./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.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/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:30:26,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:30:26,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:30:26,877 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:30:26,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:30:26,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:30:26,907 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:30:26,908 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:30:26,909 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:30:26,909 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:30:26,909 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:30:26,910 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:30:26,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:30:26,911 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:30:26,911 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:30:26,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:30:26,912 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:30:26,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:30:26,913 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:30:26,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:30:26,913 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:30:26,918 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:30:26,918 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:30:26,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:30:26,919 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:30:26,919 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:30:26,919 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:30:26,919 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:30:26,920 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:30:26,920 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:30:26,920 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:30:26,921 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:30:26,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:30:26,924 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:30:26,924 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:30:26,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:30:26,925 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:30:26,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:30:26,925 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:30:26,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:30:26,926 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:30:26,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:30:26,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-17 03:30:27,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:30:27,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:30:27,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:30:27,226 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:30:27,226 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:30:27,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-17 03:30:28,749 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:30:28,976 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:30:28,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-17 03:30:28,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934fd7b31/c753b88525174a7ca55ea81562ef7aec/FLAGd617df6b8 [2024-11-17 03:30:29,333 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/934fd7b31/c753b88525174a7ca55ea81562ef7aec [2024-11-17 03:30:29,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:30:29,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:30:29,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:30:29,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:30:29,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:30:29,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b97a843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29, skipping insertion in model container [2024-11-17 03:30:29,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,363 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:30:29,544 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 03:30:29,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:30:29,557 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:30:29,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:30:29,597 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:30:29,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29 WrapperNode [2024-11-17 03:30:29,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:30:29,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:30:29,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:30:29,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:30:29,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,638 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 105 [2024-11-17 03:30:29,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:30:29,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:30:29,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:30:29,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:30:29,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,651 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,654 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,669 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-17 03:30:29,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,676 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,677 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,681 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,687 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:30:29,688 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:30:29,688 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:30:29,688 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:30:29,689 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (1/1) ... [2024-11-17 03:30:29,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:30:29,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:29,732 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 03:30:29,736 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 03:30:29,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:30:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:30:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:30:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:30:29,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:30:29,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:30:29,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:30:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:30:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:30:29,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:30:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:30:29,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:30:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:30:29,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:30:29,808 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 03:30:29,933 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:30:29,935 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:30:30,270 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:30:30,270 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:30:30,451 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:30:30,452 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:30:30,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:30 BoogieIcfgContainer [2024-11-17 03:30:30,452 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:30:30,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:30:30,455 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:30:30,458 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:30:30,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:30:29" (1/3) ... [2024-11-17 03:30:30,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c576a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:30, skipping insertion in model container [2024-11-17 03:30:30,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:30:29" (2/3) ... [2024-11-17 03:30:30,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c576a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:30:30, skipping insertion in model container [2024-11-17 03:30:30,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:30:30" (3/3) ... [2024-11-17 03:30:30,464 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-17 03:30:30,483 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:30:30,483 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-17 03:30:30,483 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:30:30,556 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-17 03:30:30,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 58 transitions, 130 flow [2024-11-17 03:30:30,641 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2024-11-17 03:30:30,641 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-17 03:30:30,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 56 events. 10/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 118 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-11-17 03:30:30,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 58 transitions, 130 flow [2024-11-17 03:30:30,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 55 transitions, 122 flow [2024-11-17 03:30:30,660 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:30:30,669 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;@42f656c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:30:30,670 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-17 03:30:30,680 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:30:30,680 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:30:30,680 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:30:30,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:30,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:30,682 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:30,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:30,689 INFO L85 PathProgramCache]: Analyzing trace with hash 12590641, now seen corresponding path program 1 times [2024-11-17 03:30:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371885285] [2024-11-17 03:30:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:30,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:30,989 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 03:30:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:30,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371885285] [2024-11-17 03:30:30,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371885285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:30:30,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936857663] [2024-11-17 03:30:30,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:31,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:31,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:31,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:31,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:30:31,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:30:31,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:31,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:30:31,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:31,208 INFO L124 PetriNetUnfolderBase]: 79/217 cut-off events. [2024-11-17 03:30:31,209 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-17 03:30:31,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 217 events. 79/217 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 930 event pairs, 26 based on Foata normal form. 28/148 useless extension candidates. Maximal degree in co-relation 293. Up to 110 conditions per place. [2024-11-17 03:30:31,215 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 18 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-17 03:30:31,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 146 flow [2024-11-17 03:30:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-11-17 03:30:31,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6724137931034483 [2024-11-17 03:30:31,247 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 122 flow. Second operand 3 states and 117 transitions. [2024-11-17 03:30:31,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 146 flow [2024-11-17 03:30:31,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:30:31,263 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 102 flow [2024-11-17 03:30:31,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-11-17 03:30:31,275 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-17 03:30:31,280 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 102 flow [2024-11-17 03:30:31,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 03:30:31,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:31,281 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:30:31,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:30:31,281 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:31,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash 12590642, now seen corresponding path program 1 times [2024-11-17 03:30:31,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:31,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287624662] [2024-11-17 03:30:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:31,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:31,632 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 03:30:31,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:31,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287624662] [2024-11-17 03:30:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287624662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:31,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271359573] [2024-11-17 03:30:31,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:31,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:31,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:31,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:30:31,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 03:30:31,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:31,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:30:31,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:31,832 INFO L124 PetriNetUnfolderBase]: 80/222 cut-off events. [2024-11-17 03:30:31,832 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:30:31,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 222 events. 80/222 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 953 event pairs, 26 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 317. Up to 119 conditions per place. [2024-11-17 03:30:31,835 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 21 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-17 03:30:31,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 158 flow [2024-11-17 03:30:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:30:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:30:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-11-17 03:30:31,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6293103448275862 [2024-11-17 03:30:31,837 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 102 flow. Second operand 4 states and 146 transitions. [2024-11-17 03:30:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 158 flow [2024-11-17 03:30:31,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:31,840 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 125 flow [2024-11-17 03:30:31,840 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-11-17 03:30:31,841 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-17 03:30:31,841 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 125 flow [2024-11-17 03:30:31,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 03:30:31,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:31,841 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:30:31,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:30:31,842 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:31,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1426037402, now seen corresponding path program 1 times [2024-11-17 03:30:31,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:31,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381515825] [2024-11-17 03:30:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:31,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:32,074 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 03:30:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:32,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381515825] [2024-11-17 03:30:32,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381515825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:32,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18418044] [2024-11-17 03:30:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:32,078 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 03:30:32,080 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 03:30:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:32,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:30:32,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:32,225 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 03:30:32,487 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 03:30:32,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:32,636 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 03:30:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18418044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:32,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:32,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:30:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917245013] [2024-11-17 03:30:32,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:32,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:30:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:30:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:30:32,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:30:32,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 125 flow. Second operand has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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 03:30:32,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:32,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:30:32,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:33,218 INFO L124 PetriNetUnfolderBase]: 81/226 cut-off events. [2024-11-17 03:30:33,219 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-17 03:30:33,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 226 events. 81/226 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 950 event pairs, 26 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 338. Up to 116 conditions per place. [2024-11-17 03:30:33,224 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 19 selfloop transitions, 12 changer transitions 0/54 dead transitions. [2024-11-17 03:30:33,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 54 transitions, 199 flow [2024-11-17 03:30:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:30:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:30:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 285 transitions. [2024-11-17 03:30:33,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-11-17 03:30:33,229 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 125 flow. Second operand 9 states and 285 transitions. [2024-11-17 03:30:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 54 transitions, 199 flow [2024-11-17 03:30:33,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 196 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:33,231 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 154 flow [2024-11-17 03:30:33,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=154, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-17 03:30:33,232 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-17 03:30:33,232 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 154 flow [2024-11-17 03:30:33,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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 03:30:33,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:33,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:33,250 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 03:30:33,434 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 03:30:33,435 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:33,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:33,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1424313803, now seen corresponding path program 1 times [2024-11-17 03:30:33,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:33,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224594525] [2024-11-17 03:30:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:33,619 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 03:30:33,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:33,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224594525] [2024-11-17 03:30:33,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224594525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:33,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596242795] [2024-11-17 03:30:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:33,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:33,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:33,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:30:33,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:33,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:33,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:30:33,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:33,867 INFO L124 PetriNetUnfolderBase]: 82/231 cut-off events. [2024-11-17 03:30:33,869 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-17 03:30:33,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 231 events. 82/231 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 26 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 349. Up to 119 conditions per place. [2024-11-17 03:30:33,871 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 22 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2024-11-17 03:30:33,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 55 transitions, 222 flow [2024-11-17 03:30:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:30:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:30:33,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-17 03:30:33,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137931034482759 [2024-11-17 03:30:33,874 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 154 flow. Second operand 5 states and 178 transitions. [2024-11-17 03:30:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 55 transitions, 222 flow [2024-11-17 03:30:33,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 184 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:30:33,880 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 158 flow [2024-11-17 03:30:33,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-17 03:30:33,881 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-17 03:30:33,881 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 158 flow [2024-11-17 03:30:33,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:33,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:33,882 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:33,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:30:33,882 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:33,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1750968600, now seen corresponding path program 1 times [2024-11-17 03:30:33,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:33,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921144078] [2024-11-17 03:30:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:34,101 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 03:30:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:34,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921144078] [2024-11-17 03:30:34,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921144078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:34,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011817674] [2024-11-17 03:30:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:34,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:34,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:34,104 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 03:30:34,106 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 03:30:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:34,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-17 03:30:34,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:34,206 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 03:30:34,384 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 03:30:34,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:34,590 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 03:30:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011817674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:34,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:34,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:30:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677533115] [2024-11-17 03:30:34,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:34,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:30:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:30:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:30:35,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:30:35,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 158 flow. Second operand has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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 03:30:35,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:35,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:30:35,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:35,448 INFO L124 PetriNetUnfolderBase]: 83/235 cut-off events. [2024-11-17 03:30:35,448 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-17 03:30:35,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 235 events. 83/235 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1000 event pairs, 26 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 333. Up to 111 conditions per place. [2024-11-17 03:30:35,453 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 20 selfloop transitions, 18 changer transitions 0/61 dead transitions. [2024-11-17 03:30:35,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 250 flow [2024-11-17 03:30:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:30:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:30:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 292 transitions. [2024-11-17 03:30:35,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5593869731800766 [2024-11-17 03:30:35,456 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 158 flow. Second operand 9 states and 292 transitions. [2024-11-17 03:30:35,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 250 flow [2024-11-17 03:30:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:35,458 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 196 flow [2024-11-17 03:30:35,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=196, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-11-17 03:30:35,459 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-17 03:30:35,459 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 196 flow [2024-11-17 03:30:35,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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 03:30:35,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:35,461 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:35,478 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 03:30:35,665 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 03:30:35,666 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:35,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1572646798, now seen corresponding path program 1 times [2024-11-17 03:30:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:35,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481358359] [2024-11-17 03:30:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:35,735 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 03:30:35,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:35,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481358359] [2024-11-17 03:30:35,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481358359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:35,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:35,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063583089] [2024-11-17 03:30:35,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:35,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:35,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:35,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:35,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 03:30:35,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:35,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:35,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:35,893 INFO L124 PetriNetUnfolderBase]: 119/364 cut-off events. [2024-11-17 03:30:35,894 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-17 03:30:35,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 641 conditions, 364 events. 119/364 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1835 event pairs, 46 based on Foata normal form. 7/237 useless extension candidates. Maximal degree in co-relation 392. Up to 144 conditions per place. [2024-11-17 03:30:35,898 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 53 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-17 03:30:35,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 400 flow [2024-11-17 03:30:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:30:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:30:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 192 transitions. [2024-11-17 03:30:35,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6620689655172414 [2024-11-17 03:30:35,900 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 196 flow. Second operand 5 states and 192 transitions. [2024-11-17 03:30:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 400 flow [2024-11-17 03:30:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 347 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:30:35,905 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 199 flow [2024-11-17 03:30:35,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-17 03:30:35,906 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-17 03:30:35,906 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 199 flow [2024-11-17 03:30:35,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 03:30:35,907 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:35,907 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:35,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:30:35,907 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:35,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash 140284349, now seen corresponding path program 1 times [2024-11-17 03:30:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639840721] [2024-11-17 03:30:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:35,973 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 03:30:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639840721] [2024-11-17 03:30:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639840721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:35,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758258039] [2024-11-17 03:30:35,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:35,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:35,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:36,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-17 03:30:36,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 03:30:36,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:36,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-17 03:30:36,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:36,093 INFO L124 PetriNetUnfolderBase]: 151/409 cut-off events. [2024-11-17 03:30:36,093 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-17 03:30:36,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 409 events. 151/409 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2070 event pairs, 69 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 511. Up to 217 conditions per place. [2024-11-17 03:30:36,097 INFO L140 encePairwiseOnDemand]: 54/58 looper letters, 31 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-11-17 03:30:36,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 267 flow [2024-11-17 03:30:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:30:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:30:36,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-17 03:30:36,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-11-17 03:30:36,099 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 199 flow. Second operand 4 states and 128 transitions. [2024-11-17 03:30:36,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 267 flow [2024-11-17 03:30:36,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:36,103 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 203 flow [2024-11-17 03:30:36,103 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-11-17 03:30:36,104 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-17 03:30:36,105 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 203 flow [2024-11-17 03:30:36,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 03:30:36,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:36,106 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:36,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:30:36,107 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:36,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash 140284350, now seen corresponding path program 1 times [2024-11-17 03:30:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504301385] [2024-11-17 03:30:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:36,204 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 03:30:36,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:36,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504301385] [2024-11-17 03:30:36,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504301385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:36,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:36,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706002386] [2024-11-17 03:30:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:36,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:30:36,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:36,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:30:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:30:36,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:36,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 03:30:36,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:36,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:36,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:36,335 INFO L124 PetriNetUnfolderBase]: 105/267 cut-off events. [2024-11-17 03:30:36,335 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-11-17 03:30:36,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 267 events. 105/267 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1226 event pairs, 45 based on Foata normal form. 2/197 useless extension candidates. Maximal degree in co-relation 367. Up to 151 conditions per place. [2024-11-17 03:30:36,339 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 51 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-11-17 03:30:36,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 373 flow [2024-11-17 03:30:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:30:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:30:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-11-17 03:30:36,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6551724137931034 [2024-11-17 03:30:36,341 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 203 flow. Second operand 5 states and 190 transitions. [2024-11-17 03:30:36,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 373 flow [2024-11-17 03:30:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 76 transitions, 365 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:30:36,345 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 211 flow [2024-11-17 03:30:36,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-11-17 03:30:36,346 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-11-17 03:30:36,346 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 211 flow [2024-11-17 03:30:36,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 03:30:36,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:36,346 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:36,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:30:36,347 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:36,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:36,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1458314022, now seen corresponding path program 1 times [2024-11-17 03:30:36,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:36,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740904776] [2024-11-17 03:30:36,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:36,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:36,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:36,417 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 03:30:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740904776] [2024-11-17 03:30:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740904776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:36,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:30:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049522622] [2024-11-17 03:30:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:36,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:36,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:36,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:36,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:36,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:36,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:36,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:36,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:36,593 INFO L124 PetriNetUnfolderBase]: 195/567 cut-off events. [2024-11-17 03:30:36,593 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-17 03:30:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 567 events. 195/567 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3287 event pairs, 59 based on Foata normal form. 7/408 useless extension candidates. Maximal degree in co-relation 827. Up to 147 conditions per place. [2024-11-17 03:30:36,597 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 53 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-11-17 03:30:36,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 396 flow [2024-11-17 03:30:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:30:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:30:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 226 transitions. [2024-11-17 03:30:36,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2024-11-17 03:30:36,599 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 211 flow. Second operand 6 states and 226 transitions. [2024-11-17 03:30:36,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 396 flow [2024-11-17 03:30:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 388 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:30:36,603 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 248 flow [2024-11-17 03:30:36,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2024-11-17 03:30:36,603 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-17 03:30:36,604 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 248 flow [2024-11-17 03:30:36,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:30:36,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:36,604 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:36,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:30:36,605 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:36,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1655067610, now seen corresponding path program 1 times [2024-11-17 03:30:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:36,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185598547] [2024-11-17 03:30:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:36,707 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 03:30:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185598547] [2024-11-17 03:30:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185598547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:36,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-17 03:30:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530439663] [2024-11-17 03:30:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:36,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:36,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:36,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 03:30:36,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:36,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:36,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:36,870 INFO L124 PetriNetUnfolderBase]: 227/622 cut-off events. [2024-11-17 03:30:36,871 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-17 03:30:36,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 622 events. 227/622 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3638 event pairs, 80 based on Foata normal form. 2/478 useless extension candidates. Maximal degree in co-relation 979. Up to 213 conditions per place. [2024-11-17 03:30:36,876 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 51 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2024-11-17 03:30:36,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 425 flow [2024-11-17 03:30:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:30:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:30:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-11-17 03:30:36,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6379310344827587 [2024-11-17 03:30:36,877 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 248 flow. Second operand 6 states and 222 transitions. [2024-11-17 03:30:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 425 flow [2024-11-17 03:30:36,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:30:36,880 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 281 flow [2024-11-17 03:30:36,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2024-11-17 03:30:36,881 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-11-17 03:30:36,881 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 281 flow [2024-11-17 03:30:36,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 03:30:36,882 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:36,882 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:36,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:30:36,882 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:36,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:36,883 INFO L85 PathProgramCache]: Analyzing trace with hash -791203875, now seen corresponding path program 1 times [2024-11-17 03:30:36,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:36,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690661459] [2024-11-17 03:30:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:36,984 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 03:30:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690661459] [2024-11-17 03:30:36,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690661459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:36,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:36,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:30:36,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349842734] [2024-11-17 03:30:36,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:36,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:30:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:30:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:30:37,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 58 [2024-11-17 03:30:37,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 03:30:37,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:37,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 58 [2024-11-17 03:30:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:37,140 INFO L124 PetriNetUnfolderBase]: 281/708 cut-off events. [2024-11-17 03:30:37,140 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-11-17 03:30:37,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1452 conditions, 708 events. 281/708 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4021 event pairs, 174 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1214. Up to 471 conditions per place. [2024-11-17 03:30:37,144 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 30 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-11-17 03:30:37,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 59 transitions, 353 flow [2024-11-17 03:30:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:30:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:30:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-17 03:30:37,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5310344827586206 [2024-11-17 03:30:37,146 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 281 flow. Second operand 5 states and 154 transitions. [2024-11-17 03:30:37,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 59 transitions, 353 flow [2024-11-17 03:30:37,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 59 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:30:37,148 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 282 flow [2024-11-17 03:30:37,149 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-17 03:30:37,149 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-17 03:30:37,150 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 282 flow [2024-11-17 03:30:37,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 03:30:37,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:37,150 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:37,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-17 03:30:37,151 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:37,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:37,151 INFO L85 PathProgramCache]: Analyzing trace with hash -791203874, now seen corresponding path program 1 times [2024-11-17 03:30:37,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:37,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740188662] [2024-11-17 03:30:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:37,341 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 03:30:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740188662] [2024-11-17 03:30:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740188662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768629395] [2024-11-17 03:30:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:37,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:37,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:37,345 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 03:30:37,346 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 03:30:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:37,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:30:37,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:37,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:30:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:37,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:30:37,538 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:30:37,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:30:37,620 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 03:30:37,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:37,795 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 61 treesize of output 57 [2024-11-17 03:30:37,880 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 03:30:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768629395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:37,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:37,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:30:37,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374244129] [2024-11-17 03:30:37,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:37,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:30:37,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:37,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:30:37,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:30:38,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:30:38,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 282 flow. Second operand has 11 states, 11 states have (on average 30.454545454545453) internal successors, (335), 11 states have internal predecessors, (335), 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 03:30:38,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:38,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:30:38,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:38,686 INFO L124 PetriNetUnfolderBase]: 282/686 cut-off events. [2024-11-17 03:30:38,687 INFO L125 PetriNetUnfolderBase]: For 239/239 co-relation queries the response was YES. [2024-11-17 03:30:38,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 686 events. 282/686 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3955 event pairs, 115 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 1176. Up to 180 conditions per place. [2024-11-17 03:30:38,691 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 55 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-11-17 03:30:38,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 521 flow [2024-11-17 03:30:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:30:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:30:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 283 transitions. [2024-11-17 03:30:38,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6099137931034483 [2024-11-17 03:30:38,693 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 282 flow. Second operand 8 states and 283 transitions. [2024-11-17 03:30:38,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 521 flow [2024-11-17 03:30:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 507 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:30:38,696 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 329 flow [2024-11-17 03:30:38,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=329, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-11-17 03:30:38,697 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-11-17 03:30:38,697 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 329 flow [2024-11-17 03:30:38,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.454545454545453) internal successors, (335), 11 states have internal predecessors, (335), 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 03:30:38,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:38,698 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:38,716 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 03:30:38,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:38,899 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:38,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1242484018, now seen corresponding path program 1 times [2024-11-17 03:30:38,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:38,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619118676] [2024-11-17 03:30:38,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:38,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:39,097 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 03:30:39,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619118676] [2024-11-17 03:30:39,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619118676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3876477] [2024-11-17 03:30:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:39,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:39,100 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 03:30:39,102 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 03:30:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:39,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:30:39,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:39,278 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 03:30:39,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:39,343 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 03:30:39,385 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 03:30:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3876477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:39,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:39,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-17 03:30:39,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284123053] [2024-11-17 03:30:39,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:39,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:30:39,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:30:39,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:30:39,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:30:39,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 329 flow. Second operand has 13 states, 13 states have (on average 31.692307692307693) internal successors, (412), 13 states have internal predecessors, (412), 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 03:30:39,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:39,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:30:39,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:39,933 INFO L124 PetriNetUnfolderBase]: 294/691 cut-off events. [2024-11-17 03:30:39,933 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2024-11-17 03:30:39,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 691 events. 294/691 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3881 event pairs, 83 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 1288. Up to 179 conditions per place. [2024-11-17 03:30:39,938 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 58 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2024-11-17 03:30:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 559 flow [2024-11-17 03:30:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:30:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:30:39,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 271 transitions. [2024-11-17 03:30:39,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6674876847290641 [2024-11-17 03:30:39,941 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 329 flow. Second operand 7 states and 271 transitions. [2024-11-17 03:30:39,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 559 flow [2024-11-17 03:30:39,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 539 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-17 03:30:39,944 INFO L231 Difference]: Finished difference. Result has 85 places, 63 transitions, 354 flow [2024-11-17 03:30:39,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=354, PETRI_PLACES=85, PETRI_TRANSITIONS=63} [2024-11-17 03:30:39,946 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-11-17 03:30:39,946 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 63 transitions, 354 flow [2024-11-17 03:30:39,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.692307692307693) internal successors, (412), 13 states have internal predecessors, (412), 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 03:30:39,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:39,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:39,966 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 03:30:40,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:40,147 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:40,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -512343447, now seen corresponding path program 1 times [2024-11-17 03:30:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:40,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876110544] [2024-11-17 03:30:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:40,350 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 03:30:40,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876110544] [2024-11-17 03:30:40,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876110544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:40,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516514533] [2024-11-17 03:30:40,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:40,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:40,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:40,353 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 03:30:40,355 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 03:30:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:40,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:30:40,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:40,544 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 03:30:40,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:40,605 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 03:30:40,642 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 03:30:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516514533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:40,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:40,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-17 03:30:40,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697758719] [2024-11-17 03:30:40,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:40,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:30:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:30:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:30:40,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:30:40,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 63 transitions, 354 flow. Second operand has 13 states, 13 states have (on average 32.15384615384615) internal successors, (418), 13 states have internal predecessors, (418), 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 03:30:40,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:40,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:30:40,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:41,219 INFO L124 PetriNetUnfolderBase]: 309/765 cut-off events. [2024-11-17 03:30:41,219 INFO L125 PetriNetUnfolderBase]: For 1134/1185 co-relation queries the response was YES. [2024-11-17 03:30:41,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 765 events. 309/765 cut-off events. For 1134/1185 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4461 event pairs, 95 based on Foata normal form. 0/661 useless extension candidates. Maximal degree in co-relation 1441. Up to 215 conditions per place. [2024-11-17 03:30:41,224 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 54 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-11-17 03:30:41,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 588 flow [2024-11-17 03:30:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:30:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:30:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 267 transitions. [2024-11-17 03:30:41,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6576354679802956 [2024-11-17 03:30:41,226 INFO L175 Difference]: Start difference. First operand has 85 places, 63 transitions, 354 flow. Second operand 7 states and 267 transitions. [2024-11-17 03:30:41,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 588 flow [2024-11-17 03:30:41,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 92 transitions, 558 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:30:41,230 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 373 flow [2024-11-17 03:30:41,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=373, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2024-11-17 03:30:41,231 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-17 03:30:41,231 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 373 flow [2024-11-17 03:30:41,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.15384615384615) internal successors, (418), 13 states have internal predecessors, (418), 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 03:30:41,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:41,232 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:41,250 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 03:30:41,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-17 03:30:41,433 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:41,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:41,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1297222677, now seen corresponding path program 1 times [2024-11-17 03:30:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:41,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340314818] [2024-11-17 03:30:41,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:41,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:41,610 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 03:30:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340314818] [2024-11-17 03:30:41,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340314818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:41,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859207859] [2024-11-17 03:30:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:41,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:41,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:41,614 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 03:30:41,616 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 03:30:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:41,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:30:41,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:41,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:30:41,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:30:41,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:30:41,796 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:30:41,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:30:41,907 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 03:30:41,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:42,083 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 61 treesize of output 57 [2024-11-17 03:30:42,172 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 03:30:42,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859207859] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:42,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:30:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661570995] [2024-11-17 03:30:42,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:42,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:30:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:42,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:30:42,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:30:42,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:30:42,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 373 flow. Second operand has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 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 03:30:42,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:42,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:30:42,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:42,804 INFO L124 PetriNetUnfolderBase]: 309/694 cut-off events. [2024-11-17 03:30:42,804 INFO L125 PetriNetUnfolderBase]: For 906/957 co-relation queries the response was YES. [2024-11-17 03:30:42,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1668 conditions, 694 events. 309/694 cut-off events. For 906/957 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3868 event pairs, 130 based on Foata normal form. 0/612 useless extension candidates. Maximal degree in co-relation 1414. Up to 214 conditions per place. [2024-11-17 03:30:42,809 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 53 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-11-17 03:30:42,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 607 flow [2024-11-17 03:30:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:30:42,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:30:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-17 03:30:42,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056034482758621 [2024-11-17 03:30:42,811 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 373 flow. Second operand 8 states and 281 transitions. [2024-11-17 03:30:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 607 flow [2024-11-17 03:30:42,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 92 transitions, 574 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-17 03:30:42,815 INFO L231 Difference]: Finished difference. Result has 94 places, 65 transitions, 387 flow [2024-11-17 03:30:42,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=94, PETRI_TRANSITIONS=65} [2024-11-17 03:30:42,816 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-11-17 03:30:42,816 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 65 transitions, 387 flow [2024-11-17 03:30:42,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.0) internal successors, (341), 11 states have internal predecessors, (341), 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 03:30:42,816 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:42,817 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:42,837 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 03:30:43,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-17 03:30:43,018 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:43,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash -549456215, now seen corresponding path program 1 times [2024-11-17 03:30:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047496178] [2024-11-17 03:30:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:43,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047496178] [2024-11-17 03:30:43,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047496178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:43,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465286319] [2024-11-17 03:30:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:43,117 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 03:30:43,119 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 03:30:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:43,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:30:43,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:43,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465286319] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:43,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-17 03:30:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768296867] [2024-11-17 03:30:43,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:43,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:30:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:30:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:30:43,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:43,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 65 transitions, 387 flow. Second operand has 15 states, 15 states have (on average 31.6) internal successors, (474), 15 states have internal predecessors, (474), 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 03:30:43,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:43,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:43,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:44,258 INFO L124 PetriNetUnfolderBase]: 771/1926 cut-off events. [2024-11-17 03:30:44,259 INFO L125 PetriNetUnfolderBase]: For 2819/3002 co-relation queries the response was YES. [2024-11-17 03:30:44,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4640 conditions, 1926 events. 771/1926 cut-off events. For 2819/3002 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14674 event pairs, 315 based on Foata normal form. 48/1797 useless extension candidates. Maximal degree in co-relation 2450. Up to 263 conditions per place. [2024-11-17 03:30:44,274 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 164 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2024-11-17 03:30:44,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 223 transitions, 1378 flow [2024-11-17 03:30:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-17 03:30:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-17 03:30:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1182 transitions. [2024-11-17 03:30:44,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5993914807302231 [2024-11-17 03:30:44,278 INFO L175 Difference]: Start difference. First operand has 94 places, 65 transitions, 387 flow. Second operand 34 states and 1182 transitions. [2024-11-17 03:30:44,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 223 transitions, 1378 flow [2024-11-17 03:30:44,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 223 transitions, 1347 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:30:44,285 INFO L231 Difference]: Finished difference. Result has 131 places, 84 transitions, 616 flow [2024-11-17 03:30:44,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=616, PETRI_PLACES=131, PETRI_TRANSITIONS=84} [2024-11-17 03:30:44,286 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-11-17 03:30:44,286 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 84 transitions, 616 flow [2024-11-17 03:30:44,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 31.6) internal successors, (474), 15 states have internal predecessors, (474), 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 03:30:44,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:44,287 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:44,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-17 03:30:44,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:44,492 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:44,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -442810499, now seen corresponding path program 1 times [2024-11-17 03:30:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:44,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148681675] [2024-11-17 03:30:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:44,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:30:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:44,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148681675] [2024-11-17 03:30:44,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148681675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:30:44,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:30:44,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:30:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193818916] [2024-11-17 03:30:44,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:30:44,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:30:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:44,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:30:44,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:30:44,565 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 58 [2024-11-17 03:30:44,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 84 transitions, 616 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 03:30:44,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:44,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 58 [2024-11-17 03:30:44,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:44,763 INFO L124 PetriNetUnfolderBase]: 654/1802 cut-off events. [2024-11-17 03:30:44,764 INFO L125 PetriNetUnfolderBase]: For 3726/3985 co-relation queries the response was YES. [2024-11-17 03:30:44,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4396 conditions, 1802 events. 654/1802 cut-off events. For 3726/3985 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14133 event pairs, 182 based on Foata normal form. 9/1703 useless extension candidates. Maximal degree in co-relation 4341. Up to 844 conditions per place. [2024-11-17 03:30:44,778 INFO L140 encePairwiseOnDemand]: 54/58 looper letters, 49 selfloop transitions, 6 changer transitions 15/98 dead transitions. [2024-11-17 03:30:44,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 98 transitions, 829 flow [2024-11-17 03:30:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:30:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:30:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-17 03:30:44,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.735632183908046 [2024-11-17 03:30:44,780 INFO L175 Difference]: Start difference. First operand has 131 places, 84 transitions, 616 flow. Second operand 3 states and 128 transitions. [2024-11-17 03:30:44,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 98 transitions, 829 flow [2024-11-17 03:30:44,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 98 transitions, 791 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-17 03:30:44,786 INFO L231 Difference]: Finished difference. Result has 128 places, 75 transitions, 523 flow [2024-11-17 03:30:44,786 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=523, PETRI_PLACES=128, PETRI_TRANSITIONS=75} [2024-11-17 03:30:44,787 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 76 predicate places. [2024-11-17 03:30:44,787 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 75 transitions, 523 flow [2024-11-17 03:30:44,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 03:30:44,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:44,788 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:44,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:30:44,788 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:44,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -13000820, now seen corresponding path program 1 times [2024-11-17 03:30:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:44,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308693787] [2024-11-17 03:30:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:44,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:44,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308693787] [2024-11-17 03:30:44,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308693787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:44,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990998006] [2024-11-17 03:30:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:44,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:44,881 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 03:30:44,882 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 03:30:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:44,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-17 03:30:44,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:45,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:30:45,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990998006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:45,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:45,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-17 03:30:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478147108] [2024-11-17 03:30:45,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:45,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:30:45,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:45,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:30:45,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:30:45,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 58 [2024-11-17 03:30:45,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 75 transitions, 523 flow. Second operand has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 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 03:30:45,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:30:45,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 58 [2024-11-17 03:30:45,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:30:45,796 INFO L124 PetriNetUnfolderBase]: 562/1358 cut-off events. [2024-11-17 03:30:45,796 INFO L125 PetriNetUnfolderBase]: For 4238/4435 co-relation queries the response was YES. [2024-11-17 03:30:45,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3607 conditions, 1358 events. 562/1358 cut-off events. For 4238/4435 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9750 event pairs, 212 based on Foata normal form. 36/1240 useless extension candidates. Maximal degree in co-relation 3555. Up to 245 conditions per place. [2024-11-17 03:30:45,809 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 99 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2024-11-17 03:30:45,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 150 transitions, 1068 flow [2024-11-17 03:30:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-17 03:30:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-17 03:30:45,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 763 transitions. [2024-11-17 03:30:45,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5979623824451411 [2024-11-17 03:30:45,811 INFO L175 Difference]: Start difference. First operand has 128 places, 75 transitions, 523 flow. Second operand 22 states and 763 transitions. [2024-11-17 03:30:45,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 150 transitions, 1068 flow [2024-11-17 03:30:45,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 984 flow, removed 14 selfloop flow, removed 13 redundant places. [2024-11-17 03:30:45,819 INFO L231 Difference]: Finished difference. Result has 121 places, 81 transitions, 605 flow [2024-11-17 03:30:45,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=605, PETRI_PLACES=121, PETRI_TRANSITIONS=81} [2024-11-17 03:30:45,820 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-17 03:30:45,820 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 81 transitions, 605 flow [2024-11-17 03:30:45,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 32.0) internal successors, (480), 15 states have internal predecessors, (480), 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 03:30:45,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:30:45,821 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:30:45,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:30:46,021 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,SelfDestructingSolverStorable17 [2024-11-17 03:30:46,021 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:30:46,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:30:46,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1833546476, now seen corresponding path program 2 times [2024-11-17 03:30:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:30:46,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623199711] [2024-11-17 03:30:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:30:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:30:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:30:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:30:46,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:30:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623199711] [2024-11-17 03:30:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623199711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:30:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118386216] [2024-11-17 03:30:46,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:30:46,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:30:46,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:30:46,345 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 03:30:46,346 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 03:30:46,413 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:30:46,413 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:30:46,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-17 03:30:46,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:30:46,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:30:46,516 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:30:46,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:30:46,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:30:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:30:46,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:30:46,822 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 61 treesize of output 57 [2024-11-17 03:30:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:30:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118386216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:30:46,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:30:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2024-11-17 03:30:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986927804] [2024-11-17 03:30:46,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:30:46,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:30:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:30:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:30:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:30:51,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:30:55,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:30:59,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:31:03,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-17 03:31:03,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2024-11-17 03:31:03,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 81 transitions, 605 flow. Second operand has 19 states, 19 states have (on average 26.105263157894736) internal successors, (496), 19 states have internal predecessors, (496), 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 03:31:03,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:03,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2024-11-17 03:31:03,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:04,355 INFO L124 PetriNetUnfolderBase]: 758/1768 cut-off events. [2024-11-17 03:31:04,355 INFO L125 PetriNetUnfolderBase]: For 3249/3381 co-relation queries the response was YES. [2024-11-17 03:31:04,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 1768 events. 758/1768 cut-off events. For 3249/3381 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12633 event pairs, 305 based on Foata normal form. 20/1598 useless extension candidates. Maximal degree in co-relation 4626. Up to 399 conditions per place. [2024-11-17 03:31:04,365 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 72 selfloop transitions, 25 changer transitions 0/122 dead transitions. [2024-11-17 03:31:04,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 122 transitions, 977 flow [2024-11-17 03:31:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:31:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:31:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 342 transitions. [2024-11-17 03:31:04,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5360501567398119 [2024-11-17 03:31:04,366 INFO L175 Difference]: Start difference. First operand has 121 places, 81 transitions, 605 flow. Second operand 11 states and 342 transitions. [2024-11-17 03:31:04,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 122 transitions, 977 flow [2024-11-17 03:31:04,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 941 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-11-17 03:31:04,372 INFO L231 Difference]: Finished difference. Result has 119 places, 85 transitions, 670 flow [2024-11-17 03:31:04,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=670, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2024-11-17 03:31:04,373 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 67 predicate places. [2024-11-17 03:31:04,373 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 670 flow [2024-11-17 03:31:04,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 26.105263157894736) internal successors, (496), 19 states have internal predecessors, (496), 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 03:31:04,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:04,373 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:04,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-17 03:31:04,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:04,574 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:04,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:04,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1005365572, now seen corresponding path program 1 times [2024-11-17 03:31:04,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:04,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611084300] [2024-11-17 03:31:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:04,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611084300] [2024-11-17 03:31:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611084300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:04,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189195485] [2024-11-17 03:31:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:04,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:04,802 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 03:31:04,805 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 03:31:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:04,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:31:04,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:05,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:05,123 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 30 treesize of output 26 [2024-11-17 03:31:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189195485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:05,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:05,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-17 03:31:05,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721848909] [2024-11-17 03:31:05,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:05,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:31:05,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:31:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:31:05,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 58 [2024-11-17 03:31:05,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 670 flow. Second operand has 19 states, 19 states have (on average 31.894736842105264) internal successors, (606), 19 states have internal predecessors, (606), 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 03:31:05,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:05,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 58 [2024-11-17 03:31:05,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:06,178 INFO L124 PetriNetUnfolderBase]: 781/1803 cut-off events. [2024-11-17 03:31:06,179 INFO L125 PetriNetUnfolderBase]: For 4083/4257 co-relation queries the response was YES. [2024-11-17 03:31:06,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4874 conditions, 1803 events. 781/1803 cut-off events. For 4083/4257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12913 event pairs, 218 based on Foata normal form. 20/1688 useless extension candidates. Maximal degree in co-relation 4821. Up to 327 conditions per place. [2024-11-17 03:31:06,195 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 91 selfloop transitions, 25 changer transitions 0/143 dead transitions. [2024-11-17 03:31:06,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 143 transitions, 1108 flow [2024-11-17 03:31:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:31:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:31:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 393 transitions. [2024-11-17 03:31:06,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6775862068965517 [2024-11-17 03:31:06,200 INFO L175 Difference]: Start difference. First operand has 119 places, 85 transitions, 670 flow. Second operand 10 states and 393 transitions. [2024-11-17 03:31:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 143 transitions, 1108 flow [2024-11-17 03:31:06,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 143 transitions, 1093 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-17 03:31:06,207 INFO L231 Difference]: Finished difference. Result has 127 places, 87 transitions, 736 flow [2024-11-17 03:31:06,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=736, PETRI_PLACES=127, PETRI_TRANSITIONS=87} [2024-11-17 03:31:06,208 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 75 predicate places. [2024-11-17 03:31:06,208 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 87 transitions, 736 flow [2024-11-17 03:31:06,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 31.894736842105264) internal successors, (606), 19 states have internal predecessors, (606), 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 03:31:06,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:06,209 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:06,225 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 03:31:06,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:06,409 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:06,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1368127689, now seen corresponding path program 2 times [2024-11-17 03:31:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873445792] [2024-11-17 03:31:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873445792] [2024-11-17 03:31:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873445792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531645820] [2024-11-17 03:31:06,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:06,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:06,650 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 03:31:06,652 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 03:31:06,730 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:31:06,730 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:06,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:31:06,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:31:06,923 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:07,175 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 42 treesize of output 38 [2024-11-17 03:31:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:31:07,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531645820] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:07,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:07,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-17 03:31:07,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481904738] [2024-11-17 03:31:07,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:07,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-17 03:31:07,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:07,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-17 03:31:07,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2024-11-17 03:31:08,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 58 [2024-11-17 03:31:08,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 87 transitions, 736 flow. Second operand has 23 states, 23 states have (on average 29.391304347826086) internal successors, (676), 23 states have internal predecessors, (676), 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 03:31:08,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:08,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 58 [2024-11-17 03:31:08,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:08,931 INFO L124 PetriNetUnfolderBase]: 1115/2552 cut-off events. [2024-11-17 03:31:08,931 INFO L125 PetriNetUnfolderBase]: For 9906/10207 co-relation queries the response was YES. [2024-11-17 03:31:08,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7078 conditions, 2552 events. 1115/2552 cut-off events. For 9906/10207 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19234 event pairs, 397 based on Foata normal form. 54/2475 useless extension candidates. Maximal degree in co-relation 7022. Up to 543 conditions per place. [2024-11-17 03:31:08,948 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 80 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-11-17 03:31:08,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 134 transitions, 1201 flow [2024-11-17 03:31:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-17 03:31:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-17 03:31:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 571 transitions. [2024-11-17 03:31:08,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5469348659003831 [2024-11-17 03:31:08,950 INFO L175 Difference]: Start difference. First operand has 127 places, 87 transitions, 736 flow. Second operand 18 states and 571 transitions. [2024-11-17 03:31:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 134 transitions, 1201 flow [2024-11-17 03:31:08,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 134 transitions, 1152 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:08,960 INFO L231 Difference]: Finished difference. Result has 139 places, 88 transitions, 771 flow [2024-11-17 03:31:08,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=771, PETRI_PLACES=139, PETRI_TRANSITIONS=88} [2024-11-17 03:31:08,961 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2024-11-17 03:31:08,961 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 88 transitions, 771 flow [2024-11-17 03:31:08,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 29.391304347826086) internal successors, (676), 23 states have internal predecessors, (676), 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 03:31:08,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:08,961 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:08,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-17 03:31:09,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-17 03:31:09,166 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:09,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:09,166 INFO L85 PathProgramCache]: Analyzing trace with hash 537714951, now seen corresponding path program 1 times [2024-11-17 03:31:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746600673] [2024-11-17 03:31:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:09,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746600673] [2024-11-17 03:31:09,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746600673] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:09,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592384236] [2024-11-17 03:31:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:09,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:09,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:09,437 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 03:31:09,438 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 03:31:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:09,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-17 03:31:09,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:09,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:31:09,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:09,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-17 03:31:09,635 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:09,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:31:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:09,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:09,930 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 61 treesize of output 57 [2024-11-17 03:31:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592384236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:10,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:10,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-17 03:31:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773012336] [2024-11-17 03:31:10,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:10,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-17 03:31:10,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-17 03:31:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-17 03:31:10,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:10,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 88 transitions, 771 flow. Second operand has 18 states, 18 states have (on average 30.555555555555557) internal successors, (550), 18 states have internal predecessors, (550), 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 03:31:10,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:10,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:11,246 INFO L124 PetriNetUnfolderBase]: 1006/2248 cut-off events. [2024-11-17 03:31:11,246 INFO L125 PetriNetUnfolderBase]: For 8373/8622 co-relation queries the response was YES. [2024-11-17 03:31:11,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6355 conditions, 2248 events. 1006/2248 cut-off events. For 8373/8622 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 16566 event pairs, 388 based on Foata normal form. 27/2100 useless extension candidates. Maximal degree in co-relation 6296. Up to 549 conditions per place. [2024-11-17 03:31:11,258 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 72 selfloop transitions, 25 changer transitions 0/126 dead transitions. [2024-11-17 03:31:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 126 transitions, 1198 flow [2024-11-17 03:31:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-17 03:31:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-17 03:31:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 382 transitions. [2024-11-17 03:31:11,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5987460815047022 [2024-11-17 03:31:11,260 INFO L175 Difference]: Start difference. First operand has 139 places, 88 transitions, 771 flow. Second operand 11 states and 382 transitions. [2024-11-17 03:31:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 126 transitions, 1198 flow [2024-11-17 03:31:11,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 126 transitions, 1124 flow, removed 6 selfloop flow, removed 15 redundant places. [2024-11-17 03:31:11,267 INFO L231 Difference]: Finished difference. Result has 136 places, 90 transitions, 778 flow [2024-11-17 03:31:11,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=778, PETRI_PLACES=136, PETRI_TRANSITIONS=90} [2024-11-17 03:31:11,267 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 84 predicate places. [2024-11-17 03:31:11,267 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 90 transitions, 778 flow [2024-11-17 03:31:11,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.555555555555557) internal successors, (550), 18 states have internal predecessors, (550), 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 03:31:11,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:11,268 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:11,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:11,468 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,SelfDestructingSolverStorable21 [2024-11-17 03:31:11,468 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:11,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1232120627, now seen corresponding path program 3 times [2024-11-17 03:31:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:11,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901158199] [2024-11-17 03:31:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:11,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:11,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:11,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901158199] [2024-11-17 03:31:11,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901158199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:11,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953979350] [2024-11-17 03:31:11,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:31:11,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:11,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:11,606 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 03:31:11,607 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 03:31:11,682 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:31:11,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:11,684 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-17 03:31:11,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:11,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:31:11,779 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:11,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:31:11,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:31:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:31:11,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:12,180 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 42 treesize of output 38 [2024-11-17 03:31:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-17 03:31:12,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953979350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:12,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:12,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-17 03:31:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125688253] [2024-11-17 03:31:12,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:12,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-17 03:31:12,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-17 03:31:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2024-11-17 03:31:13,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2024-11-17 03:31:13,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 90 transitions, 778 flow. Second operand has 24 states, 24 states have (on average 26.333333333333332) internal successors, (632), 24 states have internal predecessors, (632), 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 03:31:13,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:13,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2024-11-17 03:31:13,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:14,500 INFO L124 PetriNetUnfolderBase]: 2272/5305 cut-off events. [2024-11-17 03:31:14,501 INFO L125 PetriNetUnfolderBase]: For 15198/15208 co-relation queries the response was YES. [2024-11-17 03:31:14,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15918 conditions, 5305 events. 2272/5305 cut-off events. For 15198/15208 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 44133 event pairs, 527 based on Foata normal form. 60/5252 useless extension candidates. Maximal degree in co-relation 12604. Up to 686 conditions per place. [2024-11-17 03:31:14,533 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 199 selfloop transitions, 51 changer transitions 0/269 dead transitions. [2024-11-17 03:31:14,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 269 transitions, 2393 flow [2024-11-17 03:31:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:31:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:31:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 741 transitions. [2024-11-17 03:31:14,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5323275862068966 [2024-11-17 03:31:14,536 INFO L175 Difference]: Start difference. First operand has 136 places, 90 transitions, 778 flow. Second operand 24 states and 741 transitions. [2024-11-17 03:31:14,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 269 transitions, 2393 flow [2024-11-17 03:31:14,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 269 transitions, 2344 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:31:14,560 INFO L231 Difference]: Finished difference. Result has 154 places, 107 transitions, 1051 flow [2024-11-17 03:31:14,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1051, PETRI_PLACES=154, PETRI_TRANSITIONS=107} [2024-11-17 03:31:14,561 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-11-17 03:31:14,561 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 107 transitions, 1051 flow [2024-11-17 03:31:14,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 26.333333333333332) internal successors, (632), 24 states have internal predecessors, (632), 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 03:31:14,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:14,562 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:14,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-17 03:31:14,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-17 03:31:14,766 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:14,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1219806533, now seen corresponding path program 1 times [2024-11-17 03:31:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763055223] [2024-11-17 03:31:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763055223] [2024-11-17 03:31:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763055223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600610611] [2024-11-17 03:31:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:14,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:14,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:14,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-17 03:31:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:15,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:31:15,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:15,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:31:15,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600610611] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:15,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:31:15,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2024-11-17 03:31:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014044944] [2024-11-17 03:31:15,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:15,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:31:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:31:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:31:15,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:15,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 107 transitions, 1051 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 03:31:15,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:15,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:15,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:15,724 INFO L124 PetriNetUnfolderBase]: 1763/4204 cut-off events. [2024-11-17 03:31:15,724 INFO L125 PetriNetUnfolderBase]: For 18254/18858 co-relation queries the response was YES. [2024-11-17 03:31:15,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12411 conditions, 4204 events. 1763/4204 cut-off events. For 18254/18858 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 35875 event pairs, 591 based on Foata normal form. 46/3961 useless extension candidates. Maximal degree in co-relation 9845. Up to 1312 conditions per place. [2024-11-17 03:31:15,745 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 82 selfloop transitions, 18 changer transitions 0/131 dead transitions. [2024-11-17 03:31:15,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 131 transitions, 1433 flow [2024-11-17 03:31:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:31:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:31:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-17 03:31:15,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-11-17 03:31:15,747 INFO L175 Difference]: Start difference. First operand has 154 places, 107 transitions, 1051 flow. Second operand 7 states and 242 transitions. [2024-11-17 03:31:15,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 131 transitions, 1433 flow [2024-11-17 03:31:15,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 131 transitions, 1292 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-11-17 03:31:15,763 INFO L231 Difference]: Finished difference. Result has 149 places, 108 transitions, 989 flow [2024-11-17 03:31:15,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=989, PETRI_PLACES=149, PETRI_TRANSITIONS=108} [2024-11-17 03:31:15,764 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2024-11-17 03:31:15,764 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 108 transitions, 989 flow [2024-11-17 03:31:15,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 03:31:15,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:15,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:15,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-17 03:31:15,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:15,966 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:15,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1645189781, now seen corresponding path program 1 times [2024-11-17 03:31:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:15,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031198923] [2024-11-17 03:31:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:15,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:16,139 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 03:31:16,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031198923] [2024-11-17 03:31:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031198923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825430263] [2024-11-17 03:31:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:16,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:16,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:16,142 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:16,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-17 03:31:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:16,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:31:16,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:16,332 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 03:31:16,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:31:16,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825430263] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:16,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-17 03:31:16,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 16 [2024-11-17 03:31:16,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770243864] [2024-11-17 03:31:16,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:16,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:31:16,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:31:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:31:16,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:16,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 108 transitions, 989 flow. Second operand has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 03:31:16,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:16,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:16,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:16,751 INFO L124 PetriNetUnfolderBase]: 1503/3461 cut-off events. [2024-11-17 03:31:16,751 INFO L125 PetriNetUnfolderBase]: For 17637/18020 co-relation queries the response was YES. [2024-11-17 03:31:16,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11190 conditions, 3461 events. 1503/3461 cut-off events. For 17637/18020 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 28056 event pairs, 505 based on Foata normal form. 104/3290 useless extension candidates. Maximal degree in co-relation 9070. Up to 1237 conditions per place. [2024-11-17 03:31:16,766 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 78 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-11-17 03:31:16,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 132 transitions, 1324 flow [2024-11-17 03:31:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:31:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:31:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 246 transitions. [2024-11-17 03:31:16,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6059113300492611 [2024-11-17 03:31:16,768 INFO L175 Difference]: Start difference. First operand has 149 places, 108 transitions, 989 flow. Second operand 7 states and 246 transitions. [2024-11-17 03:31:16,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 132 transitions, 1324 flow [2024-11-17 03:31:16,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 132 transitions, 1287 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:16,781 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 1019 flow [2024-11-17 03:31:16,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1019, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2024-11-17 03:31:16,782 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-11-17 03:31:16,782 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 1019 flow [2024-11-17 03:31:16,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.333333333333332) internal successors, (188), 6 states have internal predecessors, (188), 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 03:31:16,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:16,782 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:16,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-17 03:31:16,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:16,987 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:16,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash 433636768, now seen corresponding path program 2 times [2024-11-17 03:31:16,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:16,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185212532] [2024-11-17 03:31:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:16,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-17 03:31:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185212532] [2024-11-17 03:31:17,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185212532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781641453] [2024-11-17 03:31:17,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:31:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:17,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:17,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-17 03:31:17,244 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-17 03:31:17,244 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:17,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:31:17,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:17,265 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 03:31:17,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-17 03:31:17,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:31:17,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-17 03:31:17,377 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-17 03:31:17,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-17 03:31:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-17 03:31:17,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-17 03:31:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781641453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:18,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:18,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-17 03:31:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906965687] [2024-11-17 03:31:18,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:18,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-17 03:31:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-17 03:31:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-17 03:31:19,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 58 [2024-11-17 03:31:19,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 1019 flow. Second operand has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 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 03:31:19,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:19,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 58 [2024-11-17 03:31:19,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:19,945 INFO L124 PetriNetUnfolderBase]: 1684/3634 cut-off events. [2024-11-17 03:31:19,945 INFO L125 PetriNetUnfolderBase]: For 17504/17960 co-relation queries the response was YES. [2024-11-17 03:31:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11804 conditions, 3634 events. 1684/3634 cut-off events. For 17504/17960 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 28596 event pairs, 102 based on Foata normal form. 49/3574 useless extension candidates. Maximal degree in co-relation 10098. Up to 540 conditions per place. [2024-11-17 03:31:19,965 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 160 selfloop transitions, 41 changer transitions 0/226 dead transitions. [2024-11-17 03:31:19,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 226 transitions, 2218 flow [2024-11-17 03:31:19,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-17 03:31:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-17 03:31:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 672 transitions. [2024-11-17 03:31:19,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5266457680250783 [2024-11-17 03:31:19,966 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 1019 flow. Second operand 22 states and 672 transitions. [2024-11-17 03:31:19,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 226 transitions, 2218 flow [2024-11-17 03:31:19,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 226 transitions, 2098 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:31:19,984 INFO L231 Difference]: Finished difference. Result has 162 places, 116 transitions, 1135 flow [2024-11-17 03:31:19,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1135, PETRI_PLACES=162, PETRI_TRANSITIONS=116} [2024-11-17 03:31:19,985 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 110 predicate places. [2024-11-17 03:31:19,985 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 116 transitions, 1135 flow [2024-11-17 03:31:19,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 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 03:31:19,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:19,986 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:20,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-17 03:31:20,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-17 03:31:20,191 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:20,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash -259181765, now seen corresponding path program 1 times [2024-11-17 03:31:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:20,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694052505] [2024-11-17 03:31:20,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:20,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694052505] [2024-11-17 03:31:20,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694052505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:20,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152592035] [2024-11-17 03:31:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:20,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:20,579 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:20,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-17 03:31:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:20,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:31:20,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:20,836 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-17 03:31:20,836 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 26 treesize of output 10 [2024-11-17 03:31:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:20,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:20,985 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-17 03:31:20,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-17 03:31:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:21,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152592035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:21,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:21,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-17 03:31:21,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798296172] [2024-11-17 03:31:21,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:21,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:31:21,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:21,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:31:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:31:21,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:21,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 116 transitions, 1135 flow. Second operand has 21 states, 21 states have (on average 30.80952380952381) internal successors, (647), 21 states have internal predecessors, (647), 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 03:31:21,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:21,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:21,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:22,179 INFO L124 PetriNetUnfolderBase]: 2264/5009 cut-off events. [2024-11-17 03:31:22,179 INFO L125 PetriNetUnfolderBase]: For 17018/17018 co-relation queries the response was YES. [2024-11-17 03:31:22,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16751 conditions, 5009 events. 2264/5009 cut-off events. For 17018/17018 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 37471 event pairs, 286 based on Foata normal form. 67/5022 useless extension candidates. Maximal degree in co-relation 14384. Up to 2191 conditions per place. [2024-11-17 03:31:22,204 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 127 selfloop transitions, 56 changer transitions 1/209 dead transitions. [2024-11-17 03:31:22,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2272 flow [2024-11-17 03:31:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:31:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:31:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 368 transitions. [2024-11-17 03:31:22,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6344827586206897 [2024-11-17 03:31:22,206 INFO L175 Difference]: Start difference. First operand has 162 places, 116 transitions, 1135 flow. Second operand 10 states and 368 transitions. [2024-11-17 03:31:22,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2272 flow [2024-11-17 03:31:22,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 2086 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-11-17 03:31:22,229 INFO L231 Difference]: Finished difference. Result has 163 places, 146 transitions, 1583 flow [2024-11-17 03:31:22,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1583, PETRI_PLACES=163, PETRI_TRANSITIONS=146} [2024-11-17 03:31:22,229 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-11-17 03:31:22,230 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 146 transitions, 1583 flow [2024-11-17 03:31:22,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.80952380952381) internal successors, (647), 21 states have internal predecessors, (647), 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 03:31:22,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:22,230 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:22,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:22,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-17 03:31:22,435 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:22,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1801580285, now seen corresponding path program 2 times [2024-11-17 03:31:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:22,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483008497] [2024-11-17 03:31:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:22,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:22,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483008497] [2024-11-17 03:31:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483008497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:22,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:22,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226491448] [2024-11-17 03:31:22,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:22,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:23,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:23,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 146 transitions, 1583 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:23,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:23,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:23,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:23,626 INFO L124 PetriNetUnfolderBase]: 2312/5099 cut-off events. [2024-11-17 03:31:23,627 INFO L125 PetriNetUnfolderBase]: For 18155/18251 co-relation queries the response was YES. [2024-11-17 03:31:23,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18192 conditions, 5099 events. 2312/5099 cut-off events. For 18155/18251 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 38453 event pairs, 651 based on Foata normal form. 36/5053 useless extension candidates. Maximal degree in co-relation 13778. Up to 3317 conditions per place. [2024-11-17 03:31:23,657 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 122 selfloop transitions, 53 changer transitions 17/217 dead transitions. [2024-11-17 03:31:23,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 217 transitions, 2728 flow [2024-11-17 03:31:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 319 transitions. [2024-11-17 03:31:23,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-17 03:31:23,659 INFO L175 Difference]: Start difference. First operand has 163 places, 146 transitions, 1583 flow. Second operand 9 states and 319 transitions. [2024-11-17 03:31:23,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 217 transitions, 2728 flow [2024-11-17 03:31:23,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 217 transitions, 2617 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-11-17 03:31:23,707 INFO L231 Difference]: Finished difference. Result has 172 places, 167 transitions, 2085 flow [2024-11-17 03:31:23,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2085, PETRI_PLACES=172, PETRI_TRANSITIONS=167} [2024-11-17 03:31:23,708 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-11-17 03:31:23,708 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 167 transitions, 2085 flow [2024-11-17 03:31:23,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:23,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:23,709 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:23,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-17 03:31:23,709 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:23,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1230672591, now seen corresponding path program 3 times [2024-11-17 03:31:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257002134] [2024-11-17 03:31:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257002134] [2024-11-17 03:31:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257002134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:24,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:24,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195998441] [2024-11-17 03:31:24,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:24,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:24,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:24,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:24,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:24,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 167 transitions, 2085 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:24,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:24,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:24,983 INFO L124 PetriNetUnfolderBase]: 2336/5099 cut-off events. [2024-11-17 03:31:24,983 INFO L125 PetriNetUnfolderBase]: For 20553/20553 co-relation queries the response was YES. [2024-11-17 03:31:24,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19212 conditions, 5099 events. 2336/5099 cut-off events. For 20553/20553 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 38307 event pairs, 836 based on Foata normal form. 24/5037 useless extension candidates. Maximal degree in co-relation 16298. Up to 3353 conditions per place. [2024-11-17 03:31:25,017 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 105 selfloop transitions, 81 changer transitions 7/218 dead transitions. [2024-11-17 03:31:25,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 218 transitions, 3072 flow [2024-11-17 03:31:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 320 transitions. [2024-11-17 03:31:25,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130268199233716 [2024-11-17 03:31:25,018 INFO L175 Difference]: Start difference. First operand has 172 places, 167 transitions, 2085 flow. Second operand 9 states and 320 transitions. [2024-11-17 03:31:25,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 218 transitions, 3072 flow [2024-11-17 03:31:25,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2855 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:25,089 INFO L231 Difference]: Finished difference. Result has 175 places, 190 transitions, 2592 flow [2024-11-17 03:31:25,089 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2592, PETRI_PLACES=175, PETRI_TRANSITIONS=190} [2024-11-17 03:31:25,090 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 123 predicate places. [2024-11-17 03:31:25,090 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 190 transitions, 2592 flow [2024-11-17 03:31:25,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:25,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:25,091 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:25,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-17 03:31:25,091 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:25,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1408243091, now seen corresponding path program 4 times [2024-11-17 03:31:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:25,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790139387] [2024-11-17 03:31:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790139387] [2024-11-17 03:31:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790139387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:25,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:25,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:25,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55149465] [2024-11-17 03:31:25,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:25,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:25,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:25,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:25,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 190 transitions, 2592 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:25,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:25,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:25,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:26,189 INFO L124 PetriNetUnfolderBase]: 2468/5314 cut-off events. [2024-11-17 03:31:26,189 INFO L125 PetriNetUnfolderBase]: For 20849/21173 co-relation queries the response was YES. [2024-11-17 03:31:26,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20673 conditions, 5314 events. 2468/5314 cut-off events. For 20849/21173 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 39754 event pairs, 782 based on Foata normal form. 42/5280 useless extension candidates. Maximal degree in co-relation 18406. Up to 3413 conditions per place. [2024-11-17 03:31:26,213 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 120 selfloop transitions, 106 changer transitions 7/258 dead transitions. [2024-11-17 03:31:26,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 258 transitions, 3968 flow [2024-11-17 03:31:26,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 320 transitions. [2024-11-17 03:31:26,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130268199233716 [2024-11-17 03:31:26,215 INFO L175 Difference]: Start difference. First operand has 175 places, 190 transitions, 2592 flow. Second operand 9 states and 320 transitions. [2024-11-17 03:31:26,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 258 transitions, 3968 flow [2024-11-17 03:31:26,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 258 transitions, 3714 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:26,269 INFO L231 Difference]: Finished difference. Result has 181 places, 222 transitions, 3345 flow [2024-11-17 03:31:26,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3345, PETRI_PLACES=181, PETRI_TRANSITIONS=222} [2024-11-17 03:31:26,270 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 129 predicate places. [2024-11-17 03:31:26,270 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 222 transitions, 3345 flow [2024-11-17 03:31:26,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:26,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:26,270 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:26,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-17 03:31:26,271 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:26,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1500882929, now seen corresponding path program 5 times [2024-11-17 03:31:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:26,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416555057] [2024-11-17 03:31:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:26,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:26,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:26,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:26,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416555057] [2024-11-17 03:31:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416555057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:26,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:26,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345936980] [2024-11-17 03:31:26,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:26,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:26,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:26,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 222 transitions, 3345 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:26,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:26,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:26,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:27,616 INFO L124 PetriNetUnfolderBase]: 2612/5530 cut-off events. [2024-11-17 03:31:27,616 INFO L125 PetriNetUnfolderBase]: For 25729/25729 co-relation queries the response was YES. [2024-11-17 03:31:27,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23289 conditions, 5530 events. 2612/5530 cut-off events. For 25729/25729 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 41088 event pairs, 858 based on Foata normal form. 24/5468 useless extension candidates. Maximal degree in co-relation 21144. Up to 3485 conditions per place. [2024-11-17 03:31:27,643 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 106 selfloop transitions, 146 changer transitions 9/286 dead transitions. [2024-11-17 03:31:27,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 286 transitions, 4838 flow [2024-11-17 03:31:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 319 transitions. [2024-11-17 03:31:27,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-17 03:31:27,644 INFO L175 Difference]: Start difference. First operand has 181 places, 222 transitions, 3345 flow. Second operand 9 states and 319 transitions. [2024-11-17 03:31:27,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 286 transitions, 4838 flow [2024-11-17 03:31:27,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 286 transitions, 4579 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:27,719 INFO L231 Difference]: Finished difference. Result has 187 places, 258 transitions, 4339 flow [2024-11-17 03:31:27,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4339, PETRI_PLACES=187, PETRI_TRANSITIONS=258} [2024-11-17 03:31:27,720 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 135 predicate places. [2024-11-17 03:31:27,720 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 258 transitions, 4339 flow [2024-11-17 03:31:27,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:27,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:27,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:27,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-17 03:31:27,721 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:27,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1812581081, now seen corresponding path program 6 times [2024-11-17 03:31:27,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:27,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390267477] [2024-11-17 03:31:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:27,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:28,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:28,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390267477] [2024-11-17 03:31:28,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390267477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:28,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:28,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:28,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51356741] [2024-11-17 03:31:28,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:28,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:28,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:28,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:28,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 258 transitions, 4339 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:28,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:28,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:28,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:29,297 INFO L124 PetriNetUnfolderBase]: 2606/5526 cut-off events. [2024-11-17 03:31:29,297 INFO L125 PetriNetUnfolderBase]: For 30120/30696 co-relation queries the response was YES. [2024-11-17 03:31:29,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24301 conditions, 5526 events. 2606/5526 cut-off events. For 30120/30696 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 41091 event pairs, 858 based on Foata normal form. 48/5508 useless extension candidates. Maximal degree in co-relation 21916. Up to 3509 conditions per place. [2024-11-17 03:31:29,322 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 115 selfloop transitions, 159 changer transitions 7/306 dead transitions. [2024-11-17 03:31:29,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 306 transitions, 5537 flow [2024-11-17 03:31:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 318 transitions. [2024-11-17 03:31:29,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-11-17 03:31:29,323 INFO L175 Difference]: Start difference. First operand has 187 places, 258 transitions, 4339 flow. Second operand 9 states and 318 transitions. [2024-11-17 03:31:29,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 306 transitions, 5537 flow [2024-11-17 03:31:29,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 306 transitions, 5340 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-17 03:31:29,493 INFO L231 Difference]: Finished difference. Result has 194 places, 283 transitions, 5124 flow [2024-11-17 03:31:29,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=4177, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5124, PETRI_PLACES=194, PETRI_TRANSITIONS=283} [2024-11-17 03:31:29,494 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-11-17 03:31:29,494 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 283 transitions, 5124 flow [2024-11-17 03:31:29,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:29,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:29,495 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:29,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-17 03:31:29,495 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:29,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:29,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1195755099, now seen corresponding path program 7 times [2024-11-17 03:31:29,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:29,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668992337] [2024-11-17 03:31:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:29,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:29,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:29,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668992337] [2024-11-17 03:31:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668992337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:29,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700092030] [2024-11-17 03:31:29,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-17 03:31:29,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:29,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:29,872 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:29,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-17 03:31:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:29,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-17 03:31:29,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:30,189 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-17 03:31:30,189 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 26 treesize of output 10 [2024-11-17 03:31:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:30,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:30,379 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-17 03:31:30,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-17 03:31:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700092030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:30,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-17 03:31:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134310406] [2024-11-17 03:31:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:30,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:31:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:31:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:31:30,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:30,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 283 transitions, 5124 flow. Second operand has 21 states, 21 states have (on average 30.80952380952381) internal successors, (647), 21 states have internal predecessors, (647), 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 03:31:30,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:30,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:30,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:31,939 INFO L124 PetriNetUnfolderBase]: 2838/6066 cut-off events. [2024-11-17 03:31:31,939 INFO L125 PetriNetUnfolderBase]: For 34841/34841 co-relation queries the response was YES. [2024-11-17 03:31:31,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26855 conditions, 6066 events. 2838/6066 cut-off events. For 34841/34841 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 45904 event pairs, 563 based on Foata normal form. 67/6081 useless extension candidates. Maximal degree in co-relation 24237. Up to 3080 conditions per place. [2024-11-17 03:31:32,090 INFO L140 encePairwiseOnDemand]: 47/58 looper letters, 143 selfloop transitions, 203 changer transitions 3/374 dead transitions. [2024-11-17 03:31:32,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 374 transitions, 6526 flow [2024-11-17 03:31:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-17 03:31:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-17 03:31:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 504 transitions. [2024-11-17 03:31:32,091 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-11-17 03:31:32,091 INFO L175 Difference]: Start difference. First operand has 194 places, 283 transitions, 5124 flow. Second operand 14 states and 504 transitions. [2024-11-17 03:31:32,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 374 transitions, 6526 flow [2024-11-17 03:31:32,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 374 transitions, 6277 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-11-17 03:31:32,195 INFO L231 Difference]: Finished difference. Result has 208 places, 313 transitions, 5796 flow [2024-11-17 03:31:32,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5796, PETRI_PLACES=208, PETRI_TRANSITIONS=313} [2024-11-17 03:31:32,196 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 156 predicate places. [2024-11-17 03:31:32,196 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 313 transitions, 5796 flow [2024-11-17 03:31:32,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.80952380952381) internal successors, (647), 21 states have internal predecessors, (647), 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 03:31:32,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:32,197 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:32,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:32,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:32,402 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:32,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:32,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1148143297, now seen corresponding path program 8 times [2024-11-17 03:31:32,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:32,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734990276] [2024-11-17 03:31:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:32,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:32,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:32,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734990276] [2024-11-17 03:31:32,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734990276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:32,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:32,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:32,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945377731] [2024-11-17 03:31:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:32,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:32,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:32,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 313 transitions, 5796 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:32,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:32,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:32,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:34,042 INFO L124 PetriNetUnfolderBase]: 2880/6127 cut-off events. [2024-11-17 03:31:34,042 INFO L125 PetriNetUnfolderBase]: For 46860/46872 co-relation queries the response was YES. [2024-11-17 03:31:34,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29098 conditions, 6127 events. 2880/6127 cut-off events. For 46860/46872 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 46144 event pairs, 761 based on Foata normal form. 24/6063 useless extension candidates. Maximal degree in co-relation 27298. Up to 4056 conditions per place. [2024-11-17 03:31:34,075 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 138 selfloop transitions, 181 changer transitions 5/349 dead transitions. [2024-11-17 03:31:34,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 349 transitions, 6930 flow [2024-11-17 03:31:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 317 transitions. [2024-11-17 03:31:34,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60727969348659 [2024-11-17 03:31:34,077 INFO L175 Difference]: Start difference. First operand has 208 places, 313 transitions, 5796 flow. Second operand 9 states and 317 transitions. [2024-11-17 03:31:34,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 349 transitions, 6930 flow [2024-11-17 03:31:34,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 349 transitions, 6751 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:34,237 INFO L231 Difference]: Finished difference. Result has 212 places, 328 transitions, 6401 flow [2024-11-17 03:31:34,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=5624, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6401, PETRI_PLACES=212, PETRI_TRANSITIONS=328} [2024-11-17 03:31:34,237 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 160 predicate places. [2024-11-17 03:31:34,237 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 328 transitions, 6401 flow [2024-11-17 03:31:34,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:34,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:34,238 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:34,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-17 03:31:34,238 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:34,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:34,238 INFO L85 PathProgramCache]: Analyzing trace with hash 485659803, now seen corresponding path program 9 times [2024-11-17 03:31:34,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:34,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143278478] [2024-11-17 03:31:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:34,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143278478] [2024-11-17 03:31:34,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143278478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818642733] [2024-11-17 03:31:34,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:31:34,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:34,616 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:34,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-17 03:31:34,695 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:31:34,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:34,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-17 03:31:34,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:34,751 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 03:31:34,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:34,885 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 29 treesize of output 21 [2024-11-17 03:31:34,910 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 03:31:34,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:35,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:35,095 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 158 treesize of output 154 [2024-11-17 03:31:35,144 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-17 03:31:35,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-17 03:31:35,211 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-17 03:31:35,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 178 [2024-11-17 03:31:35,412 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 03:31:35,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818642733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:35,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:35,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 21 [2024-11-17 03:31:35,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126120816] [2024-11-17 03:31:35,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:35,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:31:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:31:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:31:36,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:36,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 328 transitions, 6401 flow. Second operand has 22 states, 22 states have (on average 30.181818181818183) internal successors, (664), 22 states have internal predecessors, (664), 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 03:31:36,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:36,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:36,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:37,238 INFO L124 PetriNetUnfolderBase]: 2801/6019 cut-off events. [2024-11-17 03:31:37,239 INFO L125 PetriNetUnfolderBase]: For 44165/44177 co-relation queries the response was YES. [2024-11-17 03:31:37,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 6019 events. 2801/6019 cut-off events. For 44165/44177 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 45671 event pairs, 590 based on Foata normal form. 79/6048 useless extension candidates. Maximal degree in co-relation 26917. Up to 3202 conditions per place. [2024-11-17 03:31:37,279 INFO L140 encePairwiseOnDemand]: 45/58 looper letters, 129 selfloop transitions, 223 changer transitions 3/380 dead transitions. [2024-11-17 03:31:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 380 transitions, 7393 flow [2024-11-17 03:31:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-17 03:31:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-17 03:31:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 524 transitions. [2024-11-17 03:31:37,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6022988505747127 [2024-11-17 03:31:37,281 INFO L175 Difference]: Start difference. First operand has 212 places, 328 transitions, 6401 flow. Second operand 15 states and 524 transitions. [2024-11-17 03:31:37,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 380 transitions, 7393 flow [2024-11-17 03:31:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 380 transitions, 7021 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:37,457 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 6510 flow [2024-11-17 03:31:37,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=6024, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6510, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-11-17 03:31:37,458 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 168 predicate places. [2024-11-17 03:31:37,458 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 6510 flow [2024-11-17 03:31:37,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 30.181818181818183) internal successors, (664), 22 states have internal predecessors, (664), 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 03:31:37,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:37,459 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:37,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:37,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:37,660 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:37,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1756540465, now seen corresponding path program 10 times [2024-11-17 03:31:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:37,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376686186] [2024-11-17 03:31:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:37,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:38,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:38,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376686186] [2024-11-17 03:31:38,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376686186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:38,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:38,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:38,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774987168] [2024-11-17 03:31:38,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:38,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:38,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:38,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:38,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 6510 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:38,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:38,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:38,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:39,300 INFO L124 PetriNetUnfolderBase]: 2777/5976 cut-off events. [2024-11-17 03:31:39,300 INFO L125 PetriNetUnfolderBase]: For 45401/45409 co-relation queries the response was YES. [2024-11-17 03:31:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28719 conditions, 5976 events. 2777/5976 cut-off events. For 45401/45409 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 45478 event pairs, 753 based on Foata normal form. 24/5908 useless extension candidates. Maximal degree in co-relation 26747. Up to 3965 conditions per place. [2024-11-17 03:31:39,351 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 141 selfloop transitions, 174 changer transitions 6/346 dead transitions. [2024-11-17 03:31:39,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 346 transitions, 7108 flow [2024-11-17 03:31:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 318 transitions. [2024-11-17 03:31:39,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-11-17 03:31:39,352 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 6510 flow. Second operand 9 states and 318 transitions. [2024-11-17 03:31:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 346 transitions, 7108 flow [2024-11-17 03:31:39,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 346 transitions, 6621 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-17 03:31:39,557 INFO L231 Difference]: Finished difference. Result has 220 places, 326 transitions, 6298 flow [2024-11-17 03:31:39,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=5838, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6298, PETRI_PLACES=220, PETRI_TRANSITIONS=326} [2024-11-17 03:31:39,558 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 168 predicate places. [2024-11-17 03:31:39,558 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 326 transitions, 6298 flow [2024-11-17 03:31:39,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:39,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:39,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:39,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-17 03:31:39,559 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:39,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1406789541, now seen corresponding path program 11 times [2024-11-17 03:31:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678336931] [2024-11-17 03:31:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678336931] [2024-11-17 03:31:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678336931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324403973] [2024-11-17 03:31:39,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-17 03:31:39,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:39,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:39,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:39,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-17 03:31:40,029 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:31:40,029 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:40,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-17 03:31:40,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:40,204 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-17 03:31:40,205 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 29 treesize of output 25 [2024-11-17 03:31:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:40,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:40,366 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-17 03:31:40,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-17 03:31:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324403973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:40,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:40,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-11-17 03:31:40,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528074832] [2024-11-17 03:31:40,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:40,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:31:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:31:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:31:40,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:40,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 326 transitions, 6298 flow. Second operand has 22 states, 22 states have (on average 30.59090909090909) internal successors, (673), 22 states have internal predecessors, (673), 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 03:31:40,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:40,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:40,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:42,078 INFO L124 PetriNetUnfolderBase]: 2838/6138 cut-off events. [2024-11-17 03:31:42,078 INFO L125 PetriNetUnfolderBase]: For 46437/46445 co-relation queries the response was YES. [2024-11-17 03:31:42,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29305 conditions, 6138 events. 2838/6138 cut-off events. For 46437/46445 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 46951 event pairs, 745 based on Foata normal form. 67/6107 useless extension candidates. Maximal degree in co-relation 27408. Up to 4020 conditions per place. [2024-11-17 03:31:42,135 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 152 selfloop transitions, 185 changer transitions 2/364 dead transitions. [2024-11-17 03:31:42,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 364 transitions, 7274 flow [2024-11-17 03:31:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:31:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:31:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 355 transitions. [2024-11-17 03:31:42,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6120689655172413 [2024-11-17 03:31:42,137 INFO L175 Difference]: Start difference. First operand has 220 places, 326 transitions, 6298 flow. Second operand 10 states and 355 transitions. [2024-11-17 03:31:42,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 364 transitions, 7274 flow [2024-11-17 03:31:42,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 364 transitions, 6968 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:42,343 INFO L231 Difference]: Finished difference. Result has 223 places, 335 transitions, 6553 flow [2024-11-17 03:31:42,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6553, PETRI_PLACES=223, PETRI_TRANSITIONS=335} [2024-11-17 03:31:42,343 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 171 predicate places. [2024-11-17 03:31:42,344 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 335 transitions, 6553 flow [2024-11-17 03:31:42,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 30.59090909090909) internal successors, (673), 22 states have internal predecessors, (673), 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 03:31:42,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:42,344 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:42,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-17 03:31:42,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-17 03:31:42,545 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:42,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:42,545 INFO L85 PathProgramCache]: Analyzing trace with hash -474277007, now seen corresponding path program 12 times [2024-11-17 03:31:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290788746] [2024-11-17 03:31:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:42,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290788746] [2024-11-17 03:31:42,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290788746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:31:42,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149048870] [2024-11-17 03:31:42,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-17 03:31:42,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:31:42,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:31:42,924 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:31:42,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-17 03:31:43,008 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-17 03:31:43,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:31:43,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-17 03:31:43,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:31:43,270 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 03:31:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:43,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:31:43,449 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-17 03:31:43,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-17 03:31:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149048870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:31:43,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:31:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-17 03:31:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44594449] [2024-11-17 03:31:43,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:31:43,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-17 03:31:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-17 03:31:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-17 03:31:43,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:43,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 335 transitions, 6553 flow. Second operand has 17 states, 17 states have (on average 30.58823529411765) internal successors, (520), 17 states have internal predecessors, (520), 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 03:31:43,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:43,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:43,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:45,103 INFO L124 PetriNetUnfolderBase]: 3160/6726 cut-off events. [2024-11-17 03:31:45,103 INFO L125 PetriNetUnfolderBase]: For 57305/57321 co-relation queries the response was YES. [2024-11-17 03:31:45,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33342 conditions, 6726 events. 3160/6726 cut-off events. For 57305/57321 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 51837 event pairs, 709 based on Foata normal form. 67/6701 useless extension candidates. Maximal degree in co-relation 31406. Up to 4197 conditions per place. [2024-11-17 03:31:45,164 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 165 selfloop transitions, 199 changer transitions 2/391 dead transitions. [2024-11-17 03:31:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 391 transitions, 7887 flow [2024-11-17 03:31:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:45,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 328 transitions. [2024-11-17 03:31:45,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6283524904214559 [2024-11-17 03:31:45,166 INFO L175 Difference]: Start difference. First operand has 223 places, 335 transitions, 6553 flow. Second operand 9 states and 328 transitions. [2024-11-17 03:31:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 391 transitions, 7887 flow [2024-11-17 03:31:45,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 391 transitions, 7553 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-17 03:31:45,435 INFO L231 Difference]: Finished difference. Result has 227 places, 354 transitions, 7055 flow [2024-11-17 03:31:45,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7055, PETRI_PLACES=227, PETRI_TRANSITIONS=354} [2024-11-17 03:31:45,435 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 175 predicate places. [2024-11-17 03:31:45,436 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 354 transitions, 7055 flow [2024-11-17 03:31:45,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 30.58823529411765) internal successors, (520), 17 states have internal predecessors, (520), 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 03:31:45,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:45,436 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:45,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-17 03:31:45,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-17 03:31:45,637 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:45,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1311307615, now seen corresponding path program 13 times [2024-11-17 03:31:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:45,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579885298] [2024-11-17 03:31:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:31:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:31:45,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:31:45,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579885298] [2024-11-17 03:31:45,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579885298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:31:45,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:31:45,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-17 03:31:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328005689] [2024-11-17 03:31:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:31:45,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-17 03:31:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:31:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-17 03:31:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:31:46,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 58 [2024-11-17 03:31:46,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 354 transitions, 7055 flow. Second operand has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:46,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:31:46,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 58 [2024-11-17 03:31:46,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:31:47,283 INFO L124 PetriNetUnfolderBase]: 3093/6628 cut-off events. [2024-11-17 03:31:47,283 INFO L125 PetriNetUnfolderBase]: For 63045/63061 co-relation queries the response was YES. [2024-11-17 03:31:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33494 conditions, 6628 events. 3093/6628 cut-off events. For 63045/63061 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 51387 event pairs, 780 based on Foata normal form. 67/6595 useless extension candidates. Maximal degree in co-relation 31556. Up to 4476 conditions per place. [2024-11-17 03:31:47,346 INFO L140 encePairwiseOnDemand]: 48/58 looper letters, 171 selfloop transitions, 182 changer transitions 2/380 dead transitions. [2024-11-17 03:31:47,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 380 transitions, 7892 flow [2024-11-17 03:31:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-17 03:31:47,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-17 03:31:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 322 transitions. [2024-11-17 03:31:47,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2024-11-17 03:31:47,348 INFO L175 Difference]: Start difference. First operand has 227 places, 354 transitions, 7055 flow. Second operand 9 states and 322 transitions. [2024-11-17 03:31:47,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 380 transitions, 7892 flow [2024-11-17 03:31:47,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 380 transitions, 7627 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-11-17 03:31:47,637 INFO L231 Difference]: Finished difference. Result has 230 places, 353 transitions, 7133 flow [2024-11-17 03:31:47,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7133, PETRI_PLACES=230, PETRI_TRANSITIONS=353} [2024-11-17 03:31:47,639 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-11-17 03:31:47,639 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 353 transitions, 7133 flow [2024-11-17 03:31:47,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.2) internal successors, (302), 10 states have internal predecessors, (302), 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 03:31:47,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:31:47,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:31:47,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-17 03:31:47,640 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-17 03:31:47,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:31:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1479046955, now seen corresponding path program 14 times [2024-11-17 03:31:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:31:47,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322608464] [2024-11-17 03:31:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:31:47,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:31:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat