./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-3.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/unroll-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:42:38,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:42:38,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:42:38,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:42:38,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:42:38,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:42:38,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:42:38,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:42:38,575 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:42:38,577 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:42:38,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:42:38,579 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:42:38,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:42:38,580 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:42:38,580 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:42:38,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:42:38,581 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:42:38,581 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:42:38,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:42:38,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:42:38,581 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:42:38,583 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:42:38,584 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:42:38,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:42:38,584 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:42:38,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:42:38,585 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:42:38,585 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:42:38,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:42:38,585 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:42:38,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:42:38,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:42:38,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:42:38,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:38,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:42:38,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:42:38,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:42:38,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:42:38,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:42:38,589 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:42:38,589 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:42:38,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:42:38,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-17 03:42:38,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:42:38,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:42:38,834 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:42:38,835 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:42:38,835 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:42:38,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-17 03:42:40,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:42:40,412 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:42:40,413 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-17 03:42:40,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cb30485/ae286b4b4555406e8ac6c45680820e54/FLAG3d93ec575 [2024-11-17 03:42:40,435 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6cb30485/ae286b4b4555406e8ac6c45680820e54 [2024-11-17 03:42:40,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:42:40,439 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:42:40,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:40,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:42:40,448 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:42:40,449 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1175536b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40, skipping insertion in model container [2024-11-17 03:42:40,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,469 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:42:40,734 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 03:42:40,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:40,749 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:42:40,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:42:40,805 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:42:40,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40 WrapperNode [2024-11-17 03:42:40,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:42:40,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:40,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:42:40,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:42:40,813 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,820 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,842 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 136 [2024-11-17 03:42:40,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:42:40,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:42:40,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:42:40,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:42:40,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,865 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,879 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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 03:42:40,880 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,880 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,886 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,888 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,889 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,895 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:42:40,896 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:42:40,896 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:42:40,896 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:42:40,897 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (1/1) ... [2024-11-17 03:42:40,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:42:40,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:40,928 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 03:42:40,930 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 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:42:40,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:42:40,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:42:40,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:42:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:42:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:42:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:42:40,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:42:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:42:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:42:40,973 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 03:42:41,068 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:42:41,070 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:42:41,356 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:42:41,357 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:42:41,577 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:42:41,578 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:42:41,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:41 BoogieIcfgContainer [2024-11-17 03:42:41,579 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:42:41,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:42:41,584 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:42:41,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:42:41,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:42:40" (1/3) ... [2024-11-17 03:42:41,589 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fcfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:41, skipping insertion in model container [2024-11-17 03:42:41,589 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:42:40" (2/3) ... [2024-11-17 03:42:41,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721fcfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:42:41, skipping insertion in model container [2024-11-17 03:42:41,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:42:41" (3/3) ... [2024-11-17 03:42:41,591 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-17 03:42:41,609 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:42:41,609 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-17 03:42:41,609 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:42:41,669 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:42:41,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 106 flow [2024-11-17 03:42:41,740 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2024-11-17 03:42:41,741 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:42:41,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 6/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-17 03:42:41,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 46 transitions, 106 flow [2024-11-17 03:42:41,750 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 43 transitions, 98 flow [2024-11-17 03:42:41,764 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:42:41,771 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;@b5a24a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:42:41,772 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-17 03:42:41,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:42:41,781 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:42:41,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:42:41,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:41,782 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:41,784 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:41,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:41,789 INFO L85 PathProgramCache]: Analyzing trace with hash 12347614, now seen corresponding path program 1 times [2024-11-17 03:42:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:41,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897454927] [2024-11-17 03:42:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:41,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:42,147 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 03:42:42,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:42,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897454927] [2024-11-17 03:42:42,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897454927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:42,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:42,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:42:42,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155041240] [2024-11-17 03:42:42,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:42,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:42,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:42:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:42:42,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:42,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:42:42,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:42,303 INFO L124 PetriNetUnfolderBase]: 88/231 cut-off events. [2024-11-17 03:42:42,304 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-17 03:42:42,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 231 events. 88/231 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1080 event pairs, 64 based on Foata normal form. 25/225 useless extension candidates. Maximal degree in co-relation 352. Up to 153 conditions per place. [2024-11-17 03:42:42,312 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 19 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-17 03:42:42,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 128 flow [2024-11-17 03:42:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-17 03:42:42,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6014492753623188 [2024-11-17 03:42:42,326 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 98 flow. Second operand 3 states and 83 transitions. [2024-11-17 03:42:42,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 128 flow [2024-11-17 03:42:42,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 120 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:42:42,331 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 82 flow [2024-11-17 03:42:42,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-17 03:42:42,338 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-17 03:42:42,338 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 82 flow [2024-11-17 03:42:42,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 03:42:42,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:42,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:42:42,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:42:42,339 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:42,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash 12347615, now seen corresponding path program 1 times [2024-11-17 03:42:42,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:42,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797682664] [2024-11-17 03:42:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:42,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:42,658 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 03:42:42,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:42,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797682664] [2024-11-17 03:42:42,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797682664] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:42,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:42,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:42,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710087981] [2024-11-17 03:42:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:42,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:42,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:42,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:42,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:42,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:42,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:42,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:42,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:42,808 INFO L124 PetriNetUnfolderBase]: 88/234 cut-off events. [2024-11-17 03:42:42,812 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-17 03:42:42,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 234 events. 88/234 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1088 event pairs, 64 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 380. Up to 158 conditions per place. [2024-11-17 03:42:42,814 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 23 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-17 03:42:42,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 136 flow [2024-11-17 03:42:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-17 03:42:42,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-11-17 03:42:42,818 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 82 flow. Second operand 3 states and 81 transitions. [2024-11-17 03:42:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 136 flow [2024-11-17 03:42:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:42,820 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 92 flow [2024-11-17 03:42:42,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-17 03:42:42,821 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-11-17 03:42:42,821 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 92 flow [2024-11-17 03:42:42,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:42,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:42,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:42:42,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:42:42,824 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:42,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1518987567, now seen corresponding path program 1 times [2024-11-17 03:42:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:42,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625644941] [2024-11-17 03:42:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:42,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:43,152 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 03:42:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625644941] [2024-11-17 03:42:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625644941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349573610] [2024-11-17 03:42:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:43,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:43,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:43,158 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 03:42:43,160 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 03:42:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:43,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:43,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:43,330 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 03:42:43,579 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 03:42:43,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:43,740 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 03:42:43,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349573610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:43,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:43,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:42:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302165389] [2024-11-17 03:42:43,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:43,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:42:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:42:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:43,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:43,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 92 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 03:42:43,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:43,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:44,223 INFO L124 PetriNetUnfolderBase]: 88/233 cut-off events. [2024-11-17 03:42:44,223 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-17 03:42:44,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 233 events. 88/233 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1087 event pairs, 64 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 391. Up to 153 conditions per place. [2024-11-17 03:42:44,227 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 19 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-11-17 03:42:44,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 138 flow [2024-11-17 03:42:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-17 03:42:44,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-17 03:42:44,230 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 92 flow. Second operand 5 states and 115 transitions. [2024-11-17 03:42:44,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 138 flow [2024-11-17 03:42:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:44,233 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 104 flow [2024-11-17 03:42:44,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-17 03:42:44,235 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2024-11-17 03:42:44,235 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 104 flow [2024-11-17 03:42:44,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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 03:42:44,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:44,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:44,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:42:44,440 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 03:42:44,441 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:44,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash 507382367, now seen corresponding path program 1 times [2024-11-17 03:42:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094709940] [2024-11-17 03:42:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:44,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:44,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:44,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094709940] [2024-11-17 03:42:44,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094709940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:44,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:44,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:42:44,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466625518] [2024-11-17 03:42:44,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:44,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:44,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-11-17 03:42:44,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:42:44,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:44,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-11-17 03:42:44,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:44,596 INFO L124 PetriNetUnfolderBase]: 88/207 cut-off events. [2024-11-17 03:42:44,596 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-17 03:42:44,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 207 events. 88/207 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 834 event pairs, 64 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 358. Up to 152 conditions per place. [2024-11-17 03:42:44,600 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-17 03:42:44,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 142 flow [2024-11-17 03:42:44,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-17 03:42:44,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46195652173913043 [2024-11-17 03:42:44,601 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 104 flow. Second operand 4 states and 85 transitions. [2024-11-17 03:42:44,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 142 flow [2024-11-17 03:42:44,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 136 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:44,603 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 94 flow [2024-11-17 03:42:44,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-11-17 03:42:44,603 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-11-17 03:42:44,604 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 94 flow [2024-11-17 03:42:44,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 03:42:44,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:44,604 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:44,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:42:44,607 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:44,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash 507382368, now seen corresponding path program 1 times [2024-11-17 03:42:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:44,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520759611] [2024-11-17 03:42:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:44,812 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 03:42:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520759611] [2024-11-17 03:42:44,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520759611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699836073] [2024-11-17 03:42:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:44,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:44,816 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 03:42:44,818 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 03:42:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:44,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:42:44,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:44,899 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 03:42:45,008 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 03:42:45,008 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699836073] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:45,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:45,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 9 [2024-11-17 03:42:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644798731] [2024-11-17 03:42:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:45,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:45,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:45,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:45,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:42:45,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:42:45,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:45,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:45,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:42:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:45,305 INFO L124 PetriNetUnfolderBase]: 174/384 cut-off events. [2024-11-17 03:42:45,306 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-17 03:42:45,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 384 events. 174/384 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1844 event pairs, 64 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 689. Up to 165 conditions per place. [2024-11-17 03:42:45,308 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 36 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-11-17 03:42:45,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 205 flow [2024-11-17 03:42:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-17 03:42:45,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-11-17 03:42:45,317 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 94 flow. Second operand 4 states and 114 transitions. [2024-11-17 03:42:45,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 205 flow [2024-11-17 03:42:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:45,319 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 105 flow [2024-11-17 03:42:45,319 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-11-17 03:42:45,320 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-11-17 03:42:45,320 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 105 flow [2024-11-17 03:42:45,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:45,320 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:45,321 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:45,341 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 03:42:45,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:45,522 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:45,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1569751922, now seen corresponding path program 1 times [2024-11-17 03:42:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:45,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953716784] [2024-11-17 03:42:45,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:45,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:45,703 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 03:42:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953716784] [2024-11-17 03:42:45,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953716784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:45,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522891221] [2024-11-17 03:42:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:45,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:45,707 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 03:42:45,708 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 03:42:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:45,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:42:45,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:45,886 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 03:42:45,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:45,972 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 29 treesize of output 25 [2024-11-17 03:42:46,000 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 03:42:46,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522891221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:46,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:46,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-17 03:42:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977818547] [2024-11-17 03:42:46,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:46,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:42:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:42:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:42:46,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-17 03:42:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 105 flow. Second operand has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 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 03:42:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-17 03:42:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:46,349 INFO L124 PetriNetUnfolderBase]: 292/600 cut-off events. [2024-11-17 03:42:46,349 INFO L125 PetriNetUnfolderBase]: For 67/81 co-relation queries the response was YES. [2024-11-17 03:42:46,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 600 events. 292/600 cut-off events. For 67/81 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3048 event pairs, 81 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 1197. Up to 333 conditions per place. [2024-11-17 03:42:46,355 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 35 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-17 03:42:46,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 214 flow [2024-11-17 03:42:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-11-17 03:42:46,358 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-11-17 03:42:46,358 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 105 flow. Second operand 5 states and 123 transitions. [2024-11-17 03:42:46,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 214 flow [2024-11-17 03:42:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:46,360 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 117 flow [2024-11-17 03:42:46,361 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-11-17 03:42:46,362 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-17 03:42:46,362 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 117 flow [2024-11-17 03:42:46,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 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 03:42:46,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:46,364 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:46,382 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 03:42:46,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:46,569 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:46,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1417669774, now seen corresponding path program 1 times [2024-11-17 03:42:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:46,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283468665] [2024-11-17 03:42:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,783 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 03:42:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283468665] [2024-11-17 03:42:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283468665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206252662] [2024-11-17 03:42:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:46,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:46,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:46,787 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 03:42:46,788 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 03:42:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:46,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:46,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:47,014 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 03:42:47,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:47,056 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 29 treesize of output 25 [2024-11-17 03:42:47,322 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 03:42:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206252662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:47,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:47,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-17 03:42:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45239675] [2024-11-17 03:42:47,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:47,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:42:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:42:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:42:47,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-17 03:42:47,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 117 flow. Second operand has 17 states, 17 states have (on average 18.11764705882353) internal successors, (308), 17 states have internal predecessors, (308), 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 03:42:47,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:47,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-17 03:42:47,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:48,209 INFO L124 PetriNetUnfolderBase]: 376/795 cut-off events. [2024-11-17 03:42:48,210 INFO L125 PetriNetUnfolderBase]: For 88/106 co-relation queries the response was YES. [2024-11-17 03:42:48,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 795 events. 376/795 cut-off events. For 88/106 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4466 event pairs, 120 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 966. Up to 233 conditions per place. [2024-11-17 03:42:48,217 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-11-17 03:42:48,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 342 flow [2024-11-17 03:42:48,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:42:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:42:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-11-17 03:42:48,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47035573122529645 [2024-11-17 03:42:48,220 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 117 flow. Second operand 11 states and 238 transitions. [2024-11-17 03:42:48,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 342 flow [2024-11-17 03:42:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:42:48,224 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 165 flow [2024-11-17 03:42:48,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=165, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-11-17 03:42:48,226 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-11-17 03:42:48,226 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 165 flow [2024-11-17 03:42:48,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.11764705882353) internal successors, (308), 17 states have internal predecessors, (308), 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 03:42:48,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:48,229 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:48,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:42:48,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:48,430 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:48,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:48,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1438636561, now seen corresponding path program 1 times [2024-11-17 03:42:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:48,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256986496] [2024-11-17 03:42:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:48,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:48,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256986496] [2024-11-17 03:42:48,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256986496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:48,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368685203] [2024-11-17 03:42:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:48,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:48,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:48,660 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 03:42:48,661 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 03:42:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:48,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:42:48,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:48,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:48,980 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 36 treesize of output 32 [2024-11-17 03:42:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:42:49,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368685203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:49,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:49,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-17 03:42:49,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029947708] [2024-11-17 03:42:49,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:49,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:42:49,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:49,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:42:49,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:42:49,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:49,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 165 flow. Second operand has 19 states, 19 states have (on average 19.736842105263158) internal successors, (375), 19 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 03:42:49,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:49,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:49,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:50,480 INFO L124 PetriNetUnfolderBase]: 491/1014 cut-off events. [2024-11-17 03:42:50,481 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-11-17 03:42:50,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 1014 events. 491/1014 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5765 event pairs, 170 based on Foata normal form. 0/1005 useless extension candidates. Maximal degree in co-relation 1200. Up to 291 conditions per place. [2024-11-17 03:42:50,487 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-11-17 03:42:50,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 104 transitions, 544 flow [2024-11-17 03:42:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:42:50,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:42:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 322 transitions. [2024-11-17 03:42:50,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-17 03:42:50,489 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 165 flow. Second operand 13 states and 322 transitions. [2024-11-17 03:42:50,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 104 transitions, 544 flow [2024-11-17 03:42:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 104 transitions, 539 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:50,492 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 213 flow [2024-11-17 03:42:50,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=213, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2024-11-17 03:42:50,493 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-11-17 03:42:50,493 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 213 flow [2024-11-17 03:42:50,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.736842105263158) internal successors, (375), 19 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 03:42:50,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:50,494 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:50,511 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 03:42:50,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:50,695 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:50,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:50,695 INFO L85 PathProgramCache]: Analyzing trace with hash -698297692, now seen corresponding path program 1 times [2024-11-17 03:42:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:50,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138736064] [2024-11-17 03:42:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:42:50,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138736064] [2024-11-17 03:42:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138736064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:50,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:50,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:42:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421310840] [2024-11-17 03:42:50,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:50,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:42:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:42:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:42:50,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-11-17 03:42:50,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:50,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:50,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-11-17 03:42:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:50,877 INFO L124 PetriNetUnfolderBase]: 491/1020 cut-off events. [2024-11-17 03:42:50,878 INFO L125 PetriNetUnfolderBase]: For 442/442 co-relation queries the response was YES. [2024-11-17 03:42:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2418 conditions, 1020 events. 491/1020 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5923 event pairs, 145 based on Foata normal form. 2/1007 useless extension candidates. Maximal degree in co-relation 1319. Up to 679 conditions per place. [2024-11-17 03:42:50,883 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 47 selfloop transitions, 4 changer transitions 1/60 dead transitions. [2024-11-17 03:42:50,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 372 flow [2024-11-17 03:42:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:42:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:42:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-17 03:42:50,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-11-17 03:42:50,885 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 213 flow. Second operand 3 states and 95 transitions. [2024-11-17 03:42:50,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 372 flow [2024-11-17 03:42:50,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 346 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-17 03:42:50,887 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 225 flow [2024-11-17 03:42:50,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2024-11-17 03:42:50,888 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-11-17 03:42:50,888 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 225 flow [2024-11-17 03:42:50,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:42:50,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:50,889 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] [2024-11-17 03:42:50,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:42:50,889 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:50,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:50,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1310123963, now seen corresponding path program 1 times [2024-11-17 03:42:50,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:50,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317404866] [2024-11-17 03:42:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:50,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:50,993 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 03:42:50,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:50,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317404866] [2024-11-17 03:42:50,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317404866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:50,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:50,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944874563] [2024-11-17 03:42:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:50,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:50,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:51,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:51,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:51,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:51,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:51,203 INFO L124 PetriNetUnfolderBase]: 875/1656 cut-off events. [2024-11-17 03:42:51,203 INFO L125 PetriNetUnfolderBase]: For 636/636 co-relation queries the response was YES. [2024-11-17 03:42:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 1656 events. 875/1656 cut-off events. For 636/636 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9631 event pairs, 305 based on Foata normal form. 36/1688 useless extension candidates. Maximal degree in co-relation 2179. Up to 716 conditions per place. [2024-11-17 03:42:51,214 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 71 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-11-17 03:42:51,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 91 transitions, 554 flow [2024-11-17 03:42:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-17 03:42:51,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-11-17 03:42:51,216 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 225 flow. Second operand 5 states and 151 transitions. [2024-11-17 03:42:51,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 91 transitions, 554 flow [2024-11-17 03:42:51,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 91 transitions, 545 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:42:51,219 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 325 flow [2024-11-17 03:42:51,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-11-17 03:42:51,220 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-11-17 03:42:51,221 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 325 flow [2024-11-17 03:42:51,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:51,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:51,222 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] [2024-11-17 03:42:51,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:42:51,222 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:51,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:51,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2011663425, now seen corresponding path program 2 times [2024-11-17 03:42:51,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:51,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25881602] [2024-11-17 03:42:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:51,308 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 03:42:51,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25881602] [2024-11-17 03:42:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25881602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:51,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:51,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:51,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130990562] [2024-11-17 03:42:51,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:51,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:51,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:51,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:51,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:51,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:51,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:51,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:51,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:51,613 INFO L124 PetriNetUnfolderBase]: 1011/1963 cut-off events. [2024-11-17 03:42:51,613 INFO L125 PetriNetUnfolderBase]: For 2263/2263 co-relation queries the response was YES. [2024-11-17 03:42:51,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5514 conditions, 1963 events. 1011/1963 cut-off events. For 2263/2263 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12162 event pairs, 447 based on Foata normal form. 28/1987 useless extension candidates. Maximal degree in co-relation 2927. Up to 1106 conditions per place. [2024-11-17 03:42:51,626 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 88 selfloop transitions, 14 changer transitions 3/111 dead transitions. [2024-11-17 03:42:51,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 111 transitions, 817 flow [2024-11-17 03:42:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-11-17 03:42:51,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-11-17 03:42:51,627 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 325 flow. Second operand 6 states and 173 transitions. [2024-11-17 03:42:51,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 111 transitions, 817 flow [2024-11-17 03:42:51,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 789 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:51,633 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 444 flow [2024-11-17 03:42:51,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-11-17 03:42:51,633 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-11-17 03:42:51,634 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 444 flow [2024-11-17 03:42:51,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:51,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:51,634 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] [2024-11-17 03:42:51,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:42:51,634 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:51,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1985372181, now seen corresponding path program 3 times [2024-11-17 03:42:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425562779] [2024-11-17 03:42:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:51,732 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 03:42:51,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:51,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425562779] [2024-11-17 03:42:51,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425562779] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:51,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025846730] [2024-11-17 03:42:51,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:42:51,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:51,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:51,736 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 03:42:51,739 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 03:42:51,809 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:42:51,809 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:51,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:51,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:51,839 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 03:42:51,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:51,876 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 03:42:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025846730] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:51,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:42:51,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-17 03:42:51,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355596535] [2024-11-17 03:42:51,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:51,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:51,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:51,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:51,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-17 03:42:51,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:42:51,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 444 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 03:42:51,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:42:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:52,120 INFO L124 PetriNetUnfolderBase]: 927/1865 cut-off events. [2024-11-17 03:42:52,120 INFO L125 PetriNetUnfolderBase]: For 3173/3175 co-relation queries the response was YES. [2024-11-17 03:42:52,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5789 conditions, 1865 events. 927/1865 cut-off events. For 3173/3175 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11869 event pairs, 224 based on Foata normal form. 18/1847 useless extension candidates. Maximal degree in co-relation 4974. Up to 1107 conditions per place. [2024-11-17 03:42:52,132 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 71 selfloop transitions, 17 changer transitions 2/98 dead transitions. [2024-11-17 03:42:52,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 98 transitions, 831 flow [2024-11-17 03:42:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-17 03:42:52,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-11-17 03:42:52,134 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 444 flow. Second operand 4 states and 118 transitions. [2024-11-17 03:42:52,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 98 transitions, 831 flow [2024-11-17 03:42:52,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 811 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:52,142 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 550 flow [2024-11-17 03:42:52,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=550, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-11-17 03:42:52,143 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-11-17 03:42:52,143 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 550 flow [2024-11-17 03:42:52,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 03:42:52,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:52,143 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] [2024-11-17 03:42:52,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:42:52,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:52,345 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:52,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:52,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1466456955, now seen corresponding path program 4 times [2024-11-17 03:42:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154483928] [2024-11-17 03:42:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:52,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:52,427 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 03:42:52,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:52,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154483928] [2024-11-17 03:42:52,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154483928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:52,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:52,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613757162] [2024-11-17 03:42:52,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:52,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:52,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:52,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:52,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:52,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:52,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:52,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:52,736 INFO L124 PetriNetUnfolderBase]: 929/1802 cut-off events. [2024-11-17 03:42:52,736 INFO L125 PetriNetUnfolderBase]: For 5191/5199 co-relation queries the response was YES. [2024-11-17 03:42:52,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1802 events. 929/1802 cut-off events. For 5191/5199 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11052 event pairs, 304 based on Foata normal form. 36/1834 useless extension candidates. Maximal degree in co-relation 5296. Up to 784 conditions per place. [2024-11-17 03:42:52,749 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 85 selfloop transitions, 23 changer transitions 9/123 dead transitions. [2024-11-17 03:42:52,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 1122 flow [2024-11-17 03:42:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:42:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:42:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-11-17 03:42:52,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-11-17 03:42:52,750 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 550 flow. Second operand 6 states and 175 transitions. [2024-11-17 03:42:52,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 1122 flow [2024-11-17 03:42:52,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 1102 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-11-17 03:42:52,761 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 723 flow [2024-11-17 03:42:52,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-11-17 03:42:52,762 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-11-17 03:42:52,762 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 723 flow [2024-11-17 03:42:52,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 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 03:42:52,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:52,762 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] [2024-11-17 03:42:52,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-17 03:42:52,763 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:52,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:52,763 INFO L85 PathProgramCache]: Analyzing trace with hash 563324863, now seen corresponding path program 5 times [2024-11-17 03:42:52,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:52,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10529925] [2024-11-17 03:42:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:52,856 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 03:42:52,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:52,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10529925] [2024-11-17 03:42:52,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10529925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:52,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909798864] [2024-11-17 03:42:52,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:42:52,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:52,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:52,859 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 03:42:52,860 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 03:42:52,927 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:42:52,927 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:42:52,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:52,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:52,965 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 03:42:52,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:53,018 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 03:42:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909798864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:53,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:53,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-17 03:42:53,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987679703] [2024-11-17 03:42:53,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:53,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-17 03:42:53,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-17 03:42:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:42:53,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:53,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 723 flow. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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 03:42:53,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:53,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:53,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:53,440 INFO L124 PetriNetUnfolderBase]: 971/1871 cut-off events. [2024-11-17 03:42:53,440 INFO L125 PetriNetUnfolderBase]: For 6600/6608 co-relation queries the response was YES. [2024-11-17 03:42:53,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7042 conditions, 1871 events. 971/1871 cut-off events. For 6600/6608 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11307 event pairs, 207 based on Foata normal form. 38/1905 useless extension candidates. Maximal degree in co-relation 6653. Up to 648 conditions per place. [2024-11-17 03:42:53,457 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 91 selfloop transitions, 62 changer transitions 7/166 dead transitions. [2024-11-17 03:42:53,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 166 transitions, 1572 flow [2024-11-17 03:42:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:42:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:42:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-11-17 03:42:53,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:42:53,459 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 723 flow. Second operand 10 states and 276 transitions. [2024-11-17 03:42:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 166 transitions, 1572 flow [2024-11-17 03:42:53,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 166 transitions, 1540 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:53,473 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 1236 flow [2024-11-17 03:42:53,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1236, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-11-17 03:42:53,474 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-11-17 03:42:53,474 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 1236 flow [2024-11-17 03:42:53,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 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 03:42:53,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:53,474 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] [2024-11-17 03:42:53,492 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 03:42:53,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:53,676 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:53,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash -350603951, now seen corresponding path program 6 times [2024-11-17 03:42:53,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:53,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528581355] [2024-11-17 03:42:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:53,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:53,760 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 03:42:53,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:53,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528581355] [2024-11-17 03:42:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528581355] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:53,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:53,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:42:53,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777805209] [2024-11-17 03:42:53,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:53,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:42:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:42:53,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:42:53,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:42:53,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 1236 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 03:42:53,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:53,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:42:53,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:54,024 INFO L124 PetriNetUnfolderBase]: 797/1616 cut-off events. [2024-11-17 03:42:54,025 INFO L125 PetriNetUnfolderBase]: For 9560/9576 co-relation queries the response was YES. [2024-11-17 03:42:54,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 1616 events. 797/1616 cut-off events. For 9560/9576 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9996 event pairs, 323 based on Foata normal form. 16/1606 useless extension candidates. Maximal degree in co-relation 6317. Up to 832 conditions per place. [2024-11-17 03:42:54,046 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 109 selfloop transitions, 13 changer transitions 3/134 dead transitions. [2024-11-17 03:42:54,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1671 flow [2024-11-17 03:42:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:42:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:42:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-17 03:42:54,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-17 03:42:54,048 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 1236 flow. Second operand 5 states and 138 transitions. [2024-11-17 03:42:54,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1671 flow [2024-11-17 03:42:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 134 transitions, 1591 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:54,073 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1223 flow [2024-11-17 03:42:54,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1223, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-11-17 03:42:54,075 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-11-17 03:42:54,075 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1223 flow [2024-11-17 03:42:54,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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 03:42:54,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:54,076 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] [2024-11-17 03:42:54,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-17 03:42:54,076 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:54,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -953420993, now seen corresponding path program 7 times [2024-11-17 03:42:54,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:54,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392706484] [2024-11-17 03:42:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:54,192 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 03:42:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392706484] [2024-11-17 03:42:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392706484] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579423421] [2024-11-17 03:42:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-17 03:42:54,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:54,195 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 03:42:54,197 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 03:42:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:54,264 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-17 03:42:54,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:54,294 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 03:42:54,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:54,341 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 03:42:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579423421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:54,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:54,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-17 03:42:54,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803799686] [2024-11-17 03:42:54,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:54,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-17 03:42:54,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-17 03:42:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-17 03:42:54,355 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:42:54,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1223 flow. Second operand has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 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 03:42:54,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:54,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:42:54,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:54,666 INFO L124 PetriNetUnfolderBase]: 859/1652 cut-off events. [2024-11-17 03:42:54,667 INFO L125 PetriNetUnfolderBase]: For 10454/10454 co-relation queries the response was YES. [2024-11-17 03:42:54,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7541 conditions, 1652 events. 859/1652 cut-off events. For 10454/10454 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9596 event pairs, 355 based on Foata normal form. 22/1670 useless extension candidates. Maximal degree in co-relation 6582. Up to 880 conditions per place. [2024-11-17 03:42:54,682 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 96 selfloop transitions, 44 changer transitions 8/154 dead transitions. [2024-11-17 03:42:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1800 flow [2024-11-17 03:42:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:42:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:42:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-11-17 03:42:54,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-11-17 03:42:54,684 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1223 flow. Second operand 8 states and 213 transitions. [2024-11-17 03:42:54,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1800 flow [2024-11-17 03:42:54,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1767 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-17 03:42:54,711 INFO L231 Difference]: Finished difference. Result has 109 places, 114 transitions, 1398 flow [2024-11-17 03:42:54,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1398, PETRI_PLACES=109, PETRI_TRANSITIONS=114} [2024-11-17 03:42:54,711 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-11-17 03:42:54,712 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 114 transitions, 1398 flow [2024-11-17 03:42:54,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.0) internal successors, (189), 9 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 03:42:54,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:54,712 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:42:54,730 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 03:42:54,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 03:42:54,913 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:54,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1452872887, now seen corresponding path program 1 times [2024-11-17 03:42:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:54,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275474341] [2024-11-17 03:42:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:54,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:54,986 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 03:42:54,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:54,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275474341] [2024-11-17 03:42:54,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275474341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:42:54,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:42:54,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:42:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771284595] [2024-11-17 03:42:54,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:42:54,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:42:54,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:54,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:42:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:42:54,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:42:54,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 114 transitions, 1398 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 03:42:54,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:54,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:42:54,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:42:55,240 INFO L124 PetriNetUnfolderBase]: 785/1504 cut-off events. [2024-11-17 03:42:55,240 INFO L125 PetriNetUnfolderBase]: For 12570/12603 co-relation queries the response was YES. [2024-11-17 03:42:55,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7657 conditions, 1504 events. 785/1504 cut-off events. For 12570/12603 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8566 event pairs, 143 based on Foata normal form. 38/1533 useless extension candidates. Maximal degree in co-relation 7189. Up to 1080 conditions per place. [2024-11-17 03:42:55,253 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 105 selfloop transitions, 21 changer transitions 3/136 dead transitions. [2024-11-17 03:42:55,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 136 transitions, 1860 flow [2024-11-17 03:42:55,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:42:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:42:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-17 03:42:55,255 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-11-17 03:42:55,255 INFO L175 Difference]: Start difference. First operand has 109 places, 114 transitions, 1398 flow. Second operand 4 states and 117 transitions. [2024-11-17 03:42:55,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 136 transitions, 1860 flow [2024-11-17 03:42:55,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1763 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-17 03:42:55,284 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1490 flow [2024-11-17 03:42:55,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1490, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-11-17 03:42:55,286 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-11-17 03:42:55,286 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1490 flow [2024-11-17 03:42:55,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 03:42:55,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:42:55,286 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 03:42:55,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:42:55,287 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:42:55,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:42:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash 843935410, now seen corresponding path program 1 times [2024-11-17 03:42:55,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:42:55,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968497613] [2024-11-17 03:42:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:55,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:42:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:55,687 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 03:42:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:42:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968497613] [2024-11-17 03:42:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968497613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:42:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610893051] [2024-11-17 03:42:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:42:55,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:42:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:42:55,691 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 03:42:55,693 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 03:42:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:42:55,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:42:55,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:42:56,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-17 03:42:56,048 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 03:42:56,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:42:56,210 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:42:56,211 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 7 [2024-11-17 03:42:56,421 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 03:42:56,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610893051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:42:56,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:42:56,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 23 [2024-11-17 03:42:56,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338546644] [2024-11-17 03:42:56,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:42:56,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:42:56,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:42:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:42:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:42:56,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-17 03:42:56,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1490 flow. Second operand has 23 states, 23 states have (on average 19.91304347826087) internal successors, (458), 23 states have internal predecessors, (458), 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 03:42:56,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:42:56,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-17 03:42:56,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:00,603 INFO L124 PetriNetUnfolderBase]: 1636/3083 cut-off events. [2024-11-17 03:43:00,604 INFO L125 PetriNetUnfolderBase]: For 21699/21699 co-relation queries the response was YES. [2024-11-17 03:43:00,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14631 conditions, 3083 events. 1636/3083 cut-off events. For 21699/21699 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19500 event pairs, 164 based on Foata normal form. 13/3096 useless extension candidates. Maximal degree in co-relation 14596. Up to 508 conditions per place. [2024-11-17 03:43:00,623 INFO L140 encePairwiseOnDemand]: 30/46 looper letters, 161 selfloop transitions, 78 changer transitions 208/451 dead transitions. [2024-11-17 03:43:00,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 451 transitions, 5045 flow [2024-11-17 03:43:00,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-17 03:43:00,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-17 03:43:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1125 transitions. [2024-11-17 03:43:00,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203515263644773 [2024-11-17 03:43:00,629 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1490 flow. Second operand 47 states and 1125 transitions. [2024-11-17 03:43:00,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 451 transitions, 5045 flow [2024-11-17 03:43:00,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 451 transitions, 4971 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:43:00,673 INFO L231 Difference]: Finished difference. Result has 164 places, 128 transitions, 1765 flow [2024-11-17 03:43:00,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1765, PETRI_PLACES=164, PETRI_TRANSITIONS=128} [2024-11-17 03:43:00,673 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-11-17 03:43:00,674 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 128 transitions, 1765 flow [2024-11-17 03:43:00,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.91304347826087) internal successors, (458), 23 states have internal predecessors, (458), 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 03:43:00,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:00,674 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:00,689 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 03:43:00,875 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,SelfDestructingSolverStorable17 [2024-11-17 03:43:00,875 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:43:00,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:00,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1586458832, now seen corresponding path program 2 times [2024-11-17 03:43:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:00,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382874456] [2024-11-17 03:43:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:00,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:01,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:01,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382874456] [2024-11-17 03:43:01,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382874456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:01,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557368854] [2024-11-17 03:43:01,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:43:01,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:01,278 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 03:43:01,279 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 03:43:01,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:43:01,354 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:01,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-17 03:43:01,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:01,494 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 03:43:01,828 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-17 03:43:01,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-17 03:43:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:01,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:02,329 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 170 treesize of output 150 [2024-11-17 03:43:02,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:43:02,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 488 [2024-11-17 03:43:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:41,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557368854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:41,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:41,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2024-11-17 03:43:41,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801467547] [2024-11-17 03:43:41,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:41,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-17 03:43:41,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-17 03:43:41,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2024-11-17 03:43:41,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-11-17 03:43:41,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 128 transitions, 1765 flow. Second operand has 29 states, 29 states have (on average 19.620689655172413) internal successors, (569), 29 states have internal predecessors, (569), 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 03:43:41,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:41,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-11-17 03:43:41,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:46,720 INFO L124 PetriNetUnfolderBase]: 2194/4131 cut-off events. [2024-11-17 03:43:46,720 INFO L125 PetriNetUnfolderBase]: For 47482/47486 co-relation queries the response was YES. [2024-11-17 03:43:46,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23403 conditions, 4131 events. 2194/4131 cut-off events. For 47482/47486 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 27549 event pairs, 91 based on Foata normal form. 16/4147 useless extension candidates. Maximal degree in co-relation 23352. Up to 680 conditions per place. [2024-11-17 03:43:46,757 INFO L140 encePairwiseOnDemand]: 30/46 looper letters, 353 selfloop transitions, 208 changer transitions 2/567 dead transitions. [2024-11-17 03:43:46,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 567 transitions, 7240 flow [2024-11-17 03:43:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-17 03:43:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-17 03:43:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1319 transitions. [2024-11-17 03:43:46,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5309983896940419 [2024-11-17 03:43:46,761 INFO L175 Difference]: Start difference. First operand has 164 places, 128 transitions, 1765 flow. Second operand 54 states and 1319 transitions. [2024-11-17 03:43:46,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 567 transitions, 7240 flow [2024-11-17 03:43:46,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 567 transitions, 6372 flow, removed 223 selfloop flow, removed 21 redundant places. [2024-11-17 03:43:46,893 INFO L231 Difference]: Finished difference. Result has 178 places, 276 transitions, 3905 flow [2024-11-17 03:43:46,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3905, PETRI_PLACES=178, PETRI_TRANSITIONS=276} [2024-11-17 03:43:46,894 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-11-17 03:43:46,894 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 276 transitions, 3905 flow [2024-11-17 03:43:46,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 19.620689655172413) internal successors, (569), 29 states have internal predecessors, (569), 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 03:43:46,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:46,895 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:46,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-17 03:43:47,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:47,100 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:43:47,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash -275532472, now seen corresponding path program 3 times [2024-11-17 03:43:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:47,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577330530] [2024-11-17 03:43:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:47,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:43:47,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577330530] [2024-11-17 03:43:47,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577330530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:47,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47112643] [2024-11-17 03:43:47,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:43:47,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:47,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:47,532 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 03:43:47,533 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 03:43:47,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:43:47,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:47,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-17 03:43:47,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:47,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47112643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:47,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2024-11-17 03:43:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122404684] [2024-11-17 03:43:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:47,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:43:47,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:43:47,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:43:47,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-11-17 03:43:47,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 276 transitions, 3905 flow. Second operand has 15 states, 15 states have (on average 21.133333333333333) internal successors, (317), 15 states have internal predecessors, (317), 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 03:43:47,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:47,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-11-17 03:43:47,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:48,668 INFO L124 PetriNetUnfolderBase]: 1772/3273 cut-off events. [2024-11-17 03:43:48,669 INFO L125 PetriNetUnfolderBase]: For 34995/34995 co-relation queries the response was YES. [2024-11-17 03:43:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18427 conditions, 3273 events. 1772/3273 cut-off events. For 34995/34995 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 20000 event pairs, 207 based on Foata normal form. 156/3425 useless extension candidates. Maximal degree in co-relation 18376. Up to 1030 conditions per place. [2024-11-17 03:43:48,695 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 291 selfloop transitions, 117 changer transitions 0/414 dead transitions. [2024-11-17 03:43:48,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 414 transitions, 6267 flow [2024-11-17 03:43:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 03:43:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-17 03:43:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 384 transitions. [2024-11-17 03:43:48,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5565217391304348 [2024-11-17 03:43:48,697 INFO L175 Difference]: Start difference. First operand has 178 places, 276 transitions, 3905 flow. Second operand 15 states and 384 transitions. [2024-11-17 03:43:48,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 414 transitions, 6267 flow [2024-11-17 03:43:48,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 414 transitions, 5459 flow, removed 305 selfloop flow, removed 23 redundant places. [2024-11-17 03:43:48,794 INFO L231 Difference]: Finished difference. Result has 156 places, 255 transitions, 3326 flow [2024-11-17 03:43:48,794 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3326, PETRI_PLACES=156, PETRI_TRANSITIONS=255} [2024-11-17 03:43:48,794 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-11-17 03:43:48,795 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 255 transitions, 3326 flow [2024-11-17 03:43:48,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 21.133333333333333) internal successors, (317), 15 states have internal predecessors, (317), 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 03:43:48,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:48,795 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:48,812 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 03:43:48,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:48,996 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:43:48,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1597883032, now seen corresponding path program 4 times [2024-11-17 03:43:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:48,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488239102] [2024-11-17 03:43:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:50,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488239102] [2024-11-17 03:43:50,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488239102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:50,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605712539] [2024-11-17 03:43:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-17 03:43:50,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:50,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:50,199 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 03:43:50,199 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 03:43:50,273 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-17 03:43:50,273 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:50,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:43:50,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:50,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:43:50,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-17 03:43:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:43:50,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:50,760 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-17 03:43:50,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-17 03:43:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-17 03:43:50,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605712539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:43:50,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:43:50,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2024-11-17 03:43:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507590227] [2024-11-17 03:43:50,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:43:50,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-17 03:43:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:43:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-17 03:43:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2024-11-17 03:43:51,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-11-17 03:43:51,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 255 transitions, 3326 flow. Second operand has 26 states, 26 states have (on average 21.692307692307693) internal successors, (564), 26 states have internal predecessors, (564), 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 03:43:51,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:43:51,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-11-17 03:43:51,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:43:52,609 INFO L124 PetriNetUnfolderBase]: 2260/4451 cut-off events. [2024-11-17 03:43:52,609 INFO L125 PetriNetUnfolderBase]: For 39916/40000 co-relation queries the response was YES. [2024-11-17 03:43:52,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24179 conditions, 4451 events. 2260/4451 cut-off events. For 39916/40000 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 30839 event pairs, 305 based on Foata normal form. 9/4403 useless extension candidates. Maximal degree in co-relation 24135. Up to 1749 conditions per place. [2024-11-17 03:43:52,648 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 274 selfloop transitions, 174 changer transitions 1/457 dead transitions. [2024-11-17 03:43:52,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 457 transitions, 6156 flow [2024-11-17 03:43:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-17 03:43:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-17 03:43:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 673 transitions. [2024-11-17 03:43:52,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627090301003345 [2024-11-17 03:43:52,650 INFO L175 Difference]: Start difference. First operand has 156 places, 255 transitions, 3326 flow. Second operand 26 states and 673 transitions. [2024-11-17 03:43:52,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 457 transitions, 6156 flow [2024-11-17 03:43:52,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 457 transitions, 5913 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-11-17 03:43:52,763 INFO L231 Difference]: Finished difference. Result has 179 places, 332 transitions, 4683 flow [2024-11-17 03:43:52,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4683, PETRI_PLACES=179, PETRI_TRANSITIONS=332} [2024-11-17 03:43:52,764 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-11-17 03:43:52,764 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 332 transitions, 4683 flow [2024-11-17 03:43:52,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.692307692307693) internal successors, (564), 26 states have internal predecessors, (564), 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 03:43:52,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:43:52,765 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:43:52,782 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 03:43:52,965 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,SelfDestructingSolverStorable20 [2024-11-17 03:43:52,965 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-17 03:43:52,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:43:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2132916206, now seen corresponding path program 5 times [2024-11-17 03:43:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:43:52,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520001061] [2024-11-17 03:43:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:43:52,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:43:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:43:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:54,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:43:54,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520001061] [2024-11-17 03:43:54,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520001061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:43:54,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315741453] [2024-11-17 03:43:54,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:43:54,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:43:54,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:43:54,510 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 03:43:54,512 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 03:43:54,605 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-17 03:43:54,605 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:43:54,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-17 03:43:54,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:43:54,666 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 03:43:54,716 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 03:43:55,388 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-17 03:43:55,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2024-11-17 03:43:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:43:55,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:43:57,077 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 396 treesize of output 364 [2024-11-17 03:43:58,069 INFO L349 Elim1Store]: treesize reduction 5, result has 98.9 percent of original size [2024-11-17 03:43:58,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 16 new quantified variables, introduced 45 case distinctions, treesize of input 35343 treesize of output 22234