./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:41:06,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:41:06,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:41:06,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:41:06,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:41:06,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:41:06,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:41:06,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:41:06,823 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:41:06,823 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:41:06,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:41:06,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:41:06,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:41:06,824 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:41:06,824 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:41:06,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:06,825 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:41:06,825 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2025-02-08 08:41:07,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:41:07,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:41:07,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:41:07,019 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:41:07,019 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:41:07,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-02-08 08:41:08,279 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44ae06650/334fd9915d724e44a665d563489ce013/FLAGe9119dce8 [2025-02-08 08:41:08,513 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:41:08,513 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2025-02-08 08:41:08,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44ae06650/334fd9915d724e44a665d563489ce013/FLAGe9119dce8 [2025-02-08 08:41:08,533 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/44ae06650/334fd9915d724e44a665d563489ce013 [2025-02-08 08:41:08,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:41:08,536 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:41:08,536 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:08,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:41:08,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:41:08,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c928ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08, skipping insertion in model container [2025-02-08 08:41:08,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,555 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:41:08,696 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:41:08,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:08,709 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:41:08,731 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:41:08,745 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:41:08,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08 WrapperNode [2025-02-08 08:41:08,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:41:08,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:08,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:41:08,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:41:08,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,777 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2025-02-08 08:41:08,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:41:08,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:41:08,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:41:08,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:41:08,787 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,791 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,815 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:41:08,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,819 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,825 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,827 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:41:08,827 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:41:08,827 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:41:08,827 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:41:08,828 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (1/1) ... [2025-02-08 08:41:08,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:41:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:08,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:41:08,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:41:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:41:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:41:08,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:41:08,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:41:08,882 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:41:08,944 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:41:08,945 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:41:09,129 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:41:09,129 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:41:09,320 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:41:09,320 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:41:09,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:09 BoogieIcfgContainer [2025-02-08 08:41:09,321 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:41:09,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:41:09,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:41:09,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:41:09,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:41:08" (1/3) ... [2025-02-08 08:41:09,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bfc2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:09, skipping insertion in model container [2025-02-08 08:41:09,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:41:08" (2/3) ... [2025-02-08 08:41:09,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bfc2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:41:09, skipping insertion in model container [2025-02-08 08:41:09,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:41:09" (3/3) ... [2025-02-08 08:41:09,330 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2025-02-08 08:41:09,341 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:41:09,343 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 37 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-02-08 08:41:09,343 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:41:09,391 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-02-08 08:41:09,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2025-02-08 08:41:09,438 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2025-02-08 08:41:09,440 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:41:09,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 83 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2025-02-08 08:41:09,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2025-02-08 08:41:09,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2025-02-08 08:41:09,458 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:41:09,468 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;@57f731e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:41:09,469 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2025-02-08 08:41:09,472 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:41:09,472 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:41:09,473 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:41:09,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:09,474 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:09,474 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:09,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash 434108, now seen corresponding path program 1 times [2025-02-08 08:41:09,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787217480] [2025-02-08 08:41:09,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:09,553 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:09,575 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:09,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:09,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:09,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787217480] [2025-02-08 08:41:09,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787217480] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:09,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:09,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:41:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13058202] [2025-02-08 08:41:09,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:09,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:09,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:09,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:09,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:09,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:09,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:09,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:09,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:09,933 INFO L124 PetriNetUnfolderBase]: 238/446 cut-off events. [2025-02-08 08:41:09,933 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-02-08 08:41:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 446 events. 238/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2046 event pairs, 201 based on Foata normal form. 22/334 useless extension candidates. Maximal degree in co-relation 814. Up to 388 conditions per place. [2025-02-08 08:41:09,941 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 25 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2025-02-08 08:41:09,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 132 flow [2025-02-08 08:41:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2025-02-08 08:41:09,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-02-08 08:41:09,956 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 57 transitions. [2025-02-08 08:41:09,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 132 flow [2025-02-08 08:41:09,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:09,962 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 74 flow [2025-02-08 08:41:09,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2025-02-08 08:41:09,966 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2025-02-08 08:41:09,966 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 74 flow [2025-02-08 08:41:09,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:09,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:09,967 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:41:09,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:41:09,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:09,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 434109, now seen corresponding path program 1 times [2025-02-08 08:41:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217355678] [2025-02-08 08:41:09,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:09,980 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:41:09,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:41:09,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:09,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:10,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:10,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217355678] [2025-02-08 08:41:10,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217355678] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:10,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:10,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:10,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169422939] [2025-02-08 08:41:10,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:10,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:10,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:10,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:10,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:10,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:10,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:10,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:10,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:10,284 INFO L124 PetriNetUnfolderBase]: 239/449 cut-off events. [2025-02-08 08:41:10,284 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:41:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 449 events. 239/449 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2048 event pairs, 201 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 838. Up to 393 conditions per place. [2025-02-08 08:41:10,287 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2025-02-08 08:41:10,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 144 flow [2025-02-08 08:41:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2025-02-08 08:41:10,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425 [2025-02-08 08:41:10,289 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 74 flow. Second operand 4 states and 68 transitions. [2025-02-08 08:41:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 144 flow [2025-02-08 08:41:10,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 138 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:10,290 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 97 flow [2025-02-08 08:41:10,290 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2025-02-08 08:41:10,291 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2025-02-08 08:41:10,291 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 97 flow [2025-02-08 08:41:10,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:10,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:10,291 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:41:10,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:41:10,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:10,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash 417192901, now seen corresponding path program 1 times [2025-02-08 08:41:10,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:10,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104332397] [2025-02-08 08:41:10,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:10,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:10,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:10,306 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:10,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:10,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104332397] [2025-02-08 08:41:10,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104332397] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421985101] [2025-02-08 08:41:10,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:10,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:10,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:10,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:10,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:41:10,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:41:10,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:41:10,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:10,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:10,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:41:10,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:10,684 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 [2025-02-08 08:41:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:10,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:10,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421985101] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:10,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:10,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:41:10,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191150617] [2025-02-08 08:41:10,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:10,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:41:10,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:10,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:41:10,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:41:11,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:11,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:11,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:11,325 INFO L124 PetriNetUnfolderBase]: 239/448 cut-off events. [2025-02-08 08:41:11,326 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:41:11,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 448 events. 239/448 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2033 event pairs, 201 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 845. Up to 389 conditions per place. [2025-02-08 08:41:11,333 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2025-02-08 08:41:11,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 153 flow [2025-02-08 08:41:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 85 transitions. [2025-02-08 08:41:11,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2025-02-08 08:41:11,334 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 97 flow. Second operand 6 states and 85 transitions. [2025-02-08 08:41:11,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 153 flow [2025-02-08 08:41:11,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:11,336 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 104 flow [2025-02-08 08:41:11,336 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2025-02-08 08:41:11,337 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2025-02-08 08:41:11,337 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 104 flow [2025-02-08 08:41:11,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,337 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:11,337 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:41:11,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:41:11,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:11,538 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:11,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:11,538 INFO L85 PathProgramCache]: Analyzing trace with hash 49726707, now seen corresponding path program 1 times [2025-02-08 08:41:11,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:11,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221367771] [2025-02-08 08:41:11,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:11,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:41:11,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:41:11,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:11,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:11,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:11,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221367771] [2025-02-08 08:41:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221367771] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:11,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:11,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:11,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729121369] [2025-02-08 08:41:11,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:11,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:11,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:11,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:11,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:11,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:11,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:11,711 INFO L124 PetriNetUnfolderBase]: 168/322 cut-off events. [2025-02-08 08:41:11,711 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:41:11,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 322 events. 168/322 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1264 event pairs, 136 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 602. Up to 272 conditions per place. [2025-02-08 08:41:11,713 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2025-02-08 08:41:11,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 152 flow [2025-02-08 08:41:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2025-02-08 08:41:11,716 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39375 [2025-02-08 08:41:11,716 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 104 flow. Second operand 4 states and 63 transitions. [2025-02-08 08:41:11,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 152 flow [2025-02-08 08:41:11,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 122 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:11,717 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 74 flow [2025-02-08 08:41:11,717 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-02-08 08:41:11,718 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2025-02-08 08:41:11,718 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 74 flow [2025-02-08 08:41:11,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,718 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:11,718 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:41:11,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:41:11,718 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:11,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:11,719 INFO L85 PathProgramCache]: Analyzing trace with hash 49726708, now seen corresponding path program 1 times [2025-02-08 08:41:11,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:11,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098952233] [2025-02-08 08:41:11,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:11,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:41:11,725 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:41:11,725 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:11,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:11,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098952233] [2025-02-08 08:41:11,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098952233] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:11,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:11,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782639381] [2025-02-08 08:41:11,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:11,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:11,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:11,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:11,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:11,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-02-08 08:41:11,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-02-08 08:41:11,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:11,858 INFO L124 PetriNetUnfolderBase]: 180/361 cut-off events. [2025-02-08 08:41:11,859 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-08 08:41:11,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 361 events. 180/361 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1467 event pairs, 149 based on Foata normal form. 17/317 useless extension candidates. Maximal degree in co-relation 594. Up to 275 conditions per place. [2025-02-08 08:41:11,860 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 24 selfloop transitions, 2 changer transitions 8/39 dead transitions. [2025-02-08 08:41:11,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 158 flow [2025-02-08 08:41:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2025-02-08 08:41:11,861 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-02-08 08:41:11,861 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 74 flow. Second operand 4 states and 80 transitions. [2025-02-08 08:41:11,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 158 flow [2025-02-08 08:41:11,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:11,862 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 83 flow [2025-02-08 08:41:11,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-02-08 08:41:11,863 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2025-02-08 08:41:11,863 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 83 flow [2025-02-08 08:41:11,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:11,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:11,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:41:11,863 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:11,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1039553556, now seen corresponding path program 1 times [2025-02-08 08:41:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971331625] [2025-02-08 08:41:11,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:11,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:41:11,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:41:11,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:11,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971331625] [2025-02-08 08:41:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971331625] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:11,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:11,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 08:41:11,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531015064] [2025-02-08 08:41:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:11,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:11,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:11,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:11,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:41:11,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-02-08 08:41:11,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:11,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:11,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-02-08 08:41:11,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:12,051 INFO L124 PetriNetUnfolderBase]: 108/215 cut-off events. [2025-02-08 08:41:12,051 INFO L125 PetriNetUnfolderBase]: For 32/36 co-relation queries the response was YES. [2025-02-08 08:41:12,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 215 events. 108/215 cut-off events. For 32/36 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 83 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 434. Up to 175 conditions per place. [2025-02-08 08:41:12,052 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2025-02-08 08:41:12,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 117 flow [2025-02-08 08:41:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2025-02-08 08:41:12,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-02-08 08:41:12,054 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 83 flow. Second operand 4 states and 64 transitions. [2025-02-08 08:41:12,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 117 flow [2025-02-08 08:41:12,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:12,055 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 71 flow [2025-02-08 08:41:12,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2025-02-08 08:41:12,055 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -7 predicate places. [2025-02-08 08:41:12,055 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 71 flow [2025-02-08 08:41:12,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:12,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:12,056 INFO L206 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] [2025-02-08 08:41:12,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-08 08:41:12,056 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:12,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1938266186, now seen corresponding path program 1 times [2025-02-08 08:41:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:12,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386838087] [2025-02-08 08:41:12,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:12,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:12,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:41:12,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:12,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:12,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:12,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:12,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386838087] [2025-02-08 08:41:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386838087] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:12,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:12,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:41:12,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728982308] [2025-02-08 08:41:12,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:12,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:41:12,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:12,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:41:12,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:41:12,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-02-08 08:41:12,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:12,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:12,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-02-08 08:41:12,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:12,176 INFO L124 PetriNetUnfolderBase]: 116/232 cut-off events. [2025-02-08 08:41:12,176 INFO L125 PetriNetUnfolderBase]: For 41/45 co-relation queries the response was YES. [2025-02-08 08:41:12,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 232 events. 116/232 cut-off events. For 41/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 745 event pairs, 34 based on Foata normal form. 6/226 useless extension candidates. Maximal degree in co-relation 471. Up to 159 conditions per place. [2025-02-08 08:41:12,177 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 27 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2025-02-08 08:41:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 150 flow [2025-02-08 08:41:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:41:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:41:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2025-02-08 08:41:12,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2025-02-08 08:41:12,178 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 71 flow. Second operand 3 states and 59 transitions. [2025-02-08 08:41:12,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 150 flow [2025-02-08 08:41:12,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:12,179 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 91 flow [2025-02-08 08:41:12,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-02-08 08:41:12,180 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2025-02-08 08:41:12,180 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 91 flow [2025-02-08 08:41:12,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:12,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:12,180 INFO L206 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] [2025-02-08 08:41:12,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-08 08:41:12,180 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:12,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -451225526, now seen corresponding path program 2 times [2025-02-08 08:41:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780633677] [2025-02-08 08:41:12,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:12,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:41:12,210 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:12,210 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:12,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780633677] [2025-02-08 08:41:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780633677] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:12,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:12,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:12,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332749921] [2025-02-08 08:41:12,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:12,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:12,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:12,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:12,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:12,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 91 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:12,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:12,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:12,801 INFO L124 PetriNetUnfolderBase]: 199/374 cut-off events. [2025-02-08 08:41:12,802 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-02-08 08:41:12,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 374 events. 199/374 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1405 event pairs, 16 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 871. Up to 231 conditions per place. [2025-02-08 08:41:12,805 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 48 selfloop transitions, 14 changer transitions 5/70 dead transitions. [2025-02-08 08:41:12,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 338 flow [2025-02-08 08:41:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 146 transitions. [2025-02-08 08:41:12,806 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2025-02-08 08:41:12,806 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 91 flow. Second operand 10 states and 146 transitions. [2025-02-08 08:41:12,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 338 flow [2025-02-08 08:41:12,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 312 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:12,808 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 156 flow [2025-02-08 08:41:12,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2025-02-08 08:41:12,808 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2025-02-08 08:41:12,808 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 156 flow [2025-02-08 08:41:12,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:12,808 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:12,810 INFO L206 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] [2025-02-08 08:41:12,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-08 08:41:12,810 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:12,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:12,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2143606242, now seen corresponding path program 3 times [2025-02-08 08:41:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320605724] [2025-02-08 08:41:12,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:12,821 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:41:12,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-02-08 08:41:12,844 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:12,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:13,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320605724] [2025-02-08 08:41:13,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320605724] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:13,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99358733] [2025-02-08 08:41:13,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:13,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:13,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:13,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:13,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 156 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:13,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:13,425 INFO L124 PetriNetUnfolderBase]: 224/439 cut-off events. [2025-02-08 08:41:13,425 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2025-02-08 08:41:13,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1188 conditions, 439 events. 224/439 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1798 event pairs, 34 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 1176. Up to 263 conditions per place. [2025-02-08 08:41:13,429 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 53 selfloop transitions, 21 changer transitions 5/82 dead transitions. [2025-02-08 08:41:13,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 82 transitions, 467 flow [2025-02-08 08:41:13,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2025-02-08 08:41:13,430 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3775 [2025-02-08 08:41:13,430 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 156 flow. Second operand 10 states and 151 transitions. [2025-02-08 08:41:13,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 82 transitions, 467 flow [2025-02-08 08:41:13,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 82 transitions, 460 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:13,436 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 284 flow [2025-02-08 08:41:13,436 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2025-02-08 08:41:13,436 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2025-02-08 08:41:13,436 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 284 flow [2025-02-08 08:41:13,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,436 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:13,436 INFO L206 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] [2025-02-08 08:41:13,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-08 08:41:13,437 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:13,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,437 INFO L85 PathProgramCache]: Analyzing trace with hash -333922610, now seen corresponding path program 4 times [2025-02-08 08:41:13,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338247856] [2025-02-08 08:41:13,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:13,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,445 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:41:13,459 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:13,459 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:13,459 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:13,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338247856] [2025-02-08 08:41:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338247856] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:13,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:13,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:13,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981723735] [2025-02-08 08:41:13,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:13,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:13,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:13,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:13,898 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:13,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:13,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:13,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:13,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:14,227 INFO L124 PetriNetUnfolderBase]: 241/504 cut-off events. [2025-02-08 08:41:14,228 INFO L125 PetriNetUnfolderBase]: For 538/538 co-relation queries the response was YES. [2025-02-08 08:41:14,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 504 events. 241/504 cut-off events. For 538/538 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2334 event pairs, 23 based on Foata normal form. 1/505 useless extension candidates. Maximal degree in co-relation 1552. Up to 237 conditions per place. [2025-02-08 08:41:14,231 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 57 selfloop transitions, 29 changer transitions 4/93 dead transitions. [2025-02-08 08:41:14,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 93 transitions, 625 flow [2025-02-08 08:41:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:14,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2025-02-08 08:41:14,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.385 [2025-02-08 08:41:14,234 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 284 flow. Second operand 10 states and 154 transitions. [2025-02-08 08:41:14,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 93 transitions, 625 flow [2025-02-08 08:41:14,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 615 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-02-08 08:41:14,239 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 389 flow [2025-02-08 08:41:14,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=389, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2025-02-08 08:41:14,239 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 26 predicate places. [2025-02-08 08:41:14,241 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 389 flow [2025-02-08 08:41:14,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:14,241 INFO L206 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] [2025-02-08 08:41:14,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-08 08:41:14,241 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:14,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 182350744, now seen corresponding path program 5 times [2025-02-08 08:41:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028167524] [2025-02-08 08:41:14,242 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:14,248 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:41:14,257 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:14,258 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:14,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028167524] [2025-02-08 08:41:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028167524] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:14,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285954382] [2025-02-08 08:41:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:14,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:14,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:14,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:14,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:14,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 389 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:14,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:14,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:14,966 INFO L124 PetriNetUnfolderBase]: 210/453 cut-off events. [2025-02-08 08:41:14,967 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2025-02-08 08:41:14,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 453 events. 210/453 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2095 event pairs, 35 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 1569. Up to 278 conditions per place. [2025-02-08 08:41:14,969 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 54 selfloop transitions, 22 changer transitions 5/85 dead transitions. [2025-02-08 08:41:14,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 683 flow [2025-02-08 08:41:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2025-02-08 08:41:14,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3825 [2025-02-08 08:41:14,972 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 389 flow. Second operand 10 states and 153 transitions. [2025-02-08 08:41:14,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 683 flow [2025-02-08 08:41:14,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 628 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:14,975 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 436 flow [2025-02-08 08:41:14,975 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2025-02-08 08:41:14,979 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 33 predicate places. [2025-02-08 08:41:14,979 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 436 flow [2025-02-08 08:41:14,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:14,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:14,979 INFO L206 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] [2025-02-08 08:41:14,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-08 08:41:14,980 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:14,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash 93469548, now seen corresponding path program 6 times [2025-02-08 08:41:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:14,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120005112] [2025-02-08 08:41:14,980 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:41:14,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:14,986 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:41:15,004 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:15,004 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:41:15,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:15,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120005112] [2025-02-08 08:41:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120005112] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197390447] [2025-02-08 08:41:15,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:15,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:15,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:15,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:15,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:15,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,489 INFO L124 PetriNetUnfolderBase]: 251/529 cut-off events. [2025-02-08 08:41:15,489 INFO L125 PetriNetUnfolderBase]: For 1079/1079 co-relation queries the response was YES. [2025-02-08 08:41:15,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1879 conditions, 529 events. 251/529 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2525 event pairs, 33 based on Foata normal form. 1/530 useless extension candidates. Maximal degree in co-relation 1852. Up to 329 conditions per place. [2025-02-08 08:41:15,492 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 63 selfloop transitions, 24 changer transitions 5/95 dead transitions. [2025-02-08 08:41:15,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 95 transitions, 758 flow [2025-02-08 08:41:15,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2025-02-08 08:41:15,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-02-08 08:41:15,493 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 436 flow. Second operand 10 states and 150 transitions. [2025-02-08 08:41:15,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 95 transitions, 758 flow [2025-02-08 08:41:15,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 717 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:15,498 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 496 flow [2025-02-08 08:41:15,498 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=496, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2025-02-08 08:41:15,498 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2025-02-08 08:41:15,498 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 496 flow [2025-02-08 08:41:15,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,498 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,498 INFO L206 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] [2025-02-08 08:41:15,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-08 08:41:15,499 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:15,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1604936940, now seen corresponding path program 7 times [2025-02-08 08:41:15,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248074744] [2025-02-08 08:41:15,499 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:41:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 08:41:15,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:15,510 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:15,510 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:15,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248074744] [2025-02-08 08:41:15,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248074744] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:15,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602725197] [2025-02-08 08:41:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:15,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:15,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:15,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:15,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:15,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:15,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 496 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:15,937 INFO L124 PetriNetUnfolderBase]: 220/479 cut-off events. [2025-02-08 08:41:15,937 INFO L125 PetriNetUnfolderBase]: For 1596/1604 co-relation queries the response was YES. [2025-02-08 08:41:15,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 479 events. 220/479 cut-off events. For 1596/1604 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2315 event pairs, 25 based on Foata normal form. 9/488 useless extension candidates. Maximal degree in co-relation 1830. Up to 306 conditions per place. [2025-02-08 08:41:15,943 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 54 selfloop transitions, 22 changer transitions 8/88 dead transitions. [2025-02-08 08:41:15,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 767 flow [2025-02-08 08:41:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2025-02-08 08:41:15,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2025-02-08 08:41:15,944 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 496 flow. Second operand 10 states and 150 transitions. [2025-02-08 08:41:15,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 767 flow [2025-02-08 08:41:15,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 88 transitions, 712 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-02-08 08:41:15,951 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 494 flow [2025-02-08 08:41:15,951 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=494, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2025-02-08 08:41:15,952 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 45 predicate places. [2025-02-08 08:41:15,952 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 494 flow [2025-02-08 08:41:15,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:15,952 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:15,952 INFO L206 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] [2025-02-08 08:41:15,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-08 08:41:15,953 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:15,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 153807736, now seen corresponding path program 8 times [2025-02-08 08:41:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:15,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213782799] [2025-02-08 08:41:15,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:15,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:41:15,974 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:15,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:15,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:16,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213782799] [2025-02-08 08:41:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213782799] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:16,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999603338] [2025-02-08 08:41:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:16,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:16,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:16,222 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:16,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 494 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:16,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,480 INFO L124 PetriNetUnfolderBase]: 258/548 cut-off events. [2025-02-08 08:41:16,480 INFO L125 PetriNetUnfolderBase]: For 1872/1884 co-relation queries the response was YES. [2025-02-08 08:41:16,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 548 events. 258/548 cut-off events. For 1872/1884 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2675 event pairs, 43 based on Foata normal form. 3/551 useless extension candidates. Maximal degree in co-relation 2071. Up to 344 conditions per place. [2025-02-08 08:41:16,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 68 selfloop transitions, 24 changer transitions 5/100 dead transitions. [2025-02-08 08:41:16,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 873 flow [2025-02-08 08:41:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2025-02-08 08:41:16,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3825 [2025-02-08 08:41:16,488 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 494 flow. Second operand 10 states and 153 transitions. [2025-02-08 08:41:16,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 873 flow [2025-02-08 08:41:16,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 100 transitions, 819 flow, removed 5 selfloop flow, removed 8 redundant places. [2025-02-08 08:41:16,497 INFO L231 Difference]: Finished difference. Result has 88 places, 69 transitions, 553 flow [2025-02-08 08:41:16,497 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=553, PETRI_PLACES=88, PETRI_TRANSITIONS=69} [2025-02-08 08:41:16,498 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 48 predicate places. [2025-02-08 08:41:16,498 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 69 transitions, 553 flow [2025-02-08 08:41:16,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:16,501 INFO L206 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] [2025-02-08 08:41:16,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-08 08:41:16,502 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:16,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -740612180, now seen corresponding path program 9 times [2025-02-08 08:41:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:16,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336610850] [2025-02-08 08:41:16,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:16,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:16,510 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:41:16,522 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 22 statements. [2025-02-08 08:41:16,522 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:16,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:16,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:16,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336610850] [2025-02-08 08:41:16,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336610850] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:16,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:16,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:16,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753523388] [2025-02-08 08:41:16,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:16,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:16,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:16,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:16,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:16,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:16,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 69 transitions, 553 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:16,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:16,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:16,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:16,989 INFO L124 PetriNetUnfolderBase]: 254/535 cut-off events. [2025-02-08 08:41:16,989 INFO L125 PetriNetUnfolderBase]: For 2540/2560 co-relation queries the response was YES. [2025-02-08 08:41:16,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 535 events. 254/535 cut-off events. For 2540/2560 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2557 event pairs, 55 based on Foata normal form. 11/546 useless extension candidates. Maximal degree in co-relation 2167. Up to 344 conditions per place. [2025-02-08 08:41:16,993 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 23 changer transitions 8/96 dead transitions. [2025-02-08 08:41:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 886 flow [2025-02-08 08:41:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2025-02-08 08:41:16,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3725 [2025-02-08 08:41:16,994 INFO L175 Difference]: Start difference. First operand has 88 places, 69 transitions, 553 flow. Second operand 10 states and 149 transitions. [2025-02-08 08:41:16,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 886 flow [2025-02-08 08:41:16,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 821 flow, removed 13 selfloop flow, removed 6 redundant places. [2025-02-08 08:41:16,999 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 545 flow [2025-02-08 08:41:16,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2025-02-08 08:41:17,000 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 52 predicate places. [2025-02-08 08:41:17,000 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 545 flow [2025-02-08 08:41:17,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,000 INFO L206 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] [2025-02-08 08:41:17,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-08 08:41:17,000 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:17,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1313889294, now seen corresponding path program 10 times [2025-02-08 08:41:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472965487] [2025-02-08 08:41:17,001 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:17,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,005 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-08 08:41:17,011 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:17,011 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:17,011 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472965487] [2025-02-08 08:41:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472965487] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:17,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:17,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279733701] [2025-02-08 08:41:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:17,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:17,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:17,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:17,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:17,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:17,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:17,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:17,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,441 INFO L124 PetriNetUnfolderBase]: 268/570 cut-off events. [2025-02-08 08:41:17,442 INFO L125 PetriNetUnfolderBase]: For 2863/2887 co-relation queries the response was YES. [2025-02-08 08:41:17,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2334 conditions, 570 events. 268/570 cut-off events. For 2863/2887 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2787 event pairs, 53 based on Foata normal form. 5/575 useless extension candidates. Maximal degree in co-relation 2299. Up to 359 conditions per place. [2025-02-08 08:41:17,445 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 23 changer transitions 5/104 dead transitions. [2025-02-08 08:41:17,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 104 transitions, 955 flow [2025-02-08 08:41:17,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2025-02-08 08:41:17,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-02-08 08:41:17,447 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 545 flow. Second operand 10 states and 155 transitions. [2025-02-08 08:41:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 104 transitions, 955 flow [2025-02-08 08:41:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 897 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-08 08:41:17,452 INFO L231 Difference]: Finished difference. Result has 95 places, 73 transitions, 610 flow [2025-02-08 08:41:17,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=610, PETRI_PLACES=95, PETRI_TRANSITIONS=73} [2025-02-08 08:41:17,453 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2025-02-08 08:41:17,453 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 73 transitions, 610 flow [2025-02-08 08:41:17,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,453 INFO L206 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] [2025-02-08 08:41:17,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-08 08:41:17,453 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:17,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1246955842, now seen corresponding path program 11 times [2025-02-08 08:41:17,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725284491] [2025-02-08 08:41:17,454 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,458 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 3 equivalence classes. [2025-02-08 08:41:17,464 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 08:41:17,464 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:17,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725284491] [2025-02-08 08:41:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725284491] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:17,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:17,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-02-08 08:41:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133979742] [2025-02-08 08:41:17,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:17,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:17,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:17,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:17,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2025-02-08 08:41:17,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 73 transitions, 610 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:17,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2025-02-08 08:41:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,838 INFO L124 PetriNetUnfolderBase]: 237/517 cut-off events. [2025-02-08 08:41:17,838 INFO L125 PetriNetUnfolderBase]: For 3543/3575 co-relation queries the response was YES. [2025-02-08 08:41:17,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 517 events. 237/517 cut-off events. For 3543/3575 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2529 event pairs, 45 based on Foata normal form. 13/529 useless extension candidates. Maximal degree in co-relation 2227. Up to 336 conditions per place. [2025-02-08 08:41:17,842 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 21 changer transitions 8/95 dead transitions. [2025-02-08 08:41:17,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 95 transitions, 933 flow [2025-02-08 08:41:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2025-02-08 08:41:17,843 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3825 [2025-02-08 08:41:17,843 INFO L175 Difference]: Start difference. First operand has 95 places, 73 transitions, 610 flow. Second operand 10 states and 153 transitions. [2025-02-08 08:41:17,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 95 transitions, 933 flow [2025-02-08 08:41:17,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 95 transitions, 860 flow, removed 18 selfloop flow, removed 6 redundant places. [2025-02-08 08:41:17,849 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 592 flow [2025-02-08 08:41:17,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=592, PETRI_PLACES=99, PETRI_TRANSITIONS=73} [2025-02-08 08:41:17,849 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 59 predicate places. [2025-02-08 08:41:17,849 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 592 flow [2025-02-08 08:41:17,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:17,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:17,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-08 08:41:17,850 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:17,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash 844303539, now seen corresponding path program 1 times [2025-02-08 08:41:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691638814] [2025-02-08 08:41:17,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:41:17,857 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:17,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691638814] [2025-02-08 08:41:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691638814] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295106341] [2025-02-08 08:41:17,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:17,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:17,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:17,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:41:17,961 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-08 08:41:17,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:41:17,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:17,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:17,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,036 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295106341] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:18,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:18,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2025-02-08 08:41:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499172612] [2025-02-08 08:41:18,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:18,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:41:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:18,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:41:18,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:18,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-02-08 08:41:18,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 592 flow. Second operand has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:18,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-02-08 08:41:18,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:18,331 INFO L124 PetriNetUnfolderBase]: 383/919 cut-off events. [2025-02-08 08:41:18,331 INFO L125 PetriNetUnfolderBase]: For 6920/6970 co-relation queries the response was YES. [2025-02-08 08:41:18,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 919 events. 383/919 cut-off events. For 6920/6970 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5611 event pairs, 163 based on Foata normal form. 38/956 useless extension candidates. Maximal degree in co-relation 4006. Up to 399 conditions per place. [2025-02-08 08:41:18,336 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 124 selfloop transitions, 8 changer transitions 13/150 dead transitions. [2025-02-08 08:41:18,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 1540 flow [2025-02-08 08:41:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:41:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:41:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2025-02-08 08:41:18,337 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43125 [2025-02-08 08:41:18,337 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 592 flow. Second operand 8 states and 138 transitions. [2025-02-08 08:41:18,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 1540 flow [2025-02-08 08:41:18,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 150 transitions, 1420 flow, removed 12 selfloop flow, removed 8 redundant places. [2025-02-08 08:41:18,349 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 629 flow [2025-02-08 08:41:18,349 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=629, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2025-02-08 08:41:18,349 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 61 predicate places. [2025-02-08 08:41:18,349 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 629 flow [2025-02-08 08:41:18,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.5) internal successors, (189), 14 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,350 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:18,350 INFO L206 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] [2025-02-08 08:41:18,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:18,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:41:18,554 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:18,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1618238666, now seen corresponding path program 1 times [2025-02-08 08:41:18,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:18,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589319536] [2025-02-08 08:41:18,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:18,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:18,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:18,564 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:18,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:18,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:18,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589319536] [2025-02-08 08:41:18,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589319536] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:18,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983380506] [2025-02-08 08:41:18,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:18,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:18,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:18,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:18,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:41:18,696 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-02-08 08:41:18,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-02-08 08:41:18,717 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:18,717 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:18,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:41:18,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:18,776 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:41:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983380506] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:18,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:41:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-08 08:41:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627912524] [2025-02-08 08:41:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:18,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:18,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:18,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:41:18,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2025-02-08 08:41:18,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 629 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:18,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2025-02-08 08:41:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:18,902 INFO L124 PetriNetUnfolderBase]: 341/861 cut-off events. [2025-02-08 08:41:18,902 INFO L125 PetriNetUnfolderBase]: For 8403/8550 co-relation queries the response was YES. [2025-02-08 08:41:18,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3792 conditions, 861 events. 341/861 cut-off events. For 8403/8550 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5133 event pairs, 98 based on Foata normal form. 83/943 useless extension candidates. Maximal degree in co-relation 3714. Up to 322 conditions per place. [2025-02-08 08:41:18,907 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 58 selfloop transitions, 7 changer transitions 27/97 dead transitions. [2025-02-08 08:41:18,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 933 flow [2025-02-08 08:41:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-02-08 08:41:18,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56875 [2025-02-08 08:41:18,908 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 629 flow. Second operand 4 states and 91 transitions. [2025-02-08 08:41:18,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 933 flow [2025-02-08 08:41:18,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 97 transitions, 825 flow, removed 25 selfloop flow, removed 13 redundant places. [2025-02-08 08:41:18,921 INFO L231 Difference]: Finished difference. Result has 93 places, 44 transitions, 326 flow [2025-02-08 08:41:18,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=93, PETRI_TRANSITIONS=44} [2025-02-08 08:41:18,922 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 53 predicate places. [2025-02-08 08:41:18,922 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 44 transitions, 326 flow [2025-02-08 08:41:18,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:18,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:18,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:18,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:19,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:19,127 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:19,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash 719923299, now seen corresponding path program 2 times [2025-02-08 08:41:19,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:19,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954649528] [2025-02-08 08:41:19,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:19,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:19,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:19,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:19,152 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:19,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:19,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954649528] [2025-02-08 08:41:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954649528] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183112087] [2025-02-08 08:41:19,564 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:19,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:19,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:19,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:19,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:41:19,603 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:19,625 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:19,625 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:19,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:19,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 08:41:19,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:19,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:19,885 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 08:41:19,885 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 25 treesize of output 12 [2025-02-08 08:41:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183112087] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:20,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 26 [2025-02-08 08:41:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623904320] [2025-02-08 08:41:20,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:20,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-08 08:41:20,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:20,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-08 08:41:20,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2025-02-08 08:41:20,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:41:20,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 44 transitions, 326 flow. Second operand has 27 states, 27 states have (on average 9.555555555555555) internal successors, (258), 27 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:20,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:20,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:41:20,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:22,542 INFO L124 PetriNetUnfolderBase]: 1570/2859 cut-off events. [2025-02-08 08:41:22,543 INFO L125 PetriNetUnfolderBase]: For 37622/37622 co-relation queries the response was YES. [2025-02-08 08:41:22,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13291 conditions, 2859 events. 1570/2859 cut-off events. For 37622/37622 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 16152 event pairs, 95 based on Foata normal form. 147/3006 useless extension candidates. Maximal degree in co-relation 13048. Up to 675 conditions per place. [2025-02-08 08:41:22,564 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 330 selfloop transitions, 149 changer transitions 0/481 dead transitions. [2025-02-08 08:41:22,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 481 transitions, 4251 flow [2025-02-08 08:41:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-02-08 08:41:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-02-08 08:41:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 893 transitions. [2025-02-08 08:41:22,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36598360655737705 [2025-02-08 08:41:22,567 INFO L175 Difference]: Start difference. First operand has 93 places, 44 transitions, 326 flow. Second operand 61 states and 893 transitions. [2025-02-08 08:41:22,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 481 transitions, 4251 flow [2025-02-08 08:41:22,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 481 transitions, 3109 flow, removed 556 selfloop flow, removed 18 redundant places. [2025-02-08 08:41:22,593 INFO L231 Difference]: Finished difference. Result has 146 places, 218 transitions, 1967 flow [2025-02-08 08:41:22,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1967, PETRI_PLACES=146, PETRI_TRANSITIONS=218} [2025-02-08 08:41:22,594 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 106 predicate places. [2025-02-08 08:41:22,594 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 218 transitions, 1967 flow [2025-02-08 08:41:22,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.555555555555555) internal successors, (258), 27 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:22,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:22,595 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:22,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:22,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:22,799 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:22,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2004903387, now seen corresponding path program 3 times [2025-02-08 08:41:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622462297] [2025-02-08 08:41:22,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:22,808 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 5 equivalence classes. [2025-02-08 08:41:22,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 29 statements. [2025-02-08 08:41:22,816 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:22,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:22,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622462297] [2025-02-08 08:41:22,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622462297] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:22,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:22,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-08 08:41:22,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258329752] [2025-02-08 08:41:22,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:22,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:41:22,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:22,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:41:22,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:41:22,905 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:22,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 218 transitions, 1967 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:22,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:22,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:22,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:23,296 INFO L124 PetriNetUnfolderBase]: 1803/3358 cut-off events. [2025-02-08 08:41:23,296 INFO L125 PetriNetUnfolderBase]: For 41620/41621 co-relation queries the response was YES. [2025-02-08 08:41:23,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17417 conditions, 3358 events. 1803/3358 cut-off events. For 41620/41621 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 20040 event pairs, 234 based on Foata normal form. 24/3380 useless extension candidates. Maximal degree in co-relation 13874. Up to 1320 conditions per place. [2025-02-08 08:41:23,324 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 264 selfloop transitions, 45 changer transitions 2/315 dead transitions. [2025-02-08 08:41:23,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 315 transitions, 3420 flow [2025-02-08 08:41:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:41:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:41:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2025-02-08 08:41:23,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-02-08 08:41:23,325 INFO L175 Difference]: Start difference. First operand has 146 places, 218 transitions, 1967 flow. Second operand 6 states and 104 transitions. [2025-02-08 08:41:23,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 315 transitions, 3420 flow [2025-02-08 08:41:23,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 315 transitions, 2816 flow, removed 298 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:23,398 INFO L231 Difference]: Finished difference. Result has 151 places, 221 transitions, 1729 flow [2025-02-08 08:41:23,398 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1729, PETRI_PLACES=151, PETRI_TRANSITIONS=221} [2025-02-08 08:41:23,399 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2025-02-08 08:41:23,399 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 221 transitions, 1729 flow [2025-02-08 08:41:23,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:23,399 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:23,399 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:23,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-02-08 08:41:23,399 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:23,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:23,399 INFO L85 PathProgramCache]: Analyzing trace with hash -477907027, now seen corresponding path program 4 times [2025-02-08 08:41:23,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:23,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451090978] [2025-02-08 08:41:23,400 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:23,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:23,405 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-08 08:41:23,411 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:41:23,415 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:23,416 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:23,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451090978] [2025-02-08 08:41:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451090978] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:23,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255503885] [2025-02-08 08:41:23,479 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:23,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:23,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:41:23,522 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-02-08 08:41:23,542 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:41:23,543 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:23,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:23,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:23,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:23,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:23,666 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-02-08 08:41:23,667 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 25 treesize of output 12 [2025-02-08 08:41:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-08 08:41:23,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255503885] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:23,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:23,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:41:23,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314486864] [2025-02-08 08:41:23,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:23,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-08 08:41:23,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:23,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-08 08:41:23,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:23,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2025-02-08 08:41:23,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 221 transitions, 1729 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:23,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:23,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2025-02-08 08:41:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:24,232 INFO L124 PetriNetUnfolderBase]: 1783/3337 cut-off events. [2025-02-08 08:41:24,232 INFO L125 PetriNetUnfolderBase]: For 48023/48024 co-relation queries the response was YES. [2025-02-08 08:41:24,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 3337 events. 1783/3337 cut-off events. For 48023/48024 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19945 event pairs, 146 based on Foata normal form. 67/3402 useless extension candidates. Maximal degree in co-relation 14661. Up to 988 conditions per place. [2025-02-08 08:41:24,250 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 216 selfloop transitions, 70 changer transitions 0/290 dead transitions. [2025-02-08 08:41:24,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 290 transitions, 2944 flow [2025-02-08 08:41:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 08:41:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-08 08:41:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2025-02-08 08:41:24,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4275 [2025-02-08 08:41:24,251 INFO L175 Difference]: Start difference. First operand has 151 places, 221 transitions, 1729 flow. Second operand 10 states and 171 transitions. [2025-02-08 08:41:24,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 290 transitions, 2944 flow [2025-02-08 08:41:24,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 290 transitions, 2912 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-02-08 08:41:24,316 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 1998 flow [2025-02-08 08:41:24,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1998, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2025-02-08 08:41:24,317 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 122 predicate places. [2025-02-08 08:41:24,317 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 1998 flow [2025-02-08 08:41:24,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:24,317 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:24,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:24,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-02-08 08:41:24,518 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:24,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:24,518 INFO L85 PathProgramCache]: Analyzing trace with hash -769801713, now seen corresponding path program 1 times [2025-02-08 08:41:24,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:24,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558588841] [2025-02-08 08:41:24,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:24,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:24,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:41:24,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:24,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:24,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:25,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:25,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558588841] [2025-02-08 08:41:25,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558588841] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:25,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247731393] [2025-02-08 08:41:25,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:25,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:25,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:25,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:25,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:41:25,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:41:25,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:25,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:25,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:25,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-02-08 08:41:25,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:26,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:26,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:26,597 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 42 treesize of output 34 [2025-02-08 08:41:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247731393] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:27,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2025-02-08 08:41:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119383101] [2025-02-08 08:41:27,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:27,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2025-02-08 08:41:27,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:27,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2025-02-08 08:41:27,264 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2387, Unknown=0, NotChecked=0, Total=2652 [2025-02-08 08:41:27,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:41:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 1998 flow. Second operand has 52 states, 52 states have (on average 8.615384615384615) internal successors, (448), 52 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:27,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:27,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:41:27,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:31,779 INFO L124 PetriNetUnfolderBase]: 3020/5555 cut-off events. [2025-02-08 08:41:31,780 INFO L125 PetriNetUnfolderBase]: For 73908/73908 co-relation queries the response was YES. [2025-02-08 08:41:31,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28558 conditions, 5555 events. 3020/5555 cut-off events. For 73908/73908 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 37036 event pairs, 232 based on Foata normal form. 3/5558 useless extension candidates. Maximal degree in co-relation 26563. Up to 3218 conditions per place. [2025-02-08 08:41:31,814 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 355 selfloop transitions, 226 changer transitions 10/593 dead transitions. [2025-02-08 08:41:31,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 593 transitions, 6554 flow [2025-02-08 08:41:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-02-08 08:41:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-02-08 08:41:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 535 transitions. [2025-02-08 08:41:31,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2907608695652174 [2025-02-08 08:41:31,815 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 1998 flow. Second operand 46 states and 535 transitions. [2025-02-08 08:41:31,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 593 transitions, 6554 flow [2025-02-08 08:41:32,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 593 transitions, 6176 flow, removed 70 selfloop flow, removed 13 redundant places. [2025-02-08 08:41:32,061 INFO L231 Difference]: Finished difference. Result has 206 places, 429 transitions, 5053 flow [2025-02-08 08:41:32,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5053, PETRI_PLACES=206, PETRI_TRANSITIONS=429} [2025-02-08 08:41:32,062 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 166 predicate places. [2025-02-08 08:41:32,062 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 429 transitions, 5053 flow [2025-02-08 08:41:32,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 8.615384615384615) internal successors, (448), 52 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:32,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:32,062 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:32,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:32,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-02-08 08:41:32,263 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:32,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:32,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1155454899, now seen corresponding path program 2 times [2025-02-08 08:41:32,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:32,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429638577] [2025-02-08 08:41:32,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:32,269 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-08 08:41:32,286 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:32,287 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:32,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:32,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429638577] [2025-02-08 08:41:32,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429638577] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:32,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577104962] [2025-02-08 08:41:32,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:32,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:32,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:32,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:41:32,925 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 31 statements into 2 equivalence classes. [2025-02-08 08:41:32,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:32,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:32,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:32,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjuncts are in the unsatisfiable core [2025-02-08 08:41:32,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:33,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:34,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:34,084 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 40 treesize of output 32 [2025-02-08 08:41:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:34,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577104962] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:34,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2025-02-08 08:41:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214033846] [2025-02-08 08:41:34,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:34,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-02-08 08:41:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:34,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-02-08 08:41:34,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2322, Unknown=0, NotChecked=0, Total=2550 [2025-02-08 08:41:34,661 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:41:34,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 429 transitions, 5053 flow. Second operand has 51 states, 51 states have (on average 8.647058823529411) internal successors, (441), 51 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:34,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:34,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:41:34,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:44,225 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] [2025-02-08 08:41:49,269 INFO L124 PetriNetUnfolderBase]: 3689/6900 cut-off events. [2025-02-08 08:41:49,270 INFO L125 PetriNetUnfolderBase]: For 90080/90080 co-relation queries the response was YES. [2025-02-08 08:41:49,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39310 conditions, 6900 events. 3689/6900 cut-off events. For 90080/90080 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 48901 event pairs, 182 based on Foata normal form. 4/6904 useless extension candidates. Maximal degree in co-relation 39224. Up to 3076 conditions per place. [2025-02-08 08:41:49,312 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 465 selfloop transitions, 553 changer transitions 15/1035 dead transitions. [2025-02-08 08:41:49,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1035 transitions, 12462 flow [2025-02-08 08:41:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2025-02-08 08:41:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2025-02-08 08:41:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 997 transitions. [2025-02-08 08:41:49,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2967261904761905 [2025-02-08 08:41:49,316 INFO L175 Difference]: Start difference. First operand has 206 places, 429 transitions, 5053 flow. Second operand 84 states and 997 transitions. [2025-02-08 08:41:49,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1035 transitions, 12462 flow [2025-02-08 08:41:49,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1035 transitions, 11977 flow, removed 228 selfloop flow, removed 10 redundant places. [2025-02-08 08:41:49,593 INFO L231 Difference]: Finished difference. Result has 301 places, 762 transitions, 10627 flow [2025-02-08 08:41:49,594 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4714, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=10627, PETRI_PLACES=301, PETRI_TRANSITIONS=762} [2025-02-08 08:41:49,594 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 261 predicate places. [2025-02-08 08:41:49,594 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 762 transitions, 10627 flow [2025-02-08 08:41:49,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 8.647058823529411) internal successors, (441), 51 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:49,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:49,595 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:49,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:41:49,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:49,799 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:49,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 851914907, now seen corresponding path program 3 times [2025-02-08 08:41:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326234772] [2025-02-08 08:41:49,800 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:49,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:49,804 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:41:49,811 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 31 statements. [2025-02-08 08:41:49,811 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:49,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:50,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326234772] [2025-02-08 08:41:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326234772] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:50,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800465051] [2025-02-08 08:41:50,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:50,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:50,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:41:50,285 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:41:50,305 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 31 statements. [2025-02-08 08:41:50,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:50,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:50,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-08 08:41:50,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:50,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:51,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:51,154 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 40 treesize of output 32 [2025-02-08 08:41:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:51,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800465051] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:51,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:51,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2025-02-08 08:41:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319493193] [2025-02-08 08:41:51,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:51,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-08 08:41:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:51,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-08 08:41:51,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 08:41:51,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:41:51,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 762 transitions, 10627 flow. Second operand has 36 states, 36 states have (on average 8.916666666666666) internal successors, (321), 36 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:51,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:51,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:41:51,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:53,839 INFO L124 PetriNetUnfolderBase]: 3792/7085 cut-off events. [2025-02-08 08:41:53,839 INFO L125 PetriNetUnfolderBase]: For 112047/112047 co-relation queries the response was YES. [2025-02-08 08:41:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45638 conditions, 7085 events. 3792/7085 cut-off events. For 112047/112047 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 50452 event pairs, 196 based on Foata normal form. 2/7087 useless extension candidates. Maximal degree in co-relation 45528. Up to 4135 conditions per place. [2025-02-08 08:41:53,892 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 546 selfloop transitions, 402 changer transitions 5/955 dead transitions. [2025-02-08 08:41:53,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 955 transitions, 14465 flow [2025-02-08 08:41:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 08:41:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-02-08 08:41:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 266 transitions. [2025-02-08 08:41:53,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3325 [2025-02-08 08:41:53,893 INFO L175 Difference]: Start difference. First operand has 301 places, 762 transitions, 10627 flow. Second operand 20 states and 266 transitions. [2025-02-08 08:41:53,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 955 transitions, 14465 flow [2025-02-08 08:41:54,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 955 transitions, 13422 flow, removed 477 selfloop flow, removed 13 redundant places. [2025-02-08 08:41:54,561 INFO L231 Difference]: Finished difference. Result has 315 places, 836 transitions, 12309 flow [2025-02-08 08:41:54,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9745, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12309, PETRI_PLACES=315, PETRI_TRANSITIONS=836} [2025-02-08 08:41:54,564 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 275 predicate places. [2025-02-08 08:41:54,564 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 836 transitions, 12309 flow [2025-02-08 08:41:54,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.916666666666666) internal successors, (321), 36 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:54,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:54,565 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:54,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 08:41:54,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:54,765 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:41:54,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1409274671, now seen corresponding path program 4 times [2025-02-08 08:41:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217698236] [2025-02-08 08:41:54,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:54,770 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-08 08:41:54,776 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:54,776 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:54,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:55,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217698236] [2025-02-08 08:41:55,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217698236] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:55,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263982944] [2025-02-08 08:41:55,385 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:55,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:55,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:55,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:41:55,425 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 31 statements into 2 equivalence classes. [2025-02-08 08:41:55,475 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:41:55,475 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:55,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:55,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 08:41:55,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:55,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:55,939 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 23 treesize of output 15 [2025-02-08 08:41:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:56,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:56,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:56,847 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 40 treesize of output 32 [2025-02-08 08:41:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:41:57,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263982944] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:57,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:57,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2025-02-08 08:41:57,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668925237] [2025-02-08 08:41:57,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:57,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-02-08 08:41:57,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:57,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-02-08 08:41:57,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1577, Unknown=0, NotChecked=0, Total=1806 [2025-02-08 08:41:57,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:41:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 836 transitions, 12309 flow. Second operand has 43 states, 43 states have (on average 8.813953488372093) internal successors, (379), 43 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:41:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:05,452 INFO L124 PetriNetUnfolderBase]: 4054/7690 cut-off events. [2025-02-08 08:42:05,452 INFO L125 PetriNetUnfolderBase]: For 129453/129453 co-relation queries the response was YES. [2025-02-08 08:42:05,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51918 conditions, 7690 events. 4054/7690 cut-off events. For 129453/129453 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 56628 event pairs, 190 based on Foata normal form. 10/7700 useless extension candidates. Maximal degree in co-relation 51815. Up to 4192 conditions per place. [2025-02-08 08:42:05,514 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 532 selfloop transitions, 671 changer transitions 45/1250 dead transitions. [2025-02-08 08:42:05,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1250 transitions, 19978 flow [2025-02-08 08:42:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-02-08 08:42:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2025-02-08 08:42:05,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 615 transitions. [2025-02-08 08:42:05,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3014705882352941 [2025-02-08 08:42:05,522 INFO L175 Difference]: Start difference. First operand has 315 places, 836 transitions, 12309 flow. Second operand 51 states and 615 transitions. [2025-02-08 08:42:05,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1250 transitions, 19978 flow [2025-02-08 08:42:06,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1250 transitions, 19710 flow, removed 88 selfloop flow, removed 6 redundant places. [2025-02-08 08:42:06,337 INFO L231 Difference]: Finished difference. Result has 383 places, 1096 transitions, 18743 flow [2025-02-08 08:42:06,339 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12061, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=18743, PETRI_PLACES=383, PETRI_TRANSITIONS=1096} [2025-02-08 08:42:06,339 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 343 predicate places. [2025-02-08 08:42:06,339 INFO L471 AbstractCegarLoop]: Abstraction has has 383 places, 1096 transitions, 18743 flow [2025-02-08 08:42:06,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.813953488372093) internal successors, (379), 43 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:06,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:06,340 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:06,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:42:06,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:06,544 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:42:06,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:06,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1753915611, now seen corresponding path program 5 times [2025-02-08 08:42:06,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:06,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035363969] [2025-02-08 08:42:06,545 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:42:06,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:06,550 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:42:06,563 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:42:06,563 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:42:06,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:42:06,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035363969] [2025-02-08 08:42:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035363969] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65047694] [2025-02-08 08:42:06,922 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:42:06,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:06,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:06,927 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:06,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:42:06,969 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:42:07,008 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:42:07,009 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:42:07,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:07,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-02-08 08:42:07,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:42:07,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:08,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:08,114 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 32 treesize of output 24 [2025-02-08 08:42:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-08 08:42:08,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65047694] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:08,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 34 [2025-02-08 08:42:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562335057] [2025-02-08 08:42:08,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:08,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-08 08:42:08,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:08,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-08 08:42:08,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2025-02-08 08:42:08,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:42:08,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1096 transitions, 18743 flow. Second operand has 35 states, 35 states have (on average 9.0) internal successors, (315), 35 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:08,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:08,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:42:08,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:11,351 INFO L124 PetriNetUnfolderBase]: 4261/8056 cut-off events. [2025-02-08 08:42:11,351 INFO L125 PetriNetUnfolderBase]: For 169054/169054 co-relation queries the response was YES. [2025-02-08 08:42:11,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61224 conditions, 8056 events. 4261/8056 cut-off events. For 169054/169054 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 59841 event pairs, 233 based on Foata normal form. 4/8060 useless extension candidates. Maximal degree in co-relation 61074. Up to 3192 conditions per place. [2025-02-08 08:42:11,448 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 752 selfloop transitions, 517 changer transitions 5/1276 dead transitions. [2025-02-08 08:42:11,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1276 transitions, 23561 flow [2025-02-08 08:42:11,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-08 08:42:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-02-08 08:42:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 276 transitions. [2025-02-08 08:42:11,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2025-02-08 08:42:11,449 INFO L175 Difference]: Start difference. First operand has 383 places, 1096 transitions, 18743 flow. Second operand 21 states and 276 transitions. [2025-02-08 08:42:11,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1276 transitions, 23561 flow [2025-02-08 08:42:12,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1276 transitions, 22912 flow, removed 290 selfloop flow, removed 12 redundant places. [2025-02-08 08:42:12,779 INFO L231 Difference]: Finished difference. Result has 390 places, 1153 transitions, 20820 flow [2025-02-08 08:42:12,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18178, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=461, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20820, PETRI_PLACES=390, PETRI_TRANSITIONS=1153} [2025-02-08 08:42:12,781 INFO L279 CegarLoopForPetriNet]: 40 programPoint places, 350 predicate places. [2025-02-08 08:42:12,781 INFO L471 AbstractCegarLoop]: Abstraction has has 390 places, 1153 transitions, 20820 flow [2025-02-08 08:42:12,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.0) internal successors, (315), 35 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:12,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:12,781 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:12,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 08:42:12,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-08 08:42:12,982 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2025-02-08 08:42:12,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:12,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1609210927, now seen corresponding path program 6 times [2025-02-08 08:42:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:12,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003978728] [2025-02-08 08:42:12,983 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:42:12,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:12,987 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:42:12,994 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 29 of 31 statements. [2025-02-08 08:42:12,994 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:42:12,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:42:13,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:13,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003978728] [2025-02-08 08:42:13,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003978728] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:13,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755909439] [2025-02-08 08:42:13,828 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:42:13,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:13,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:13,830 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:13,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:42:13,868 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 31 statements into 4 equivalence classes. [2025-02-08 08:42:13,887 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 29 of 31 statements. [2025-02-08 08:42:13,887 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:42:13,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:13,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-02-08 08:42:13,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:14,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:14,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2025-02-08 08:42:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:42:14,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:15,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:42:15,675 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 40 treesize of output 32 [2025-02-08 08:42:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:42:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755909439] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:16,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:16,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2025-02-08 08:42:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784738481] [2025-02-08 08:42:16,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:16,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-08 08:42:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:16,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-08 08:42:16,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2476, Unknown=0, NotChecked=0, Total=2756 [2025-02-08 08:42:16,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2025-02-08 08:42:16,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1153 transitions, 20820 flow. Second operand has 53 states, 53 states have (on average 8.584905660377359) internal successors, (455), 53 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:42:16,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:16,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2025-02-08 08:42:16,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand