./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.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 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:36:28,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:36:28,424 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:36:28,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:36:28,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:36:28,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:36:28,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:36:28,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:36:28,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:36:28,475 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:36:28,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:36:28,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:36:28,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:36:28,478 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:36:28,478 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:36:28,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:36:28,479 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:36:28,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:36:28,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:36:28,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:36:28,479 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:36:28,483 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:36:28,484 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:36:28,484 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:36:28,484 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:36:28,484 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:36:28,485 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:36:28,485 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:36:28,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:36:28,485 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:36:28,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:36:28,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:36:28,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:36:28,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:28,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:36:28,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:36:28,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:36:28,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:36:28,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:36:28,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:36:28,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:36:28,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:36:28,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2024-11-17 03:36:28,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:36:28,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:36:28,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:36:28,792 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:36:28,793 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:36:28,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-17 03:36:30,281 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:36:30,462 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:36:30,463 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2024-11-17 03:36:30,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967c91092/c2431975e5734083b832bc91db0d8b0b/FLAG7f91384a5 [2024-11-17 03:36:30,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967c91092/c2431975e5734083b832bc91db0d8b0b [2024-11-17 03:36:30,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:36:30,490 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:36:30,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:30,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:36:30,497 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:36:30,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6443671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30, skipping insertion in model container [2024-11-17 03:36:30,499 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:36:30,750 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:36:30,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:30,762 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:36:30,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:36:30,811 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:36:30,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30 WrapperNode [2024-11-17 03:36:30,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:36:30,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:30,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:36:30,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:36:30,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,851 INFO L138 Inliner]: procedures = 25, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 131 [2024-11-17 03:36:30,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:36:30,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:36:30,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:36:30,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:36:30,864 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,867 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,883 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-17 03:36:30,884 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,884 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,890 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,891 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:36:30,897 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:36:30,897 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:36:30,897 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:36:30,898 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (1/1) ... [2024-11-17 03:36:30,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:36:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:30,937 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) [2024-11-17 03:36:30,942 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 [2024-11-17 03:36:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:36:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:36:30,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:36:30,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:36:30,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:36:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:36:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:36:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:36:30,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:36:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:36:30,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:36:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:36:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:36:30,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:36:30,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:36:30,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:36:30,998 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:36:31,118 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:36:31,120 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:36:31,460 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:36:31,460 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:36:31,720 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:36:31,720 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:36:31,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:31 BoogieIcfgContainer [2024-11-17 03:36:31,721 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:36:31,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:36:31,725 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:36:31,729 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:36:31,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:30" (1/3) ... [2024-11-17 03:36:31,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c26b498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:31, skipping insertion in model container [2024-11-17 03:36:31,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:30" (2/3) ... [2024-11-17 03:36:31,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c26b498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:31, skipping insertion in model container [2024-11-17 03:36:31,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:36:31" (3/3) ... [2024-11-17 03:36:31,734 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2024-11-17 03:36:31,751 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:36:31,751 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-17 03:36:31,752 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:36:31,872 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:36:31,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 98 flow [2024-11-17 03:36:31,956 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2024-11-17 03:36:31,957 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:36:31,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 64 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-17 03:36:31,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 98 flow [2024-11-17 03:36:31,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 39 transitions, 90 flow [2024-11-17 03:36:31,975 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:36:31,981 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;@c9a5e23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:36:31,981 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-17 03:36:31,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:36:31,985 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:36:31,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:36:31,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:31,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:31,986 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:31,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 12503244, now seen corresponding path program 1 times [2024-11-17 03:36:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975275363] [2024-11-17 03:36:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:32,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:32,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975275363] [2024-11-17 03:36:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975275363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:32,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:36:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806720856] [2024-11-17 03:36:32,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:32,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:36:32,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:36:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:36:32,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-11-17 03:36:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-17 03:36:32,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:32,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-11-17 03:36:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:32,450 INFO L124 PetriNetUnfolderBase]: 128/266 cut-off events. [2024-11-17 03:36:32,450 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-17 03:36:32,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 266 events. 128/266 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1310 event pairs, 100 based on Foata normal form. 29/222 useless extension candidates. Maximal degree in co-relation 459. Up to 221 conditions per place. [2024-11-17 03:36:32,457 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 21 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-17 03:36:32,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 124 flow [2024-11-17 03:36:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:36:32,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:36:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-17 03:36:32,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-11-17 03:36:32,471 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 90 flow. Second operand 3 states and 67 transitions. [2024-11-17 03:36:32,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 124 flow [2024-11-17 03:36:32,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:32,476 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 74 flow [2024-11-17 03:36:32,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-17 03:36:32,484 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-17 03:36:32,484 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 74 flow [2024-11-17 03:36:32,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-11-17 03:36:32,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:32,485 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:36:32,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:36:32,486 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:32,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash 12503245, now seen corresponding path program 1 times [2024-11-17 03:36:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:32,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117066628] [2024-11-17 03:36:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117066628] [2024-11-17 03:36:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117066628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183706937] [2024-11-17 03:36:32,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:32,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:32,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-11-17 03:36:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-11-17 03:36:32,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:32,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-11-17 03:36:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:33,005 INFO L124 PetriNetUnfolderBase]: 129/271 cut-off events. [2024-11-17 03:36:33,005 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:36:33,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 271 events. 129/271 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1337 event pairs, 100 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 485. Up to 226 conditions per place. [2024-11-17 03:36:33,009 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 23 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-17 03:36:33,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 136 flow [2024-11-17 03:36:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-17 03:36:33,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-17 03:36:33,012 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 74 flow. Second operand 4 states and 80 transitions. [2024-11-17 03:36:33,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 136 flow [2024-11-17 03:36:33,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:33,016 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 97 flow [2024-11-17 03:36:33,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-17 03:36:33,017 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-17 03:36:33,018 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 97 flow [2024-11-17 03:36:33,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-11-17 03:36:33,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:33,019 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:36:33,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:36:33,020 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:33,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1177604649, now seen corresponding path program 1 times [2024-11-17 03:36:33,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897375568] [2024-11-17 03:36:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:33,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897375568] [2024-11-17 03:36:33,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897375568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107844464] [2024-11-17 03:36:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:33,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:33,451 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) [2024-11-17 03:36:33,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:36:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:33,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:36:33,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:33,612 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 [2024-11-17 03:36:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:33,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:34,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107844464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:34,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:34,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:36:34,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367611205] [2024-11-17 03:36:34,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:34,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:36:34,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:36:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:36:34,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-11-17 03:36:34,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 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) [2024-11-17 03:36:34,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:34,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-11-17 03:36:34,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:34,543 INFO L124 PetriNetUnfolderBase]: 129/270 cut-off events. [2024-11-17 03:36:34,544 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-17 03:36:34,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 270 events. 129/270 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1308 event pairs, 100 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 495. Up to 222 conditions per place. [2024-11-17 03:36:34,548 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 21 selfloop transitions, 7 changer transitions 0/36 dead transitions. [2024-11-17 03:36:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 151 flow [2024-11-17 03:36:34,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:36:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:36:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-11-17 03:36:34,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-11-17 03:36:34,552 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 97 flow. Second operand 6 states and 101 transitions. [2024-11-17 03:36:34,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 151 flow [2024-11-17 03:36:34,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:34,555 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 104 flow [2024-11-17 03:36:34,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-11-17 03:36:34,556 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-11-17 03:36:34,557 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 104 flow [2024-11-17 03:36:34,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 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) [2024-11-17 03:36:34,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:34,558 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:34,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:34,761 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 [2024-11-17 03:36:34,762 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:34,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2047573365, now seen corresponding path program 1 times [2024-11-17 03:36:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:34,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542718446] [2024-11-17 03:36:34,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:34,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:34,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:34,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542718446] [2024-11-17 03:36:34,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542718446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:34,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:34,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:34,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806272677] [2024-11-17 03:36:34,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:34,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:36:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:36:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:36:34,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-11-17 03:36:34,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-17 03:36:34,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:34,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-11-17 03:36:34,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:34,917 INFO L124 PetriNetUnfolderBase]: 93/203 cut-off events. [2024-11-17 03:36:34,918 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-17 03:36:34,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 203 events. 93/203 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 865 event pairs, 68 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 366. Up to 160 conditions per place. [2024-11-17 03:36:34,920 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 21 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-11-17 03:36:34,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 148 flow [2024-11-17 03:36:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:36:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:36:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-17 03:36:34,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-17 03:36:34,922 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 104 flow. Second operand 4 states and 75 transitions. [2024-11-17 03:36:34,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 148 flow [2024-11-17 03:36:34,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 125 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-17 03:36:34,925 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 83 flow [2024-11-17 03:36:34,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2024-11-17 03:36:34,926 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-17 03:36:34,926 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 83 flow [2024-11-17 03:36:34,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-17 03:36:34,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:34,927 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:34,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:36:34,927 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:34,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2047573366, now seen corresponding path program 1 times [2024-11-17 03:36:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:34,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194985734] [2024-11-17 03:36:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194985734] [2024-11-17 03:36:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194985734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:34,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:36:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482616390] [2024-11-17 03:36:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:34,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:35,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-11-17 03:36:35,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 83 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) [2024-11-17 03:36:35,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:35,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-11-17 03:36:35,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:35,141 INFO L124 PetriNetUnfolderBase]: 154/350 cut-off events. [2024-11-17 03:36:35,141 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-17 03:36:35,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 654 conditions, 350 events. 154/350 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1673 event pairs, 106 based on Foata normal form. 12/305 useless extension candidates. Maximal degree in co-relation 408. Up to 193 conditions per place. [2024-11-17 03:36:35,144 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2024-11-17 03:36:35,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 232 flow [2024-11-17 03:36:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:36:35,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:36:35,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-11-17 03:36:35,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-17 03:36:35,146 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 83 flow. Second operand 6 states and 122 transitions. [2024-11-17 03:36:35,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 232 flow [2024-11-17 03:36:35,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:35,148 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 113 flow [2024-11-17 03:36:35,148 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-17 03:36:35,149 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-11-17 03:36:35,149 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 113 flow [2024-11-17 03:36:35,149 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) [2024-11-17 03:36:35,149 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:35,149 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:35,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:36:35,150 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:35,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 613019820, now seen corresponding path program 1 times [2024-11-17 03:36:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:35,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232643460] [2024-11-17 03:36:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:35,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:35,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:35,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232643460] [2024-11-17 03:36:35,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232643460] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:35,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:35,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:36:35,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856665235] [2024-11-17 03:36:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:35,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:36:35,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-11-17 03:36:35,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-17 03:36:35,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:35,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-11-17 03:36:35,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:35,343 INFO L124 PetriNetUnfolderBase]: 130/290 cut-off events. [2024-11-17 03:36:35,343 INFO L125 PetriNetUnfolderBase]: For 85/97 co-relation queries the response was YES. [2024-11-17 03:36:35,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 290 events. 130/290 cut-off events. For 85/97 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1353 event pairs, 96 based on Foata normal form. 7/267 useless extension candidates. Maximal degree in co-relation 441. Up to 191 conditions per place. [2024-11-17 03:36:35,345 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-17 03:36:35,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 236 flow [2024-11-17 03:36:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:36:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:36:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-17 03:36:35,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-11-17 03:36:35,350 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 113 flow. Second operand 6 states and 115 transitions. [2024-11-17 03:36:35,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 236 flow [2024-11-17 03:36:35,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:36:35,352 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 138 flow [2024-11-17 03:36:35,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=138, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-11-17 03:36:35,354 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-11-17 03:36:35,354 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 138 flow [2024-11-17 03:36:35,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2024-11-17 03:36:35,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:35,355 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:35,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:36:35,357 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:35,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:35,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1434627756, now seen corresponding path program 1 times [2024-11-17 03:36:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135141890] [2024-11-17 03:36:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:35,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:35,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:35,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135141890] [2024-11-17 03:36:35,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135141890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:35,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691116249] [2024-11-17 03:36:35,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:35,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:35,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:35,534 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) [2024-11-17 03:36:35,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:36:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:35,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:36:35,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:35,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:35,765 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 [2024-11-17 03:36:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:35,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691116249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:35,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:35,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-17 03:36:35,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881708524] [2024-11-17 03:36:35,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:35,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:36:35,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:36:35,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:36:35,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:35,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 138 flow. Second operand has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 11 states have internal predecessors, (170), 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) [2024-11-17 03:36:35,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:35,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:35,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:36,088 INFO L124 PetriNetUnfolderBase]: 160/359 cut-off events. [2024-11-17 03:36:36,088 INFO L125 PetriNetUnfolderBase]: For 156/171 co-relation queries the response was YES. [2024-11-17 03:36:36,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 359 events. 160/359 cut-off events. For 156/171 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1719 event pairs, 75 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 610. Up to 142 conditions per place. [2024-11-17 03:36:36,091 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-11-17 03:36:36,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 314 flow [2024-11-17 03:36:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:36:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:36:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-11-17 03:36:36,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-11-17 03:36:36,093 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 138 flow. Second operand 7 states and 153 transitions. [2024-11-17 03:36:36,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 314 flow [2024-11-17 03:36:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 307 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:36:36,098 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 172 flow [2024-11-17 03:36:36,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=172, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2024-11-17 03:36:36,099 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2024-11-17 03:36:36,099 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 172 flow [2024-11-17 03:36:36,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.454545454545455) internal successors, (170), 11 states have internal predecessors, (170), 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) [2024-11-17 03:36:36,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:36,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:36,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:36:36,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-17 03:36:36,301 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:36,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash -17191838, now seen corresponding path program 1 times [2024-11-17 03:36:36,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:36,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315691488] [2024-11-17 03:36:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:36,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:36,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:36,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315691488] [2024-11-17 03:36:36,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315691488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397185868] [2024-11-17 03:36:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:36,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:36,462 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) [2024-11-17 03:36:36,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:36:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:36,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:36:36,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:36,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:36,690 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 [2024-11-17 03:36:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:36,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397185868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:36,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:36,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-17 03:36:36,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256016611] [2024-11-17 03:36:36,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:36,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:36:36,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:36:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:36:36,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:36,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 172 flow. Second operand has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:36,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:36,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:36,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:37,061 INFO L124 PetriNetUnfolderBase]: 223/491 cut-off events. [2024-11-17 03:36:37,061 INFO L125 PetriNetUnfolderBase]: For 541/565 co-relation queries the response was YES. [2024-11-17 03:36:37,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 491 events. 223/491 cut-off events. For 541/565 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2411 event pairs, 100 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 1060. Up to 205 conditions per place. [2024-11-17 03:36:37,065 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-11-17 03:36:37,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 71 transitions, 422 flow [2024-11-17 03:36:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:36:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:36:37,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-11-17 03:36:37,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-11-17 03:36:37,066 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 172 flow. Second operand 7 states and 151 transitions. [2024-11-17 03:36:37,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 71 transitions, 422 flow [2024-11-17 03:36:37,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 406 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:37,070 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 201 flow [2024-11-17 03:36:37,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=201, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-17 03:36:37,070 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-11-17 03:36:37,071 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 201 flow [2024-11-17 03:36:37,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:36:37,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:37,071 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:37,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:36:37,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:37,276 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:37,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:37,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1656421448, now seen corresponding path program 1 times [2024-11-17 03:36:37,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:37,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326461549] [2024-11-17 03:36:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:37,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:37,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:37,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326461549] [2024-11-17 03:36:37,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326461549] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:37,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944465297] [2024-11-17 03:36:37,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:37,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:37,365 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) [2024-11-17 03:36:37,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:36:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:37,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:36:37,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:37,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:37,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944465297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:37,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:37,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:36:37,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592996100] [2024-11-17 03:36:37,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:37,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:37,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:37,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:37,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:37,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:37,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 201 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 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) [2024-11-17 03:36:37,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:37,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:38,053 INFO L124 PetriNetUnfolderBase]: 541/1077 cut-off events. [2024-11-17 03:36:38,054 INFO L125 PetriNetUnfolderBase]: For 1379/1401 co-relation queries the response was YES. [2024-11-17 03:36:38,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3177 conditions, 1077 events. 541/1077 cut-off events. For 1379/1401 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5849 event pairs, 231 based on Foata normal form. 16/1069 useless extension candidates. Maximal degree in co-relation 1689. Up to 408 conditions per place. [2024-11-17 03:36:38,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 19 changer transitions 0/119 dead transitions. [2024-11-17 03:36:38,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 784 flow [2024-11-17 03:36:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:36:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:36:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-11-17 03:36:38,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-17 03:36:38,065 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 201 flow. Second operand 12 states and 217 transitions. [2024-11-17 03:36:38,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 784 flow [2024-11-17 03:36:38,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 119 transitions, 757 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:38,073 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 314 flow [2024-11-17 03:36:38,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=314, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2024-11-17 03:36:38,074 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-11-17 03:36:38,074 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 314 flow [2024-11-17 03:36:38,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 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) [2024-11-17 03:36:38,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:38,075 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:38,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:38,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:38,276 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:38,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1484054910, now seen corresponding path program 1 times [2024-11-17 03:36:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399289806] [2024-11-17 03:36:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:38,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399289806] [2024-11-17 03:36:38,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399289806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269883296] [2024-11-17 03:36:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:38,400 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) [2024-11-17 03:36:38,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:36:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:38,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:36:38,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:38,572 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:38,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269883296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:38,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:38,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:36:38,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474052864] [2024-11-17 03:36:38,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:38,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:38,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:38,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 54 transitions, 314 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 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) [2024-11-17 03:36:38,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:38,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:38,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:39,065 INFO L124 PetriNetUnfolderBase]: 466/911 cut-off events. [2024-11-17 03:36:39,066 INFO L125 PetriNetUnfolderBase]: For 2166/2222 co-relation queries the response was YES. [2024-11-17 03:36:39,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3023 conditions, 911 events. 466/911 cut-off events. For 2166/2222 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4798 event pairs, 218 based on Foata normal form. 11/912 useless extension candidates. Maximal degree in co-relation 1740. Up to 404 conditions per place. [2024-11-17 03:36:39,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-11-17 03:36:39,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 811 flow [2024-11-17 03:36:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:36:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:36:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-11-17 03:36:39,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-11-17 03:36:39,079 INFO L175 Difference]: Start difference. First operand has 70 places, 54 transitions, 314 flow. Second operand 12 states and 209 transitions. [2024-11-17 03:36:39,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 811 flow [2024-11-17 03:36:39,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 780 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-17 03:36:39,087 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 388 flow [2024-11-17 03:36:39,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=388, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2024-11-17 03:36:39,088 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 42 predicate places. [2024-11-17 03:36:39,088 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 388 flow [2024-11-17 03:36:39,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 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) [2024-11-17 03:36:39,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:39,089 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:39,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-17 03:36:39,289 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,SelfDestructingSolverStorable9 [2024-11-17 03:36:39,290 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:39,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash 108667474, now seen corresponding path program 2 times [2024-11-17 03:36:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:39,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268469823] [2024-11-17 03:36:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:39,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:39,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:39,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268469823] [2024-11-17 03:36:39,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268469823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:39,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348417892] [2024-11-17 03:36:39,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:36:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:39,586 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) [2024-11-17 03:36:39,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:36:39,659 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:36:39,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:39,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:36:39,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:39,672 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 [2024-11-17 03:36:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:39,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348417892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:40,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:36:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388179850] [2024-11-17 03:36:40,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:40,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:36:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:40,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:36:40,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:36:40,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-11-17 03:36:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 388 flow. Second operand has 21 states, 21 states have (on average 14.619047619047619) internal successors, (307), 21 states have internal predecessors, (307), 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) [2024-11-17 03:36:40,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:40,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-11-17 03:36:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:40,699 INFO L124 PetriNetUnfolderBase]: 380/864 cut-off events. [2024-11-17 03:36:40,700 INFO L125 PetriNetUnfolderBase]: For 1964/1992 co-relation queries the response was YES. [2024-11-17 03:36:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 864 events. 380/864 cut-off events. For 1964/1992 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4691 event pairs, 134 based on Foata normal form. 16/855 useless extension candidates. Maximal degree in co-relation 1842. Up to 215 conditions per place. [2024-11-17 03:36:40,708 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 83 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2024-11-17 03:36:40,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 856 flow [2024-11-17 03:36:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:36:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:36:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-11-17 03:36:40,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-17 03:36:40,710 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 388 flow. Second operand 10 states and 210 transitions. [2024-11-17 03:36:40,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 856 flow [2024-11-17 03:36:40,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 820 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:40,718 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 442 flow [2024-11-17 03:36:40,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=442, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2024-11-17 03:36:40,718 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-11-17 03:36:40,718 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 442 flow [2024-11-17 03:36:40,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 14.619047619047619) internal successors, (307), 21 states have internal predecessors, (307), 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) [2024-11-17 03:36:40,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:40,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:40,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:40,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:40,920 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:40,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:40,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1116132347, now seen corresponding path program 1 times [2024-11-17 03:36:40,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:40,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589007596] [2024-11-17 03:36:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:40,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:40,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:40,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589007596] [2024-11-17 03:36:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589007596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:36:40,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:36:40,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:36:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684115746] [2024-11-17 03:36:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:40,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:36:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:40,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:36:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:36:40,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:40,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2024-11-17 03:36:40,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:40,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:40,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:41,107 INFO L124 PetriNetUnfolderBase]: 400/929 cut-off events. [2024-11-17 03:36:41,107 INFO L125 PetriNetUnfolderBase]: For 2608/2627 co-relation queries the response was YES. [2024-11-17 03:36:41,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3408 conditions, 929 events. 400/929 cut-off events. For 2608/2627 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5284 event pairs, 106 based on Foata normal form. 3/919 useless extension candidates. Maximal degree in co-relation 2168. Up to 530 conditions per place. [2024-11-17 03:36:41,115 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 55 selfloop transitions, 4 changer transitions 7/80 dead transitions. [2024-11-17 03:36:41,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 683 flow [2024-11-17 03:36:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:36:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:36:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-17 03:36:41,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-17 03:36:41,117 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 442 flow. Second operand 3 states and 75 transitions. [2024-11-17 03:36:41,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 683 flow [2024-11-17 03:36:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 80 transitions, 651 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:41,124 INFO L231 Difference]: Finished difference. Result has 87 places, 61 transitions, 404 flow [2024-11-17 03:36:41,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=87, PETRI_TRANSITIONS=61} [2024-11-17 03:36:41,127 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 47 predicate places. [2024-11-17 03:36:41,127 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 61 transitions, 404 flow [2024-11-17 03:36:41,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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) [2024-11-17 03:36:41,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:41,127 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:41,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:36:41,128 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:41,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 151170312, now seen corresponding path program 2 times [2024-11-17 03:36:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:41,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909700789] [2024-11-17 03:36:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:41,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:41,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:41,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909700789] [2024-11-17 03:36:41,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909700789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:41,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450544082] [2024-11-17 03:36:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:36:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:41,372 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) [2024-11-17 03:36:41,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:36:41,443 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:36:41,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:41,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:36:41,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:41,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:41,740 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 [2024-11-17 03:36:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450544082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:41,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-17 03:36:41,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192802496] [2024-11-17 03:36:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:36:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:36:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:36:41,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:41,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 61 transitions, 404 flow. Second operand has 21 states, 21 states have (on average 15.904761904761905) internal successors, (334), 21 states have internal predecessors, (334), 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) [2024-11-17 03:36:41,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:41,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:41,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:42,464 INFO L124 PetriNetUnfolderBase]: 461/1039 cut-off events. [2024-11-17 03:36:42,464 INFO L125 PetriNetUnfolderBase]: For 2926/2942 co-relation queries the response was YES. [2024-11-17 03:36:42,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3762 conditions, 1039 events. 461/1039 cut-off events. For 2926/2942 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5984 event pairs, 176 based on Foata normal form. 19/1034 useless extension candidates. Maximal degree in co-relation 2751. Up to 304 conditions per place. [2024-11-17 03:36:42,473 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 91 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-11-17 03:36:42,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1020 flow [2024-11-17 03:36:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:36:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:36:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-11-17 03:36:42,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-17 03:36:42,475 INFO L175 Difference]: Start difference. First operand has 87 places, 61 transitions, 404 flow. Second operand 10 states and 215 transitions. [2024-11-17 03:36:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1020 flow [2024-11-17 03:36:42,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 984 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:42,488 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 467 flow [2024-11-17 03:36:42,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=467, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2024-11-17 03:36:42,489 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 49 predicate places. [2024-11-17 03:36:42,489 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 467 flow [2024-11-17 03:36:42,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 15.904761904761905) internal successors, (334), 21 states have internal predecessors, (334), 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) [2024-11-17 03:36:42,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:42,490 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:42,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:36:42,690 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 [2024-11-17 03:36:42,691 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:42,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash 501492974, now seen corresponding path program 3 times [2024-11-17 03:36:42,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:42,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741870856] [2024-11-17 03:36:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:42,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:42,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:42,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741870856] [2024-11-17 03:36:42,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741870856] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:42,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169092375] [2024-11-17 03:36:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:36:42,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:42,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:42,826 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) [2024-11-17 03:36:42,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:36:42,890 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:36:42,890 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:42,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:36:42,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:36:43,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:43,269 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 13 treesize of output 11 [2024-11-17 03:36:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:36:43,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169092375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:43,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:43,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-17 03:36:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917863490] [2024-11-17 03:36:43,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:43,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:36:43,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:36:43,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:36:43,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:43,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 467 flow. Second operand has 22 states, 22 states have (on average 13.0) internal successors, (286), 22 states have internal predecessors, (286), 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) [2024-11-17 03:36:43,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:43,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:43,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:44,576 INFO L124 PetriNetUnfolderBase]: 1121/2153 cut-off events. [2024-11-17 03:36:44,577 INFO L125 PetriNetUnfolderBase]: For 6417/6427 co-relation queries the response was YES. [2024-11-17 03:36:44,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 2153 events. 1121/2153 cut-off events. For 6417/6427 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13045 event pairs, 221 based on Foata normal form. 44/2184 useless extension candidates. Maximal degree in co-relation 4449. Up to 314 conditions per place. [2024-11-17 03:36:44,599 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 233 selfloop transitions, 39 changer transitions 3/283 dead transitions. [2024-11-17 03:36:44,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 283 transitions, 2658 flow [2024-11-17 03:36:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:36:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:36:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 383 transitions. [2024-11-17 03:36:44,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4342403628117914 [2024-11-17 03:36:44,603 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 467 flow. Second operand 21 states and 383 transitions. [2024-11-17 03:36:44,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 283 transitions, 2658 flow [2024-11-17 03:36:44,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 283 transitions, 2483 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-11-17 03:36:44,622 INFO L231 Difference]: Finished difference. Result has 107 places, 82 transitions, 679 flow [2024-11-17 03:36:44,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=679, PETRI_PLACES=107, PETRI_TRANSITIONS=82} [2024-11-17 03:36:44,623 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 67 predicate places. [2024-11-17 03:36:44,623 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 82 transitions, 679 flow [2024-11-17 03:36:44,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.0) internal successors, (286), 22 states have internal predecessors, (286), 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) [2024-11-17 03:36:44,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:44,625 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:44,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:44,825 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 [2024-11-17 03:36:44,826 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:44,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1059135268, now seen corresponding path program 3 times [2024-11-17 03:36:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:44,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579439808] [2024-11-17 03:36:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579439808] [2024-11-17 03:36:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579439808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602145831] [2024-11-17 03:36:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:36:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:44,995 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) [2024-11-17 03:36:44,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:36:45,067 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:36:45,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:45,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:36:45,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:45,077 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 [2024-11-17 03:36:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:36:45,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:45,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:36:45,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602145831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:45,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:45,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-17 03:36:45,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549769032] [2024-11-17 03:36:45,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:45,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:36:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:36:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:36:45,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:45,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 82 transitions, 679 flow. Second operand has 23 states, 23 states have (on average 13.304347826086957) internal successors, (306), 23 states have internal predecessors, (306), 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) [2024-11-17 03:36:45,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:45,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:45,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:46,598 INFO L124 PetriNetUnfolderBase]: 963/1837 cut-off events. [2024-11-17 03:36:46,599 INFO L125 PetriNetUnfolderBase]: For 8715/8743 co-relation queries the response was YES. [2024-11-17 03:36:46,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7743 conditions, 1837 events. 963/1837 cut-off events. For 8715/8743 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10787 event pairs, 195 based on Foata normal form. 32/1863 useless extension candidates. Maximal degree in co-relation 4463. Up to 269 conditions per place. [2024-11-17 03:36:46,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 195 selfloop transitions, 39 changer transitions 3/251 dead transitions. [2024-11-17 03:36:46,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 251 transitions, 2674 flow [2024-11-17 03:36:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:36:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:36:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 359 transitions. [2024-11-17 03:36:46,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4070294784580499 [2024-11-17 03:36:46,623 INFO L175 Difference]: Start difference. First operand has 107 places, 82 transitions, 679 flow. Second operand 21 states and 359 transitions. [2024-11-17 03:36:46,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 251 transitions, 2674 flow [2024-11-17 03:36:46,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 251 transitions, 2451 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-11-17 03:36:46,638 INFO L231 Difference]: Finished difference. Result has 123 places, 95 transitions, 821 flow [2024-11-17 03:36:46,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=821, PETRI_PLACES=123, PETRI_TRANSITIONS=95} [2024-11-17 03:36:46,639 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-11-17 03:36:46,639 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 95 transitions, 821 flow [2024-11-17 03:36:46,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.304347826086957) internal successors, (306), 23 states have internal predecessors, (306), 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) [2024-11-17 03:36:46,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:46,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:46,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:46,840 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,SelfDestructingSolverStorable14 [2024-11-17 03:36:46,841 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:46,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash -129869401, now seen corresponding path program 1 times [2024-11-17 03:36:46,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:46,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181092944] [2024-11-17 03:36:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:46,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:46,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:46,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181092944] [2024-11-17 03:36:46,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181092944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:46,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279273705] [2024-11-17 03:36:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:46,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:46,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:46,916 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) [2024-11-17 03:36:46,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:36:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:46,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:36:46,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:47,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279273705] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:47,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:36:47,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-17 03:36:47,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38562354] [2024-11-17 03:36:47,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:47,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:36:47,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:47,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 95 transitions, 821 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-17 03:36:47,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:47,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:47,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:47,288 INFO L124 PetriNetUnfolderBase]: 827/1659 cut-off events. [2024-11-17 03:36:47,288 INFO L125 PetriNetUnfolderBase]: For 7591/7603 co-relation queries the response was YES. [2024-11-17 03:36:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7261 conditions, 1659 events. 827/1659 cut-off events. For 7591/7603 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9812 event pairs, 291 based on Foata normal form. 52/1691 useless extension candidates. Maximal degree in co-relation 4439. Up to 745 conditions per place. [2024-11-17 03:36:47,304 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 89 selfloop transitions, 13 changer transitions 0/116 dead transitions. [2024-11-17 03:36:47,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 116 transitions, 1211 flow [2024-11-17 03:36:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-11-17 03:36:47,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-11-17 03:36:47,305 INFO L175 Difference]: Start difference. First operand has 123 places, 95 transitions, 821 flow. Second operand 5 states and 86 transitions. [2024-11-17 03:36:47,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 116 transitions, 1211 flow [2024-11-17 03:36:47,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 1154 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-11-17 03:36:47,352 INFO L231 Difference]: Finished difference. Result has 114 places, 89 transitions, 737 flow [2024-11-17 03:36:47,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=737, PETRI_PLACES=114, PETRI_TRANSITIONS=89} [2024-11-17 03:36:47,353 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 74 predicate places. [2024-11-17 03:36:47,353 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 89 transitions, 737 flow [2024-11-17 03:36:47,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-17 03:36:47,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:47,353 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:47,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:47,556 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,SelfDestructingSolverStorable15 [2024-11-17 03:36:47,557 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:47,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash -437685761, now seen corresponding path program 1 times [2024-11-17 03:36:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974997079] [2024-11-17 03:36:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:47,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974997079] [2024-11-17 03:36:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974997079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098649393] [2024-11-17 03:36:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:47,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:47,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:47,645 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) [2024-11-17 03:36:47,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:36:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:47,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:36:47,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:47,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:47,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098649393] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:47,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:36:47,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-17 03:36:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612111571] [2024-11-17 03:36:47,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:36:47,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:36:47,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:36:47,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:36:47,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:47,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 89 transitions, 737 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-17 03:36:47,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:47,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:47,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:47,968 INFO L124 PetriNetUnfolderBase]: 752/1581 cut-off events. [2024-11-17 03:36:47,968 INFO L125 PetriNetUnfolderBase]: For 6810/6817 co-relation queries the response was YES. [2024-11-17 03:36:47,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 1581 events. 752/1581 cut-off events. For 6810/6817 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9305 event pairs, 265 based on Foata normal form. 46/1610 useless extension candidates. Maximal degree in co-relation 4080. Up to 687 conditions per place. [2024-11-17 03:36:47,983 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 84 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-11-17 03:36:47,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 108 transitions, 1096 flow [2024-11-17 03:36:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:36:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:36:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-17 03:36:47,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-11-17 03:36:47,985 INFO L175 Difference]: Start difference. First operand has 114 places, 89 transitions, 737 flow. Second operand 5 states and 87 transitions. [2024-11-17 03:36:47,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 108 transitions, 1096 flow [2024-11-17 03:36:47,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 1050 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:48,000 INFO L231 Difference]: Finished difference. Result has 110 places, 83 transitions, 681 flow [2024-11-17 03:36:48,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=681, PETRI_PLACES=110, PETRI_TRANSITIONS=83} [2024-11-17 03:36:48,001 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 70 predicate places. [2024-11-17 03:36:48,001 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 83 transitions, 681 flow [2024-11-17 03:36:48,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2024-11-17 03:36:48,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:48,002 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:48,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:48,202 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,SelfDestructingSolverStorable16 [2024-11-17 03:36:48,203 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:48,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:48,203 INFO L85 PathProgramCache]: Analyzing trace with hash -59312241, now seen corresponding path program 1 times [2024-11-17 03:36:48,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31463268] [2024-11-17 03:36:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:48,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:48,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:48,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31463268] [2024-11-17 03:36:48,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31463268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:48,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782373987] [2024-11-17 03:36:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:48,633 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) [2024-11-17 03:36:48,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-17 03:36:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:48,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:36:48,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:48,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:48,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:48,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-17 03:36:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782373987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:48,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2024-11-17 03:36:48,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793471307] [2024-11-17 03:36:48,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:48,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:48,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:48,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:48,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 83 transitions, 681 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-17 03:36:48,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:48,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:48,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:49,253 INFO L124 PetriNetUnfolderBase]: 656/1635 cut-off events. [2024-11-17 03:36:49,253 INFO L125 PetriNetUnfolderBase]: For 6140/6151 co-relation queries the response was YES. [2024-11-17 03:36:49,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6742 conditions, 1635 events. 656/1635 cut-off events. For 6140/6151 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11206 event pairs, 163 based on Foata normal form. 6/1613 useless extension candidates. Maximal degree in co-relation 3707. Up to 833 conditions per place. [2024-11-17 03:36:49,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 46 changer transitions 18/169 dead transitions. [2024-11-17 03:36:49,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 1681 flow [2024-11-17 03:36:49,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:36:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:36:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-11-17 03:36:49,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47835497835497837 [2024-11-17 03:36:49,272 INFO L175 Difference]: Start difference. First operand has 110 places, 83 transitions, 681 flow. Second operand 11 states and 221 transitions. [2024-11-17 03:36:49,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 1681 flow [2024-11-17 03:36:49,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1625 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:49,290 INFO L231 Difference]: Finished difference. Result has 123 places, 118 transitions, 1135 flow [2024-11-17 03:36:49,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1135, PETRI_PLACES=123, PETRI_TRANSITIONS=118} [2024-11-17 03:36:49,293 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 83 predicate places. [2024-11-17 03:36:49,293 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 118 transitions, 1135 flow [2024-11-17 03:36:49,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-17 03:36:49,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:49,294 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:49,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-17 03:36:49,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-17 03:36:49,494 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:49,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:49,495 INFO L85 PathProgramCache]: Analyzing trace with hash -25933759, now seen corresponding path program 2 times [2024-11-17 03:36:49,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:49,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681647868] [2024-11-17 03:36:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:49,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681647868] [2024-11-17 03:36:49,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681647868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:49,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805190824] [2024-11-17 03:36:49,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:36:49,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:49,934 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) [2024-11-17 03:36:49,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-17 03:36:50,010 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:36:50,010 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:50,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:36:50,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:50,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:50,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:50,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-17 03:36:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:50,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805190824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:50,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:50,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-17 03:36:50,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131579022] [2024-11-17 03:36:50,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:50,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:36:50,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:36:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:36:50,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:50,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 118 transitions, 1135 flow. Second operand has 15 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 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) [2024-11-17 03:36:50,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:50,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:50,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:50,662 INFO L124 PetriNetUnfolderBase]: 776/1963 cut-off events. [2024-11-17 03:36:50,662 INFO L125 PetriNetUnfolderBase]: For 9227/9283 co-relation queries the response was YES. [2024-11-17 03:36:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8661 conditions, 1963 events. 776/1963 cut-off events. For 9227/9283 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14363 event pairs, 132 based on Foata normal form. 38/1973 useless extension candidates. Maximal degree in co-relation 8204. Up to 879 conditions per place. [2024-11-17 03:36:50,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 79 changer transitions 19/203 dead transitions. [2024-11-17 03:36:50,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 203 transitions, 2280 flow [2024-11-17 03:36:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:36:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:36:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-11-17 03:36:50,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-11-17 03:36:50,688 INFO L175 Difference]: Start difference. First operand has 123 places, 118 transitions, 1135 flow. Second operand 12 states and 242 transitions. [2024-11-17 03:36:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 203 transitions, 2280 flow [2024-11-17 03:36:50,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 203 transitions, 2226 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:50,718 INFO L231 Difference]: Finished difference. Result has 138 places, 151 transitions, 1759 flow [2024-11-17 03:36:50,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1759, PETRI_PLACES=138, PETRI_TRANSITIONS=151} [2024-11-17 03:36:50,719 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 98 predicate places. [2024-11-17 03:36:50,720 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 151 transitions, 1759 flow [2024-11-17 03:36:50,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 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) [2024-11-17 03:36:50,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:50,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:50,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:36:50,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:50,925 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:50,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash -172982001, now seen corresponding path program 3 times [2024-11-17 03:36:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:50,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890314218] [2024-11-17 03:36:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:51,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890314218] [2024-11-17 03:36:51,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890314218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616204118] [2024-11-17 03:36:51,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:36:51,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:51,270 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) [2024-11-17 03:36:51,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:36:51,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:36:51,342 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:51,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:36:51,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:51,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:51,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:51,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-17 03:36:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616204118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:51,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:51,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 12 [2024-11-17 03:36:51,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965804776] [2024-11-17 03:36:51,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:51,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:36:51,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:51,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:36:51,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:36:51,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:51,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 151 transitions, 1759 flow. Second operand has 13 states, 13 states have (on average 17.076923076923077) internal successors, (222), 13 states have internal predecessors, (222), 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) [2024-11-17 03:36:51,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:51,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:51,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:52,102 INFO L124 PetriNetUnfolderBase]: 841/2115 cut-off events. [2024-11-17 03:36:52,103 INFO L125 PetriNetUnfolderBase]: For 13050/13125 co-relation queries the response was YES. [2024-11-17 03:36:52,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10143 conditions, 2115 events. 841/2115 cut-off events. For 13050/13125 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15769 event pairs, 192 based on Foata normal form. 37/2104 useless extension candidates. Maximal degree in co-relation 9627. Up to 1231 conditions per place. [2024-11-17 03:36:52,124 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 44 changer transitions 14/199 dead transitions. [2024-11-17 03:36:52,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2594 flow [2024-11-17 03:36:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:36:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:36:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-11-17 03:36:52,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-17 03:36:52,126 INFO L175 Difference]: Start difference. First operand has 138 places, 151 transitions, 1759 flow. Second operand 9 states and 180 transitions. [2024-11-17 03:36:52,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2594 flow [2024-11-17 03:36:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 199 transitions, 2428 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-11-17 03:36:52,168 INFO L231 Difference]: Finished difference. Result has 144 places, 165 transitions, 1950 flow [2024-11-17 03:36:52,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1950, PETRI_PLACES=144, PETRI_TRANSITIONS=165} [2024-11-17 03:36:52,171 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 104 predicate places. [2024-11-17 03:36:52,171 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 165 transitions, 1950 flow [2024-11-17 03:36:52,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.076923076923077) internal successors, (222), 13 states have internal predecessors, (222), 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) [2024-11-17 03:36:52,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:52,172 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:52,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:36:52,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:52,376 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:52,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:52,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1910573421, now seen corresponding path program 4 times [2024-11-17 03:36:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:52,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624980415] [2024-11-17 03:36:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:52,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:52,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624980415] [2024-11-17 03:36:52,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624980415] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:52,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345724801] [2024-11-17 03:36:52,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:36:52,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:52,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:52,736 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) [2024-11-17 03:36:52,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:36:52,814 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:36:52,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:52,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:36:52,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:52,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:52,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:52,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-17 03:36:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:52,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345724801] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:52,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:52,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-17 03:36:52,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442051348] [2024-11-17 03:36:52,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:52,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:36:52,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:52,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:36:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:36:53,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:53,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 165 transitions, 1950 flow. Second operand has 15 states, 15 states have (on average 16.4) internal successors, (246), 15 states have internal predecessors, (246), 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) [2024-11-17 03:36:53,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:53,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:53,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:53,577 INFO L124 PetriNetUnfolderBase]: 899/2250 cut-off events. [2024-11-17 03:36:53,578 INFO L125 PetriNetUnfolderBase]: For 14387/14450 co-relation queries the response was YES. [2024-11-17 03:36:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10879 conditions, 2250 events. 899/2250 cut-off events. For 14387/14450 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17049 event pairs, 136 based on Foata normal form. 39/2256 useless extension candidates. Maximal degree in co-relation 10109. Up to 929 conditions per place. [2024-11-17 03:36:53,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 101 changer transitions 19/238 dead transitions. [2024-11-17 03:36:53,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 238 transitions, 3123 flow [2024-11-17 03:36:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-17 03:36:53,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-17 03:36:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-11-17 03:36:53,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-11-17 03:36:53,597 INFO L175 Difference]: Start difference. First operand has 144 places, 165 transitions, 1950 flow. Second operand 12 states and 241 transitions. [2024-11-17 03:36:53,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 238 transitions, 3123 flow [2024-11-17 03:36:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 3039 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-17 03:36:53,639 INFO L231 Difference]: Finished difference. Result has 157 places, 187 transitions, 2540 flow [2024-11-17 03:36:53,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2540, PETRI_PLACES=157, PETRI_TRANSITIONS=187} [2024-11-17 03:36:53,640 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-11-17 03:36:53,640 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 187 transitions, 2540 flow [2024-11-17 03:36:53,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.4) internal successors, (246), 15 states have internal predecessors, (246), 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) [2024-11-17 03:36:53,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:53,641 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:53,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:36:53,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:53,842 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:53,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -464656159, now seen corresponding path program 5 times [2024-11-17 03:36:53,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:53,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770097685] [2024-11-17 03:36:53,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:53,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:54,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770097685] [2024-11-17 03:36:54,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770097685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:54,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56359729] [2024-11-17 03:36:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:36:54,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:54,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:54,190 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) [2024-11-17 03:36:54,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:36:54,265 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-17 03:36:54,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:54,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:36:54,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:54,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:54,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:54,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2024-11-17 03:36:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56359729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:54,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2024-11-17 03:36:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522170612] [2024-11-17 03:36:54,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:54,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:54,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:54,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 187 transitions, 2540 flow. Second operand has 14 states, 14 states have (on average 16.857142857142858) internal successors, (236), 14 states have internal predecessors, (236), 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) [2024-11-17 03:36:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:55,009 INFO L124 PetriNetUnfolderBase]: 957/2420 cut-off events. [2024-11-17 03:36:55,009 INFO L125 PetriNetUnfolderBase]: For 19546/19651 co-relation queries the response was YES. [2024-11-17 03:36:55,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12488 conditions, 2420 events. 957/2420 cut-off events. For 19546/19651 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19092 event pairs, 200 based on Foata normal form. 27/2399 useless extension candidates. Maximal degree in co-relation 11453. Up to 1339 conditions per place. [2024-11-17 03:36:55,027 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 63 changer transitions 15/242 dead transitions. [2024-11-17 03:36:55,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 242 transitions, 3610 flow [2024-11-17 03:36:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:36:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:36:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-11-17 03:36:55,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-17 03:36:55,029 INFO L175 Difference]: Start difference. First operand has 157 places, 187 transitions, 2540 flow. Second operand 10 states and 200 transitions. [2024-11-17 03:36:55,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 242 transitions, 3610 flow [2024-11-17 03:36:55,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 242 transitions, 3345 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-11-17 03:36:55,084 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 2816 flow [2024-11-17 03:36:55,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2816, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-11-17 03:36:55,085 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-11-17 03:36:55,085 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 2816 flow [2024-11-17 03:36:55,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.857142857142858) internal successors, (236), 14 states have internal predecessors, (236), 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) [2024-11-17 03:36:55,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:55,086 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:55,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:36:55,290 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,SelfDestructingSolverStorable21 [2024-11-17 03:36:55,291 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:55,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:55,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2100784109, now seen corresponding path program 6 times [2024-11-17 03:36:55,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:55,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989589698] [2024-11-17 03:36:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:55,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989589698] [2024-11-17 03:36:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989589698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619617955] [2024-11-17 03:36:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-17 03:36:55,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:55,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:55,614 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) [2024-11-17 03:36:55,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:36:55,688 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-17 03:36:55,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:55,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:36:55,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:55,769 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:55,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:36:55,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-17 03:36:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:36:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619617955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:55,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2024-11-17 03:36:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015317646] [2024-11-17 03:36:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:55,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:36:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:36:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:36:55,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-17 03:36:55,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 2816 flow. Second operand has 15 states, 15 states have (on average 16.4) internal successors, (246), 15 states have internal predecessors, (246), 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) [2024-11-17 03:36:55,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:55,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-17 03:36:55,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:56,561 INFO L124 PetriNetUnfolderBase]: 1083/2679 cut-off events. [2024-11-17 03:36:56,561 INFO L125 PetriNetUnfolderBase]: For 22672/22824 co-relation queries the response was YES. [2024-11-17 03:36:56,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14140 conditions, 2679 events. 1083/2679 cut-off events. For 22672/22824 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21468 event pairs, 166 based on Foata normal form. 38/2703 useless extension candidates. Maximal degree in co-relation 11957. Up to 1263 conditions per place. [2024-11-17 03:36:56,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 101 changer transitions 28/297 dead transitions. [2024-11-17 03:36:56,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 297 transitions, 4503 flow [2024-11-17 03:36:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:36:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:36:56,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-11-17 03:36:56,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.467687074829932 [2024-11-17 03:36:56,589 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 2816 flow. Second operand 14 states and 275 transitions. [2024-11-17 03:36:56,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 297 transitions, 4503 flow [2024-11-17 03:36:56,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 297 transitions, 4331 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-11-17 03:36:56,664 INFO L231 Difference]: Finished difference. Result has 173 places, 234 transitions, 3413 flow [2024-11-17 03:36:56,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3413, PETRI_PLACES=173, PETRI_TRANSITIONS=234} [2024-11-17 03:36:56,665 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 133 predicate places. [2024-11-17 03:36:56,665 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 234 transitions, 3413 flow [2024-11-17 03:36:56,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.4) internal successors, (246), 15 states have internal predecessors, (246), 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) [2024-11-17 03:36:56,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:56,666 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:56,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-17 03:36:56,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:56,870 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:56,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 877783701, now seen corresponding path program 7 times [2024-11-17 03:36:56,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:56,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466229540] [2024-11-17 03:36:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:56,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466229540] [2024-11-17 03:36:56,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466229540] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:56,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370033153] [2024-11-17 03:36:56,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-17 03:36:56,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:56,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:56,964 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) [2024-11-17 03:36:56,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:36:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:57,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:36:57,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:57,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:57,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370033153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:57,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:36:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388507228] [2024-11-17 03:36:57,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:57,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:57,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:57,291 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:57,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 234 transitions, 3413 flow. Second operand has 14 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 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) [2024-11-17 03:36:57,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:57,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:57,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:57,679 INFO L124 PetriNetUnfolderBase]: 1151/2495 cut-off events. [2024-11-17 03:36:57,679 INFO L125 PetriNetUnfolderBase]: For 22636/22791 co-relation queries the response was YES. [2024-11-17 03:36:57,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13469 conditions, 2495 events. 1151/2495 cut-off events. For 22636/22791 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18002 event pairs, 215 based on Foata normal form. 196/2672 useless extension candidates. Maximal degree in co-relation 12748. Up to 943 conditions per place. [2024-11-17 03:36:57,698 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 206 selfloop transitions, 57 changer transitions 0/273 dead transitions. [2024-11-17 03:36:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 273 transitions, 4304 flow [2024-11-17 03:36:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:36:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:36:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-11-17 03:36:57,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-11-17 03:36:57,699 INFO L175 Difference]: Start difference. First operand has 173 places, 234 transitions, 3413 flow. Second operand 9 states and 152 transitions. [2024-11-17 03:36:57,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 273 transitions, 4304 flow [2024-11-17 03:36:57,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 273 transitions, 3722 flow, removed 129 selfloop flow, removed 20 redundant places. [2024-11-17 03:36:57,751 INFO L231 Difference]: Finished difference. Result has 156 places, 232 transitions, 3011 flow [2024-11-17 03:36:57,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3011, PETRI_PLACES=156, PETRI_TRANSITIONS=232} [2024-11-17 03:36:57,752 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 116 predicate places. [2024-11-17 03:36:57,752 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 232 transitions, 3011 flow [2024-11-17 03:36:57,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 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) [2024-11-17 03:36:57,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:57,752 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:57,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-17 03:36:57,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:57,953 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:57,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:57,953 INFO L85 PathProgramCache]: Analyzing trace with hash 917926571, now seen corresponding path program 8 times [2024-11-17 03:36:57,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:57,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998893272] [2024-11-17 03:36:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:57,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:36:58,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:58,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:36:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998893272] [2024-11-17 03:36:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998893272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:36:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594919295] [2024-11-17 03:36:58,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:36:58,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:36:58,054 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) [2024-11-17 03:36:58,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-17 03:36:58,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:36:58,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:36:58,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:36:58,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:36:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:58,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:36:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:36:58,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594919295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:36:58,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:36:58,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:36:58,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773505326] [2024-11-17 03:36:58,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:36:58,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:36:58,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:36:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:36:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:36:58,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-11-17 03:36:58,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 232 transitions, 3011 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-11-17 03:36:58,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:36:58,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-11-17 03:36:58,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:36:58,775 INFO L124 PetriNetUnfolderBase]: 900/1946 cut-off events. [2024-11-17 03:36:58,775 INFO L125 PetriNetUnfolderBase]: For 14242/14372 co-relation queries the response was YES. [2024-11-17 03:36:58,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 1946 events. 900/1946 cut-off events. For 14242/14372 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12787 event pairs, 190 based on Foata normal form. 152/2082 useless extension candidates. Maximal degree in co-relation 8215. Up to 687 conditions per place. [2024-11-17 03:36:58,796 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 55 changer transitions 0/263 dead transitions. [2024-11-17 03:36:58,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 263 transitions, 3839 flow [2024-11-17 03:36:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:36:58,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:36:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-11-17 03:36:58,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-11-17 03:36:58,798 INFO L175 Difference]: Start difference. First operand has 156 places, 232 transitions, 3011 flow. Second operand 9 states and 149 transitions. [2024-11-17 03:36:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 263 transitions, 3839 flow [2024-11-17 03:36:58,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 263 transitions, 3625 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-11-17 03:36:58,849 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2965 flow [2024-11-17 03:36:58,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2965, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-11-17 03:36:58,850 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 117 predicate places. [2024-11-17 03:36:58,850 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2965 flow [2024-11-17 03:36:58,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-11-17 03:36:58,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:36:58,850 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:36:58,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-17 03:36:59,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:36:59,051 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:36:59,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:36:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1664095579, now seen corresponding path program 9 times [2024-11-17 03:36:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:36:59,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061702788] [2024-11-17 03:36:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:36:59,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:36:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:00,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:00,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061702788] [2024-11-17 03:37:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061702788] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575082665] [2024-11-17 03:37:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:37:00,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:00,033 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:00,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 03:37:00,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-17 03:37:00,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:00,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-17 03:37:00,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:00,125 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 [2024-11-17 03:37:00,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:00,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2024-11-17 03:37:00,811 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 19 treesize of output 15 [2024-11-17 03:37:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:37:01,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:01,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:01,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 63 [2024-11-17 03:37:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:37:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575082665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:02,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:02,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 45 [2024-11-17 03:37:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116062152] [2024-11-17 03:37:02,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:02,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-17 03:37:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:02,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-17 03:37:02,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2024-11-17 03:37:02,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-11-17 03:37:02,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2965 flow. Second operand has 46 states, 46 states have (on average 9.869565217391305) internal successors, (454), 46 states have internal predecessors, (454), 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) [2024-11-17 03:37:02,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:02,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-11-17 03:37:02,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:06,325 INFO L124 PetriNetUnfolderBase]: 2353/4478 cut-off events. [2024-11-17 03:37:06,326 INFO L125 PetriNetUnfolderBase]: For 29587/29587 co-relation queries the response was YES. [2024-11-17 03:37:06,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21904 conditions, 4478 events. 2353/4478 cut-off events. For 29587/29587 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29885 event pairs, 95 based on Foata normal form. 2/4480 useless extension candidates. Maximal degree in co-relation 18292. Up to 1485 conditions per place. [2024-11-17 03:37:06,362 INFO L140 encePairwiseOnDemand]: 24/42 looper letters, 237 selfloop transitions, 391 changer transitions 45/677 dead transitions. [2024-11-17 03:37:06,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 677 transitions, 8355 flow [2024-11-17 03:37:06,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-17 03:37:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-11-17 03:37:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 852 transitions. [2024-11-17 03:37:06,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.302771855010661 [2024-11-17 03:37:06,365 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2965 flow. Second operand 67 states and 852 transitions. [2024-11-17 03:37:06,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 677 transitions, 8355 flow [2024-11-17 03:37:06,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 677 transitions, 8173 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:37:06,426 INFO L231 Difference]: Finished difference. Result has 239 places, 488 transitions, 7190 flow [2024-11-17 03:37:06,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=7190, PETRI_PLACES=239, PETRI_TRANSITIONS=488} [2024-11-17 03:37:06,426 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 199 predicate places. [2024-11-17 03:37:06,427 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 488 transitions, 7190 flow [2024-11-17 03:37:06,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 9.869565217391305) internal successors, (454), 46 states have internal predecessors, (454), 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) [2024-11-17 03:37:06,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:06,427 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:06,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:06,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-17 03:37:06,628 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:06,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2087346457, now seen corresponding path program 10 times [2024-11-17 03:37:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785453572] [2024-11-17 03:37:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:07,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785453572] [2024-11-17 03:37:07,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785453572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:07,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743069714] [2024-11-17 03:37:07,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:37:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:07,362 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:07,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 03:37:07,436 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:37:07,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:07,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 03:37:07,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:07,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:07,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:07,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-11-17 03:37:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743069714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:07,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:07,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2024-11-17 03:37:07,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705005627] [2024-11-17 03:37:07,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:07,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 03:37:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 03:37:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2024-11-17 03:37:08,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:08,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 488 transitions, 7190 flow. Second operand has 33 states, 33 states have (on average 11.363636363636363) internal successors, (375), 33 states have internal predecessors, (375), 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) [2024-11-17 03:37:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:10,396 INFO L124 PetriNetUnfolderBase]: 3009/5676 cut-off events. [2024-11-17 03:37:10,396 INFO L125 PetriNetUnfolderBase]: For 54618/54618 co-relation queries the response was YES. [2024-11-17 03:37:10,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33988 conditions, 5676 events. 3009/5676 cut-off events. For 54618/54618 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 38573 event pairs, 250 based on Foata normal form. 3/5679 useless extension candidates. Maximal degree in co-relation 33627. Up to 2492 conditions per place. [2024-11-17 03:37:10,441 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 447 selfloop transitions, 349 changer transitions 14/814 dead transitions. [2024-11-17 03:37:10,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 814 transitions, 12610 flow [2024-11-17 03:37:10,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-17 03:37:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-17 03:37:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 554 transitions. [2024-11-17 03:37:10,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3664021164021164 [2024-11-17 03:37:10,443 INFO L175 Difference]: Start difference. First operand has 239 places, 488 transitions, 7190 flow. Second operand 36 states and 554 transitions. [2024-11-17 03:37:10,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 814 transitions, 12610 flow [2024-11-17 03:37:10,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 814 transitions, 11486 flow, removed 398 selfloop flow, removed 22 redundant places. [2024-11-17 03:37:10,701 INFO L231 Difference]: Finished difference. Result has 267 places, 631 transitions, 9493 flow [2024-11-17 03:37:10,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9493, PETRI_PLACES=267, PETRI_TRANSITIONS=631} [2024-11-17 03:37:10,701 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 227 predicate places. [2024-11-17 03:37:10,702 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 631 transitions, 9493 flow [2024-11-17 03:37:10,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.363636363636363) internal successors, (375), 33 states have internal predecessors, (375), 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) [2024-11-17 03:37:10,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:10,702 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:10,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-17 03:37:10,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-17 03:37:10,903 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:10,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1824757477, now seen corresponding path program 11 times [2024-11-17 03:37:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845409978] [2024-11-17 03:37:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845409978] [2024-11-17 03:37:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845409978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768389679] [2024-11-17 03:37:11,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:37:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:11,798 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:11,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-17 03:37:11,869 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-17 03:37:11,869 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:11,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 03:37:11,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:12,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:12,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:12,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-11-17 03:37:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:12,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768389679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:12,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:12,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 30 [2024-11-17 03:37:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256350723] [2024-11-17 03:37:12,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:12,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-17 03:37:12,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-17 03:37:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2024-11-17 03:37:12,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:12,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 631 transitions, 9493 flow. Second operand has 31 states, 31 states have (on average 11.451612903225806) internal successors, (355), 31 states have internal predecessors, (355), 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) [2024-11-17 03:37:12,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:12,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:12,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:14,840 INFO L124 PetriNetUnfolderBase]: 3442/6469 cut-off events. [2024-11-17 03:37:14,840 INFO L125 PetriNetUnfolderBase]: For 71272/71272 co-relation queries the response was YES. [2024-11-17 03:37:14,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40668 conditions, 6469 events. 3442/6469 cut-off events. For 71272/71272 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 44419 event pairs, 320 based on Foata normal form. 3/6472 useless extension candidates. Maximal degree in co-relation 40253. Up to 3576 conditions per place. [2024-11-17 03:37:14,886 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 510 selfloop transitions, 314 changer transitions 30/858 dead transitions. [2024-11-17 03:37:14,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 858 transitions, 13979 flow [2024-11-17 03:37:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-17 03:37:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-17 03:37:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 446 transitions. [2024-11-17 03:37:14,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2024-11-17 03:37:14,887 INFO L175 Difference]: Start difference. First operand has 267 places, 631 transitions, 9493 flow. Second operand 28 states and 446 transitions. [2024-11-17 03:37:14,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 858 transitions, 13979 flow [2024-11-17 03:37:15,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 858 transitions, 13577 flow, removed 129 selfloop flow, removed 15 redundant places. [2024-11-17 03:37:15,154 INFO L231 Difference]: Finished difference. Result has 289 places, 688 transitions, 11165 flow [2024-11-17 03:37:15,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9123, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11165, PETRI_PLACES=289, PETRI_TRANSITIONS=688} [2024-11-17 03:37:15,155 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 249 predicate places. [2024-11-17 03:37:15,155 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 688 transitions, 11165 flow [2024-11-17 03:37:15,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.451612903225806) internal successors, (355), 31 states have internal predecessors, (355), 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) [2024-11-17 03:37:15,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:15,156 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:15,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:15,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-17 03:37:15,356 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:15,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash 876832027, now seen corresponding path program 12 times [2024-11-17 03:37:15,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:15,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436762314] [2024-11-17 03:37:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:15,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:16,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:16,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436762314] [2024-11-17 03:37:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436762314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:16,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404835689] [2024-11-17 03:37:16,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-17 03:37:16,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:16,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:16,224 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:16,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-17 03:37:16,315 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-17 03:37:16,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:16,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-17 03:37:16,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:16,367 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 [2024-11-17 03:37:16,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:16,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2024-11-17 03:37:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:16,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:17,429 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 [2024-11-17 03:37:17,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:17,440 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 68 treesize of output 56 [2024-11-17 03:37:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404835689] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:17,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2024-11-17 03:37:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534195130] [2024-11-17 03:37:17,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:17,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-17 03:37:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-17 03:37:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2024-11-17 03:37:17,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:17,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 688 transitions, 11165 flow. Second operand has 38 states, 38 states have (on average 10.973684210526315) internal successors, (417), 38 states have internal predecessors, (417), 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) [2024-11-17 03:37:17,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:17,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:17,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:20,989 INFO L124 PetriNetUnfolderBase]: 3738/7039 cut-off events. [2024-11-17 03:37:20,989 INFO L125 PetriNetUnfolderBase]: For 89520/89520 co-relation queries the response was YES. [2024-11-17 03:37:21,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 7039 events. 3738/7039 cut-off events. For 89520/89520 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 49317 event pairs, 291 based on Foata normal form. 4/7043 useless extension candidates. Maximal degree in co-relation 46042. Up to 3649 conditions per place. [2024-11-17 03:37:21,049 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 528 selfloop transitions, 390 changer transitions 72/994 dead transitions. [2024-11-17 03:37:21,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 994 transitions, 16886 flow [2024-11-17 03:37:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-17 03:37:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-11-17 03:37:21,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 637 transitions. [2024-11-17 03:37:21,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-11-17 03:37:21,051 INFO L175 Difference]: Start difference. First operand has 289 places, 688 transitions, 11165 flow. Second operand 43 states and 637 transitions. [2024-11-17 03:37:21,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 994 transitions, 16886 flow [2024-11-17 03:37:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 994 transitions, 16579 flow, removed 103 selfloop flow, removed 13 redundant places. [2024-11-17 03:37:21,526 INFO L231 Difference]: Finished difference. Result has 331 places, 757 transitions, 13356 flow [2024-11-17 03:37:21,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10950, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=13356, PETRI_PLACES=331, PETRI_TRANSITIONS=757} [2024-11-17 03:37:21,527 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 291 predicate places. [2024-11-17 03:37:21,527 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 757 transitions, 13356 flow [2024-11-17 03:37:21,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 10.973684210526315) internal successors, (417), 38 states have internal predecessors, (417), 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) [2024-11-17 03:37:21,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:21,528 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:21,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:21,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:21,728 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:21,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1511159219, now seen corresponding path program 13 times [2024-11-17 03:37:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763271142] [2024-11-17 03:37:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:22,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763271142] [2024-11-17 03:37:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763271142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604295869] [2024-11-17 03:37:22,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-17 03:37:22,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:22,456 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-17 03:37:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:22,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:37:22,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:22,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:22,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:22,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-11-17 03:37:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:22,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604295869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:22,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:22,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 29 [2024-11-17 03:37:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210078681] [2024-11-17 03:37:22,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:22,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-17 03:37:22,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-17 03:37:22,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-11-17 03:37:23,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 757 transitions, 13356 flow. Second operand has 30 states, 30 states have (on average 11.2) internal successors, (336), 30 states have internal predecessors, (336), 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) [2024-11-17 03:37:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:26,257 INFO L124 PetriNetUnfolderBase]: 4068/7603 cut-off events. [2024-11-17 03:37:26,257 INFO L125 PetriNetUnfolderBase]: For 110604/110604 co-relation queries the response was YES. [2024-11-17 03:37:26,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54266 conditions, 7603 events. 4068/7603 cut-off events. For 110604/110604 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 53404 event pairs, 402 based on Foata normal form. 2/7605 useless extension candidates. Maximal degree in co-relation 53778. Up to 4122 conditions per place. [2024-11-17 03:37:26,335 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 574 selfloop transitions, 460 changer transitions 36/1074 dead transitions. [2024-11-17 03:37:26,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1074 transitions, 20041 flow [2024-11-17 03:37:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-17 03:37:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-17 03:37:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 597 transitions. [2024-11-17 03:37:26,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35535714285714287 [2024-11-17 03:37:26,337 INFO L175 Difference]: Start difference. First operand has 331 places, 757 transitions, 13356 flow. Second operand 40 states and 597 transitions. [2024-11-17 03:37:26,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1074 transitions, 20041 flow [2024-11-17 03:37:26,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1074 transitions, 19510 flow, removed 183 selfloop flow, removed 23 redundant places. [2024-11-17 03:37:26,926 INFO L231 Difference]: Finished difference. Result has 358 places, 869 transitions, 16815 flow [2024-11-17 03:37:26,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=16815, PETRI_PLACES=358, PETRI_TRANSITIONS=869} [2024-11-17 03:37:26,927 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 318 predicate places. [2024-11-17 03:37:26,927 INFO L471 AbstractCegarLoop]: Abstraction has has 358 places, 869 transitions, 16815 flow [2024-11-17 03:37:26,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.2) internal successors, (336), 30 states have internal predecessors, (336), 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) [2024-11-17 03:37:26,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:26,927 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:26,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-17 03:37:27,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:27,128 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:27,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash -285954267, now seen corresponding path program 14 times [2024-11-17 03:37:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:27,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290944729] [2024-11-17 03:37:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:27,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290944729] [2024-11-17 03:37:27,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290944729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:27,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835143018] [2024-11-17 03:37:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:37:27,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:27,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:27,951 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:27,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-17 03:37:28,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:37:28,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:28,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:37:28,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:28,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:28,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:28,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-11-17 03:37:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:28,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835143018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:28,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:28,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 27 [2024-11-17 03:37:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587709374] [2024-11-17 03:37:28,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:28,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-17 03:37:28,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-17 03:37:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2024-11-17 03:37:28,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-11-17 03:37:28,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 869 transitions, 16815 flow. Second operand has 28 states, 28 states have (on average 12.321428571428571) internal successors, (345), 28 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:28,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:28,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-11-17 03:37:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:31,558 INFO L124 PetriNetUnfolderBase]: 3850/7439 cut-off events. [2024-11-17 03:37:31,559 INFO L125 PetriNetUnfolderBase]: For 137929/138620 co-relation queries the response was YES. [2024-11-17 03:37:31,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57224 conditions, 7439 events. 3850/7439 cut-off events. For 137929/138620 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 54240 event pairs, 432 based on Foata normal form. 145/7547 useless extension candidates. Maximal degree in co-relation 57030. Up to 5336 conditions per place. [2024-11-17 03:37:31,684 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 775 selfloop transitions, 177 changer transitions 11/1013 dead transitions. [2024-11-17 03:37:31,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1013 transitions, 20950 flow [2024-11-17 03:37:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:37:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:37:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 379 transitions. [2024-11-17 03:37:31,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3759920634920635 [2024-11-17 03:37:31,686 INFO L175 Difference]: Start difference. First operand has 358 places, 869 transitions, 16815 flow. Second operand 24 states and 379 transitions. [2024-11-17 03:37:31,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1013 transitions, 20950 flow [2024-11-17 03:37:32,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1013 transitions, 20592 flow, removed 97 selfloop flow, removed 19 redundant places. [2024-11-17 03:37:32,624 INFO L231 Difference]: Finished difference. Result has 372 places, 926 transitions, 18324 flow [2024-11-17 03:37:32,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16511, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=18324, PETRI_PLACES=372, PETRI_TRANSITIONS=926} [2024-11-17 03:37:32,625 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 332 predicate places. [2024-11-17 03:37:32,626 INFO L471 AbstractCegarLoop]: Abstraction has has 372 places, 926 transitions, 18324 flow [2024-11-17 03:37:32,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.321428571428571) internal successors, (345), 28 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:37:32,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:32,626 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:32,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-17 03:37:32,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-17 03:37:32,827 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:32,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash -781332467, now seen corresponding path program 15 times [2024-11-17 03:37:32,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:32,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103420495] [2024-11-17 03:37:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:32,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:33,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:33,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103420495] [2024-11-17 03:37:33,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103420495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:33,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912997873] [2024-11-17 03:37:33,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:37:33,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:33,664 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:33,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-17 03:37:33,749 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-17 03:37:33,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:33,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-17 03:37:33,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:33,817 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 19 treesize of output 1 [2024-11-17 03:37:34,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:34,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2024-11-17 03:37:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:37:34,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:37:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912997873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:34,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:34,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15] total 45 [2024-11-17 03:37:34,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950220912] [2024-11-17 03:37:34,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:34,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-17 03:37:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-17 03:37:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2024-11-17 03:37:34,678 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:34,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 926 transitions, 18324 flow. Second operand has 46 states, 46 states have (on average 10.91304347826087) internal successors, (502), 46 states have internal predecessors, (502), 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) [2024-11-17 03:37:34,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:34,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:34,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:39,973 INFO L124 PetriNetUnfolderBase]: 4923/9208 cut-off events. [2024-11-17 03:37:39,973 INFO L125 PetriNetUnfolderBase]: For 165480/165480 co-relation queries the response was YES. [2024-11-17 03:37:40,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71145 conditions, 9208 events. 4923/9208 cut-off events. For 165480/165480 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 67267 event pairs, 395 based on Foata normal form. 4/9212 useless extension candidates. Maximal degree in co-relation 70943. Up to 4124 conditions per place. [2024-11-17 03:37:40,106 INFO L140 encePairwiseOnDemand]: 25/42 looper letters, 517 selfloop transitions, 804 changer transitions 51/1376 dead transitions. [2024-11-17 03:37:40,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1376 transitions, 27989 flow [2024-11-17 03:37:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-17 03:37:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2024-11-17 03:37:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 972 transitions. [2024-11-17 03:37:40,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32595573440643866 [2024-11-17 03:37:40,109 INFO L175 Difference]: Start difference. First operand has 372 places, 926 transitions, 18324 flow. Second operand 71 states and 972 transitions. [2024-11-17 03:37:40,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1376 transitions, 27989 flow [2024-11-17 03:37:41,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1376 transitions, 27449 flow, removed 248 selfloop flow, removed 9 redundant places. [2024-11-17 03:37:41,131 INFO L231 Difference]: Finished difference. Result has 462 places, 1145 transitions, 25482 flow [2024-11-17 03:37:41,132 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17956, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=25482, PETRI_PLACES=462, PETRI_TRANSITIONS=1145} [2024-11-17 03:37:41,132 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 422 predicate places. [2024-11-17 03:37:41,132 INFO L471 AbstractCegarLoop]: Abstraction has has 462 places, 1145 transitions, 25482 flow [2024-11-17 03:37:41,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 10.91304347826087) internal successors, (502), 46 states have internal predecessors, (502), 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) [2024-11-17 03:37:41,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:37:41,133 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:37:41,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-17 03:37:41,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-17 03:37:41,333 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-17 03:37:41,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:37:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1320871285, now seen corresponding path program 16 times [2024-11-17 03:37:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:37:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433277630] [2024-11-17 03:37:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:37:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:37:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:37:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:37:41,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:37:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433277630] [2024-11-17 03:37:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433277630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:37:41,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752501816] [2024-11-17 03:37:41,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:37:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:37:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:37:41,948 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:37:41,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-17 03:37:42,021 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:37:42,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:37:42,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 03:37:42,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:37:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:42,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:37:42,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:37:42,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 45 [2024-11-17 03:37:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:37:42,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752501816] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:37:42,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:37:42,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 32 [2024-11-17 03:37:42,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604592136] [2024-11-17 03:37:42,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:37:42,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-17 03:37:42,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:37:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-17 03:37:42,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2024-11-17 03:37:42,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-17 03:37:42,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1145 transitions, 25482 flow. Second operand has 33 states, 33 states have (on average 11.303030303030303) internal successors, (373), 33 states have internal predecessors, (373), 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) [2024-11-17 03:37:42,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:37:42,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-17 03:37:42,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:37:46,749 INFO L124 PetriNetUnfolderBase]: 5381/10027 cut-off events. [2024-11-17 03:37:46,750 INFO L125 PetriNetUnfolderBase]: For 248407/248407 co-relation queries the response was YES. [2024-11-17 03:37:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88164 conditions, 10027 events. 5381/10027 cut-off events. For 248407/248407 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 74011 event pairs, 631 based on Foata normal form. 3/10030 useless extension candidates. Maximal degree in co-relation 88005. Up to 5797 conditions per place. [2024-11-17 03:37:46,893 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 787 selfloop transitions, 592 changer transitions 14/1397 dead transitions. [2024-11-17 03:37:46,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1397 transitions, 32940 flow [2024-11-17 03:37:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-17 03:37:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-17 03:37:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 470 transitions. [2024-11-17 03:37:46,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-11-17 03:37:46,895 INFO L175 Difference]: Start difference. First operand has 462 places, 1145 transitions, 25482 flow. Second operand 30 states and 470 transitions. [2024-11-17 03:37:46,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1397 transitions, 32940 flow