22 21:48:33,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-22 21:48:33,924 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 307 flow. Second operand 8 states and 156 transitions. [2024-11-22 21:48:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 767 flow [2024-11-22 21:48:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 725 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:48:33,934 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 363 flow [2024-11-22 21:48:33,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-11-22 21:48:33,934 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-11-22 21:48:33,935 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 363 flow [2024-11-22 21:48:33,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 21:48:33,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:33,935 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:33,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:34,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:34,136 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:34,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1332811884, now seen corresponding path program 2 times [2024-11-22 21:48:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442651363] [2024-11-22 21:48:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:34,151 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:34,151 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442651363] [2024-11-22 21:48:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442651363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:34,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089180226] [2024-11-22 21:48:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:34,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:34,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:34,393 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:48:34,448 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:34,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:34,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:48:34,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:34,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:48:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:34,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089180226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:34,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:48:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178773044] [2024-11-22 21:48:34,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:34,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:48:34,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:34,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:48:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:48:35,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:35,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 363 flow. Second operand has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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 21:48:35,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:35,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:35,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:35,679 INFO L124 PetriNetUnfolderBase]: 3123/4547 cut-off events. [2024-11-22 21:48:35,679 INFO L125 PetriNetUnfolderBase]: For 11784/12278 co-relation queries the response was YES. [2024-11-22 21:48:35,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 4547 events. 3123/4547 cut-off events. For 11784/12278 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 23111 event pairs, 462 based on Foata normal form. 72/4615 useless extension candidates. Maximal degree in co-relation 9834. Up to 1264 conditions per place. [2024-11-22 21:48:35,717 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 149 selfloop transitions, 22 changer transitions 0/174 dead transitions. [2024-11-22 21:48:35,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 174 transitions, 1354 flow [2024-11-22 21:48:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-11-22 21:48:35,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-11-22 21:48:35,718 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 363 flow. Second operand 9 states and 190 transitions. [2024-11-22 21:48:35,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 174 transitions, 1354 flow [2024-11-22 21:48:35,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 1322 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:35,729 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 450 flow [2024-11-22 21:48:35,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2024-11-22 21:48:35,730 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-22 21:48:35,730 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 450 flow [2024-11-22 21:48:35,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 10.941176470588236) internal successors, (186), 17 states have internal predecessors, (186), 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 21:48:35,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:35,731 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:35,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:35,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:35,935 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:35,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1125410770, now seen corresponding path program 2 times [2024-11-22 21:48:35,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:35,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978040931] [2024-11-22 21:48:35,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:35,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:35,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:35,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:36,118 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 21:48:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978040931] [2024-11-22 21:48:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978040931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205236846] [2024-11-22 21:48:36,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:36,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:36,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:36,121 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:36,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:48:36,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:36,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:36,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:48:36,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:36,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:36,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-22 21:48:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:36,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205236846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:36,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:36,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-22 21:48:36,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357059363] [2024-11-22 21:48:36,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:36,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:48:36,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:48:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:48:36,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:48:36,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 450 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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 21:48:36,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:36,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:48:36,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:37,675 INFO L124 PetriNetUnfolderBase]: 3977/5767 cut-off events. [2024-11-22 21:48:37,676 INFO L125 PetriNetUnfolderBase]: For 17863/18419 co-relation queries the response was YES. [2024-11-22 21:48:37,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22905 conditions, 5767 events. 3977/5767 cut-off events. For 17863/18419 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 28604 event pairs, 614 based on Foata normal form. 257/6015 useless extension candidates. Maximal degree in co-relation 14752. Up to 985 conditions per place. [2024-11-22 21:48:37,699 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 179 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-11-22 21:48:37,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 205 transitions, 1679 flow [2024-11-22 21:48:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:48:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:48:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-11-22 21:48:37,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-11-22 21:48:37,701 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 450 flow. Second operand 14 states and 277 transitions. [2024-11-22 21:48:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 205 transitions, 1679 flow [2024-11-22 21:48:37,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 205 transitions, 1563 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-22 21:48:37,715 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 487 flow [2024-11-22 21:48:37,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=487, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-11-22 21:48:37,716 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-11-22 21:48:37,716 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 487 flow [2024-11-22 21:48:37,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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 21:48:37,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:37,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:37,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:48:37,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:48:37,917 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:37,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1413948225, now seen corresponding path program 1 times [2024-11-22 21:48:37,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:37,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624645373] [2024-11-22 21:48:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:37,969 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 21:48:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:37,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624645373] [2024-11-22 21:48:37,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624645373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:37,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:37,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:37,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059367897] [2024-11-22 21:48:37,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:37,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:37,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:37,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:37,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-22 21:48:37,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 21:48:37,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:37,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-22 21:48:37,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:38,307 INFO L124 PetriNetUnfolderBase]: 3361/5128 cut-off events. [2024-11-22 21:48:38,308 INFO L125 PetriNetUnfolderBase]: For 20269/20833 co-relation queries the response was YES. [2024-11-22 21:48:38,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21316 conditions, 5128 events. 3361/5128 cut-off events. For 20269/20833 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26531 event pairs, 794 based on Foata normal form. 44/5145 useless extension candidates. Maximal degree in co-relation 16352. Up to 4083 conditions per place. [2024-11-22 21:48:38,415 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 68 selfloop transitions, 6 changer transitions 8/90 dead transitions. [2024-11-22 21:48:38,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 90 transitions, 802 flow [2024-11-22 21:48:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:38,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-22 21:48:38,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-22 21:48:38,417 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 487 flow. Second operand 3 states and 74 transitions. [2024-11-22 21:48:38,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 90 transitions, 802 flow [2024-11-22 21:48:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 90 transitions, 722 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-11-22 21:48:38,436 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 418 flow [2024-11-22 21:48:38,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2024-11-22 21:48:38,437 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2024-11-22 21:48:38,437 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 418 flow [2024-11-22 21:48:38,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 21:48:38,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:38,437 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:38,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:48:38,438 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:38,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1733535434, now seen corresponding path program 1 times [2024-11-22 21:48:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:38,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678728664] [2024-11-22 21:48:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:38,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:38,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678728664] [2024-11-22 21:48:38,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678728664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098168223] [2024-11-22 21:48:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:38,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:38,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:38,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:38,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:48:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:38,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:38,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:38,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:38,709 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 21:48:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098168223] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-22 21:48:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135351102] [2024-11-22 21:48:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:38,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:38,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:48:38,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:48:38,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:38,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:48:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:39,408 INFO L124 PetriNetUnfolderBase]: 5423/7844 cut-off events. [2024-11-22 21:48:39,408 INFO L125 PetriNetUnfolderBase]: For 23364/23648 co-relation queries the response was YES. [2024-11-22 21:48:39,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30719 conditions, 7844 events. 5423/7844 cut-off events. For 23364/23648 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 41020 event pairs, 1323 based on Foata normal form. 82/7371 useless extension candidates. Maximal degree in co-relation 23145. Up to 2804 conditions per place. [2024-11-22 21:48:39,444 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 168 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2024-11-22 21:48:39,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 193 transitions, 1721 flow [2024-11-22 21:48:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-11-22 21:48:39,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-22 21:48:39,445 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 418 flow. Second operand 9 states and 165 transitions. [2024-11-22 21:48:39,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 193 transitions, 1721 flow [2024-11-22 21:48:39,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 193 transitions, 1574 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-11-22 21:48:39,481 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 485 flow [2024-11-22 21:48:39,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=485, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-22 21:48:39,482 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 33 predicate places. [2024-11-22 21:48:39,482 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 485 flow [2024-11-22 21:48:39,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:48:39,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:39,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:39,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:48:39,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:48:39,687 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:39,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1758632884, now seen corresponding path program 2 times [2024-11-22 21:48:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866572510] [2024-11-22 21:48:39,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:39,696 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:39,696 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:39,808 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 21:48:39,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866572510] [2024-11-22 21:48:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866572510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032410755] [2024-11-22 21:48:39,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:39,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:39,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:39,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:48:39,876 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:39,876 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:39,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:39,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:39,963 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 21:48:39,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:40,058 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 21:48:40,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032410755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:40,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:40,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 21:48:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277883757] [2024-11-22 21:48:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:40,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:40,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:40,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:48:40,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 485 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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 21:48:40,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:40,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:48:40,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:41,041 INFO L124 PetriNetUnfolderBase]: 8470/12251 cut-off events. [2024-11-22 21:48:41,042 INFO L125 PetriNetUnfolderBase]: For 28983/29271 co-relation queries the response was YES. [2024-11-22 21:48:41,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46665 conditions, 12251 events. 8470/12251 cut-off events. For 28983/29271 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 66720 event pairs, 1145 based on Foata normal form. 120/12172 useless extension candidates. Maximal degree in co-relation 33755. Up to 2642 conditions per place. [2024-11-22 21:48:41,154 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 237 selfloop transitions, 59 changer transitions 0/300 dead transitions. [2024-11-22 21:48:41,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 300 transitions, 2611 flow [2024-11-22 21:48:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:48:41,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:48:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-11-22 21:48:41,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3717532467532468 [2024-11-22 21:48:41,156 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 485 flow. Second operand 14 states and 229 transitions. [2024-11-22 21:48:41,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 300 transitions, 2611 flow [2024-11-22 21:48:41,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 300 transitions, 2608 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:41,223 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 968 flow [2024-11-22 21:48:41,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=968, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-11-22 21:48:41,225 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2024-11-22 21:48:41,226 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 968 flow [2024-11-22 21:48:41,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 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 21:48:41,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:41,226 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:41,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:48:41,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:48:41,427 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:41,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1954374278, now seen corresponding path program 3 times [2024-11-22 21:48:41,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:41,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311096403] [2024-11-22 21:48:41,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:48:41,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:41,448 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:48:41,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:41,567 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 21:48:41,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:41,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311096403] [2024-11-22 21:48:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311096403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:41,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736340583] [2024-11-22 21:48:41,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:48:41,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:41,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:41,570 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:41,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:48:41,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:48:41,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:41,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:41,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:41,694 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 21:48:41,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:41,744 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 21:48:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736340583] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:41,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 21:48:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367647590] [2024-11-22 21:48:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:41,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:41,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:41,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:48:41,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 968 flow. Second operand has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 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 21:48:41,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:48:41,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:43,876 INFO L124 PetriNetUnfolderBase]: 12613/18110 cut-off events. [2024-11-22 21:48:43,876 INFO L125 PetriNetUnfolderBase]: For 69839/70311 co-relation queries the response was YES. [2024-11-22 21:48:43,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81106 conditions, 18110 events. 12613/18110 cut-off events. For 69839/70311 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 103073 event pairs, 1871 based on Foata normal form. 164/18267 useless extension candidates. Maximal degree in co-relation 73735. Up to 5204 conditions per place. [2024-11-22 21:48:43,997 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 271 selfloop transitions, 114 changer transitions 0/389 dead transitions. [2024-11-22 21:48:43,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 389 transitions, 3797 flow [2024-11-22 21:48:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:48:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:48:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 282 transitions. [2024-11-22 21:48:43,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-11-22 21:48:43,999 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 968 flow. Second operand 16 states and 282 transitions. [2024-11-22 21:48:43,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 389 transitions, 3797 flow [2024-11-22 21:48:44,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 389 transitions, 3769 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:44,354 INFO L231 Difference]: Finished difference. Result has 115 places, 179 transitions, 1979 flow [2024-11-22 21:48:44,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1979, PETRI_PLACES=115, PETRI_TRANSITIONS=179} [2024-11-22 21:48:44,359 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-11-22 21:48:44,359 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 179 transitions, 1979 flow [2024-11-22 21:48:44,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.785714285714286) internal successors, (151), 14 states have internal predecessors, (151), 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 21:48:44,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:44,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:44,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:48:44,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:48:44,560 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:44,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash -413689404, now seen corresponding path program 4 times [2024-11-22 21:48:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:44,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881686797] [2024-11-22 21:48:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:44,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:44,573 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:44,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:44,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881686797] [2024-11-22 21:48:44,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881686797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843558739] [2024-11-22 21:48:44,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:44,621 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:44,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:48:44,674 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:44,675 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:44,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:48:44,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:44,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:44,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843558739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:44,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:44,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-22 21:48:44,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132630915] [2024-11-22 21:48:44,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:44,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:48:44,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:44,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:48:44,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:48:44,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-22 21:48:44,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 179 transitions, 1979 flow. Second operand has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 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 21:48:44,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:44,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-22 21:48:44,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:48,607 INFO L124 PetriNetUnfolderBase]: 19303/27433 cut-off events. [2024-11-22 21:48:48,607 INFO L125 PetriNetUnfolderBase]: For 157123/157123 co-relation queries the response was YES. [2024-11-22 21:48:48,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137374 conditions, 27433 events. 19303/27433 cut-off events. For 157123/157123 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 160284 event pairs, 1084 based on Foata normal form. 24/26871 useless extension candidates. Maximal degree in co-relation 123531. Up to 5342 conditions per place. [2024-11-22 21:48:48,821 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 594 selfloop transitions, 580 changer transitions 0/1175 dead transitions. [2024-11-22 21:48:48,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1175 transitions, 14794 flow [2024-11-22 21:48:48,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 21:48:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-22 21:48:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 595 transitions. [2024-11-22 21:48:48,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-22 21:48:48,824 INFO L175 Difference]: Start difference. First operand has 115 places, 179 transitions, 1979 flow. Second operand 35 states and 595 transitions. [2024-11-22 21:48:48,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1175 transitions, 14794 flow [2024-11-22 21:48:49,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 1175 transitions, 14022 flow, removed 172 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:49,871 INFO L231 Difference]: Finished difference. Result has 171 places, 684 transitions, 9721 flow [2024-11-22 21:48:49,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1847, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9721, PETRI_PLACES=171, PETRI_TRANSITIONS=684} [2024-11-22 21:48:49,871 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2024-11-22 21:48:49,872 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 684 transitions, 9721 flow [2024-11-22 21:48:49,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 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 21:48:49,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:49,872 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:49,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:48:50,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:50,077 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:50,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 498706662, now seen corresponding path program 5 times [2024-11-22 21:48:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:50,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476388399] [2024-11-22 21:48:50,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:48:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:50,086 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:50,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:50,151 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 21:48:50,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476388399] [2024-11-22 21:48:50,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476388399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:50,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:50,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:48:50,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624805707] [2024-11-22 21:48:50,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:50,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:50,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:50,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:48:50,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:48:50,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 684 transitions, 9721 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 21:48:50,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:50,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:48:50,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:55,392 INFO L124 PetriNetUnfolderBase]: 18260/26340 cut-off events. [2024-11-22 21:48:55,393 INFO L125 PetriNetUnfolderBase]: For 244288/245425 co-relation queries the response was YES. [2024-11-22 21:48:55,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153093 conditions, 26340 events. 18260/26340 cut-off events. For 244288/245425 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 159173 event pairs, 5006 based on Foata normal form. 212/26258 useless extension candidates. Maximal degree in co-relation 150307. Up to 14472 conditions per place. [2024-11-22 21:48:55,631 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 533 selfloop transitions, 172 changer transitions 7/865 dead transitions. [2024-11-22 21:48:55,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 865 transitions, 12895 flow [2024-11-22 21:48:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-11-22 21:48:55,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-11-22 21:48:55,633 INFO L175 Difference]: Start difference. First operand has 171 places, 684 transitions, 9721 flow. Second operand 7 states and 139 transitions. [2024-11-22 21:48:55,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 865 transitions, 12895 flow [2024-11-22 21:48:58,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 865 transitions, 12614 flow, removed 50 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:58,307 INFO L231 Difference]: Finished difference. Result has 180 places, 699 transitions, 10406 flow [2024-11-22 21:48:58,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9559, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10406, PETRI_PLACES=180, PETRI_TRANSITIONS=699} [2024-11-22 21:48:58,310 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 134 predicate places. [2024-11-22 21:48:58,310 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 699 transitions, 10406 flow [2024-11-22 21:48:58,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 21:48:58,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:58,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:58,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:48:58,311 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:58,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash -309245392, now seen corresponding path program 6 times [2024-11-22 21:48:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327362280] [2024-11-22 21:48:58,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:58,329 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:48:58,330 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327362280] [2024-11-22 21:48:58,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327362280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:58,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846930056] [2024-11-22 21:48:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:58,467 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:58,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:48:58,530 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:48:58,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:58,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:58,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:58,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:58,656 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 21:48:58,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846930056] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:58,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:58,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-22 21:48:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562541702] [2024-11-22 21:48:58,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:58,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:58,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:48:58,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:48:58,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 699 transitions, 10406 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:48:58,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:58,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:48:58,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:03,773 INFO L124 PetriNetUnfolderBase]: 19635/28128 cut-off events. [2024-11-22 21:49:03,773 INFO L125 PetriNetUnfolderBase]: For 258358/259176 co-relation queries the response was YES. [2024-11-22 21:49:04,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165673 conditions, 28128 events. 19635/28128 cut-off events. For 258358/259176 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 169776 event pairs, 3018 based on Foata normal form. 176/28303 useless extension candidates. Maximal degree in co-relation 162326. Up to 7899 conditions per place. [2024-11-22 21:49:04,133 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 460 selfloop transitions, 490 changer transitions 0/960 dead transitions. [2024-11-22 21:49:04,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 960 transitions, 14988 flow [2024-11-22 21:49:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:49:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:49:04,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-11-22 21:49:04,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-22 21:49:04,134 INFO L175 Difference]: Start difference. First operand has 180 places, 699 transitions, 10406 flow. Second operand 9 states and 171 transitions. [2024-11-22 21:49:04,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 960 transitions, 14988 flow [2024-11-22 21:49:07,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 960 transitions, 14741 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-11-22 21:49:07,390 INFO L231 Difference]: Finished difference. Result has 188 places, 781 transitions, 12947 flow [2024-11-22 21:49:07,391 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10176, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12947, PETRI_PLACES=188, PETRI_TRANSITIONS=781} [2024-11-22 21:49:07,391 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 142 predicate places. [2024-11-22 21:49:07,391 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 781 transitions, 12947 flow [2024-11-22 21:49:07,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:49:07,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:07,392 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:07,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:07,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:49:07,592 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:07,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 739920570, now seen corresponding path program 7 times [2024-11-22 21:49:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:07,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750495033] [2024-11-22 21:49:07,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:49:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:07,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750495033] [2024-11-22 21:49:07,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750495033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:07,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421332063] [2024-11-22 21:49:07,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:49:07,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:07,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:07,709 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:07,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:49:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:07,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:07,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:07,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:07,893 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 21:49:07,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421332063] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:07,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:07,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-22 21:49:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024889115] [2024-11-22 21:49:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:07,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:49:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:49:07,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:49:07,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:49:07,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 781 transitions, 12947 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:49:07,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:07,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:49:07,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:13,008 INFO L124 PetriNetUnfolderBase]: 19563/28013 cut-off events. [2024-11-22 21:49:13,008 INFO L125 PetriNetUnfolderBase]: For 313946/314598 co-relation queries the response was YES. [2024-11-22 21:49:13,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169985 conditions, 28013 events. 19563/28013 cut-off events. For 313946/314598 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 168479 event pairs, 2240 based on Foata normal form. 168/28180 useless extension candidates. Maximal degree in co-relation 168629. Up to 10117 conditions per place. [2024-11-22 21:49:13,406 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 333 selfloop transitions, 567 changer transitions 0/910 dead transitions. [2024-11-22 21:49:13,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 910 transitions, 15724 flow [2024-11-22 21:49:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-11-22 21:49:13,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-11-22 21:49:13,407 INFO L175 Difference]: Start difference. First operand has 188 places, 781 transitions, 12947 flow. Second operand 8 states and 149 transitions. [2024-11-22 21:49:13,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 910 transitions, 15724 flow [2024-11-22 21:49:16,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 910 transitions, 15549 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:16,557 INFO L231 Difference]: Finished difference. Result has 194 places, 783 transitions, 14549 flow [2024-11-22 21:49:16,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12690, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14549, PETRI_PLACES=194, PETRI_TRANSITIONS=783} [2024-11-22 21:49:16,558 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2024-11-22 21:49:16,558 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 783 transitions, 14549 flow [2024-11-22 21:49:16,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:49:16,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:16,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:16,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:49:16,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:16,763 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:16,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1839356394, now seen corresponding path program 8 times [2024-11-22 21:49:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:16,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359394123] [2024-11-22 21:49:16,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:16,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:16,780 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359394123] [2024-11-22 21:49:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359394123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983066421] [2024-11-22 21:49:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:16,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:16,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:16,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:49:16,924 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:16,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:16,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:16,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:16,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:17,060 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 21:49:17,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983066421] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:17,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:17,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-22 21:49:17,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228025985] [2024-11-22 21:49:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:17,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:49:17,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:49:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:49:17,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-22 21:49:17,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 783 transitions, 14549 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:49:17,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:17,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-22 21:49:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:22,125 INFO L124 PetriNetUnfolderBase]: 19535/27947 cut-off events. [2024-11-22 21:49:22,125 INFO L125 PetriNetUnfolderBase]: For 374731/375390 co-relation queries the response was YES. [2024-11-22 21:49:22,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179744 conditions, 27947 events. 19535/27947 cut-off events. For 374731/375390 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 167850 event pairs, 2929 based on Foata normal form. 171/28117 useless extension candidates. Maximal degree in co-relation 178800. Up to 13857 conditions per place. [2024-11-22 21:49:22,594 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 449 selfloop transitions, 421 changer transitions 0/880 dead transitions. [2024-11-22 21:49:22,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 880 transitions, 17060 flow [2024-11-22 21:49:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-11-22 21:49:22,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-11-22 21:49:22,595 INFO L175 Difference]: Start difference. First operand has 194 places, 783 transitions, 14549 flow. Second operand 8 states and 148 transitions. [2024-11-22 21:49:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 880 transitions, 17060 flow [2024-11-22 21:49:26,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 880 transitions, 16857 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-11-22 21:49:26,134 INFO L231 Difference]: Finished difference. Result has 194 places, 782 transitions, 15184 flow [2024-11-22 21:49:26,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14342, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15184, PETRI_PLACES=194, PETRI_TRANSITIONS=782} [2024-11-22 21:49:26,135 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2024-11-22 21:49:26,135 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 782 transitions, 15184 flow [2024-11-22 21:49:26,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 21:49:26,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:26,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:26,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:26,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:26,340 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:26,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1231333878, now seen corresponding path program 1 times [2024-11-22 21:49:26,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:26,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414840305] [2024-11-22 21:49:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414840305] [2024-11-22 21:49:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414840305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247226390] [2024-11-22 21:49:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:26,402 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:26,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:49:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:26,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:49:26,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:26,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:26,525 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 21:49:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247226390] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:26,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:26,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-22 21:49:26,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819942263] [2024-11-22 21:49:26,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:26,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:49:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:49:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:49:26,533 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:49:26,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 782 transitions, 15184 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:26,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:26,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:49:26,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:30,500 INFO L124 PetriNetUnfolderBase]: 16000/23426 cut-off events. [2024-11-22 21:49:30,500 INFO L125 PetriNetUnfolderBase]: For 407509/409980 co-relation queries the response was YES. [2024-11-22 21:49:30,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155264 conditions, 23426 events. 16000/23426 cut-off events. For 407509/409980 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 148528 event pairs, 3024 based on Foata normal form. 1679/24561 useless extension candidates. Maximal degree in co-relation 151646. Up to 12474 conditions per place. [2024-11-22 21:49:30,751 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 651 selfloop transitions, 14 changer transitions 0/952 dead transitions. [2024-11-22 21:49:30,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 952 transitions, 20303 flow [2024-11-22 21:49:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:49:30,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:49:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-22 21:49:30,752 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-22 21:49:30,752 INFO L175 Difference]: Start difference. First operand has 194 places, 782 transitions, 15184 flow. Second operand 5 states and 88 transitions. [2024-11-22 21:49:30,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 952 transitions, 20303 flow [2024-11-22 21:49:33,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 952 transitions, 19696 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-22 21:49:33,413 INFO L231 Difference]: Finished difference. Result has 192 places, 766 transitions, 14525 flow [2024-11-22 21:49:33,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14497, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=14525, PETRI_PLACES=192, PETRI_TRANSITIONS=766} [2024-11-22 21:49:33,414 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 146 predicate places. [2024-11-22 21:49:33,415 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 766 transitions, 14525 flow [2024-11-22 21:49:33,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:33,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:33,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:33,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 21:49:33,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-22 21:49:33,619 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:33,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2143161195, now seen corresponding path program 1 times [2024-11-22 21:49:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537500194] [2024-11-22 21:49:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:33,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:34,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537500194] [2024-11-22 21:49:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537500194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:34,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429788788] [2024-11-22 21:49:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:49:34,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:34,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:34,206 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:34,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:49:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:34,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:49:34,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:34,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:34,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:49:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:34,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:34,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 21:49:34,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:49:34,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2024-11-22 21:49:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429788788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:34,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:34,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-22 21:49:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752232050] [2024-11-22 21:49:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:34,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-22 21:49:34,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-22 21:49:34,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-11-22 21:49:34,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:49:34,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 766 transitions, 14525 flow. Second operand has 24 states, 24 states have (on average 11.208333333333334) internal successors, (269), 24 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:34,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:34,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:49:34,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:40,306 INFO L124 PetriNetUnfolderBase]: 16709/24476 cut-off events. [2024-11-22 21:49:40,306 INFO L125 PetriNetUnfolderBase]: For 350817/352529 co-relation queries the response was YES. [2024-11-22 21:49:40,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159230 conditions, 24476 events. 16709/24476 cut-off events. For 350817/352529 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 153696 event pairs, 3512 based on Foata normal form. 318/24521 useless extension candidates. Maximal degree in co-relation 155980. Up to 20362 conditions per place. [2024-11-22 21:49:40,622 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 821 selfloop transitions, 197 changer transitions 1/1221 dead transitions. [2024-11-22 21:49:40,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1221 transitions, 23831 flow [2024-11-22 21:49:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-22 21:49:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-22 21:49:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 320 transitions. [2024-11-22 21:49:40,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3827751196172249 [2024-11-22 21:49:40,624 INFO L175 Difference]: Start difference. First operand has 192 places, 766 transitions, 14525 flow. Second operand 19 states and 320 transitions. [2024-11-22 21:49:40,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1221 transitions, 23831 flow [2024-11-22 21:49:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1221 transitions, 23773 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:49:43,800 INFO L231 Difference]: Finished difference. Result has 214 places, 970 transitions, 18566 flow [2024-11-22 21:49:43,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14497, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=18566, PETRI_PLACES=214, PETRI_TRANSITIONS=970} [2024-11-22 21:49:43,801 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 168 predicate places. [2024-11-22 21:49:43,801 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 970 transitions, 18566 flow [2024-11-22 21:49:43,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.208333333333334) internal successors, (269), 24 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:43,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:43,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:43,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 21:49:44,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:44,003 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:44,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash 406382739, now seen corresponding path program 2 times [2024-11-22 21:49:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:44,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135503556] [2024-11-22 21:49:44,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:44,028 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:44,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:44,302 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 21:49:44,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135503556] [2024-11-22 21:49:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135503556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184363861] [2024-11-22 21:49:44,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:44,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:44,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:44,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:44,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:49:44,376 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:44,377 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:44,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:49:44,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:44,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:44,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:49:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:44,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:44,767 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 21:49:44,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184363861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:44,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:44,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-11-22 21:49:44,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136325952] [2024-11-22 21:49:44,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:44,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:49:44,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:44,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:49:44,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:49:44,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:49:44,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 970 transitions, 18566 flow. Second operand has 25 states, 25 states have (on average 11.32) internal successors, (283), 25 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:44,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:44,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:49:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:51,099 INFO L124 PetriNetUnfolderBase]: 19497/28837 cut-off events. [2024-11-22 21:49:51,099 INFO L125 PetriNetUnfolderBase]: For 409963/412187 co-relation queries the response was YES. [2024-11-22 21:49:51,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188797 conditions, 28837 events. 19497/28837 cut-off events. For 409963/412187 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 189566 event pairs, 2684 based on Foata normal form. 401/29039 useless extension candidates. Maximal degree in co-relation 184824. Up to 21743 conditions per place. [2024-11-22 21:49:51,493 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 862 selfloop transitions, 328 changer transitions 1/1340 dead transitions. [2024-11-22 21:49:51,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1340 transitions, 25947 flow [2024-11-22 21:49:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:49:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:49:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 251 transitions. [2024-11-22 21:49:51,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3803030303030303 [2024-11-22 21:49:51,495 INFO L175 Difference]: Start difference. First operand has 214 places, 970 transitions, 18566 flow. Second operand 15 states and 251 transitions. [2024-11-22 21:49:51,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1340 transitions, 25947 flow [2024-11-22 21:49:55,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1340 transitions, 25760 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:55,620 INFO L231 Difference]: Finished difference. Result has 233 places, 1145 transitions, 22448 flow [2024-11-22 21:49:55,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18463, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22448, PETRI_PLACES=233, PETRI_TRANSITIONS=1145} [2024-11-22 21:49:55,621 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 187 predicate places. [2024-11-22 21:49:55,621 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 1145 transitions, 22448 flow [2024-11-22 21:49:55,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.32) internal successors, (283), 25 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:55,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:55,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:49:55,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-22 21:49:55,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:55,822 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:55,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1744161187, now seen corresponding path program 3 times [2024-11-22 21:49:55,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:55,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280697570] [2024-11-22 21:49:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:49:55,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:55,832 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:49:55,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:56,108 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 21:49:56,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:56,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280697570] [2024-11-22 21:49:56,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280697570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:56,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474001739] [2024-11-22 21:49:56,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:49:56,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:56,110 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:56,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:49:56,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:49:56,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:56,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:49:56,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:56,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:49:56,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:49:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:56,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:56,519 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 21:49:56,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474001739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:49:56,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:49:56,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2024-11-22 21:49:56,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742839340] [2024-11-22 21:49:56,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:49:56,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:49:56,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:49:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:49:56,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-22 21:49:56,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 1145 transitions, 22448 flow. Second operand has 25 states, 25 states have (on average 11.32) internal successors, (283), 25 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:56,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:56,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-22 21:49:56,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand