./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:31:52,907 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:31:52,966 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:31:52,970 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:31:52,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:31:52,990 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:31:52,991 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:31:52,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:31:52,992 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:31:52,992 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:31:52,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:31:52,992 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:31:52,993 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:31:52,993 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:31:52,993 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:31:52,994 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:52,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:31:52,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:31:52,994 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/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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2025-03-17 14:31:53,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:31:53,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:31:53,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:31:53,295 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:31:53,295 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:31:53,296 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-03-17 14:31:54,412 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c873a5248/4a479fdd242845b0917f5eb71fb70e0c/FLAG7ed0b6fd7 [2025-03-17 14:31:54,622 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:31:54,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-03-17 14:31:54,635 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c873a5248/4a479fdd242845b0917f5eb71fb70e0c/FLAG7ed0b6fd7 [2025-03-17 14:31:54,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c873a5248/4a479fdd242845b0917f5eb71fb70e0c [2025-03-17 14:31:54,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:31:54,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:31:54,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:54,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:31:54,652 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:31:54,653 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,653 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a72b5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54, skipping insertion in model container [2025-03-17 14:31:54,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,672 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:31:54,800 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:31:54,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:54,814 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:31:54,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:31:54,851 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:31:54,852 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54 WrapperNode [2025-03-17 14:31:54,852 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:31:54,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:54,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:31:54,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:31:54,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,884 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 141 [2025-03-17 14:31:54,886 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:31:54,887 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:31:54,887 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:31:54,887 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:31:54,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,899 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,911 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]. [2025-03-17 14:31:54,912 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,912 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,917 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,918 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,919 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:31:54,923 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:31:54,924 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:31:54,924 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:31:54,924 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (1/1) ... [2025-03-17 14:31:54,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:31:54,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:54,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 14:31:54,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:31:54,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:31:54,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:31:54,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:31:54,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:31:54,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:31:54,968 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:31:55,037 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:31:55,039 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:31:55,257 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:31:55,258 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:31:55,383 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:31:55,384 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:31:55,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:55 BoogieIcfgContainer [2025-03-17 14:31:55,384 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:31:55,386 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:31:55,386 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:31:55,389 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:31:55,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:31:54" (1/3) ... [2025-03-17 14:31:55,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147db20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:55, skipping insertion in model container [2025-03-17 14:31:55,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:31:54" (2/3) ... [2025-03-17 14:31:55,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147db20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:31:55, skipping insertion in model container [2025-03-17 14:31:55,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:31:55" (3/3) ... [2025-03-17 14:31:55,391 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2025-03-17 14:31:55,401 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:31:55,403 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 45 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-03-17 14:31:55,403 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:31:55,444 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:31:55,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 117 flow [2025-03-17 14:31:55,499 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2025-03-17 14:31:55,502 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:31:55,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 4/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 96 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-03-17 14:31:55,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 48 transitions, 117 flow [2025-03-17 14:31:55,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 106 flow [2025-03-17 14:31:55,516 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:31:55,527 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;@264e3433, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:31:55,528 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-03-17 14:31:55,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:31:55,531 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:31:55,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:31:55,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:55,532 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:55,533 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:55,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash 385473, now seen corresponding path program 1 times [2025-03-17 14:31:55,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:55,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133722508] [2025-03-17 14:31:55,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:55,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:55,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:55,631 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:55,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:55,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:55,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:55,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133722508] [2025-03-17 14:31:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133722508] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:55,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:31:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122749233] [2025-03-17 14:31:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:55,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:55,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:55,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:55,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 14:31:55,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:55,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:55,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 14:31:55,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:56,062 INFO L124 PetriNetUnfolderBase]: 1137/1761 cut-off events. [2025-03-17 14:31:56,063 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2025-03-17 14:31:56,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 1761 events. 1137/1761 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9550 event pairs, 952 based on Foata normal form. 1/1244 useless extension candidates. Maximal degree in co-relation 3368. Up to 1664 conditions per place. [2025-03-17 14:31:56,078 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 30 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-03-17 14:31:56,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 164 flow [2025-03-17 14:31:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:56,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-03-17 14:31:56,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2025-03-17 14:31:56,088 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 106 flow. Second operand 3 states and 73 transitions. [2025-03-17 14:31:56,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 164 flow [2025-03-17 14:31:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 152 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:31:56,099 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 92 flow [2025-03-17 14:31:56,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-03-17 14:31:56,105 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2025-03-17 14:31:56,106 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 92 flow [2025-03-17 14:31:56,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:56,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:56,106 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:31:56,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:31:56,106 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:56,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:56,107 INFO L85 PathProgramCache]: Analyzing trace with hash 385474, now seen corresponding path program 1 times [2025-03-17 14:31:56,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:56,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010038669] [2025-03-17 14:31:56,108 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:56,116 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:31:56,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:31:56,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:56,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010038669] [2025-03-17 14:31:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010038669] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:56,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:31:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952042234] [2025-03-17 14:31:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:56,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:56,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:56,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:56,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:56,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 14:31:56,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:56,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:56,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 14:31:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:56,546 INFO L124 PetriNetUnfolderBase]: 1138/1764 cut-off events. [2025-03-17 14:31:56,546 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:31:56,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3507 conditions, 1764 events. 1138/1764 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9547 event pairs, 952 based on Foata normal form. 0/1246 useless extension candidates. Maximal degree in co-relation 3485. Up to 1669 conditions per place. [2025-03-17 14:31:56,557 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-03-17 14:31:56,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 172 flow [2025-03-17 14:31:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2025-03-17 14:31:56,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2025-03-17 14:31:56,560 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 92 flow. Second operand 4 states and 89 transitions. [2025-03-17 14:31:56,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 172 flow [2025-03-17 14:31:56,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:56,561 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 115 flow [2025-03-17 14:31:56,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2025-03-17 14:31:56,562 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2025-03-17 14:31:56,562 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 115 flow [2025-03-17 14:31:56,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:56,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:56,562 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:31:56,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:31:56,562 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:56,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:56,564 INFO L85 PathProgramCache]: Analyzing trace with hash 370453120, now seen corresponding path program 1 times [2025-03-17 14:31:56,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:56,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085629377] [2025-03-17 14:31:56,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:56,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:56,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:56,583 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:56,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:56,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085629377] [2025-03-17 14:31:56,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085629377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:56,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542642839] [2025-03-17 14:31:56,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:56,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:56,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:56,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:56,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:31:56,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:31:56,847 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:31:56,847 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:56,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:56,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:31:56,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:56,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:31:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:57,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:31:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:57,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542642839] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:31:57,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:31:57,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:31:57,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605272980] [2025-03-17 14:31:57,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:31:57,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:31:57,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:57,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:31:57,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:31:57,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 14:31:57,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 14:31:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:57,533 INFO L124 PetriNetUnfolderBase]: 1138/1763 cut-off events. [2025-03-17 14:31:57,533 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:31:57,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1763 events. 1138/1763 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 9529 event pairs, 952 based on Foata normal form. 0/1245 useless extension candidates. Maximal degree in co-relation 3492. Up to 1665 conditions per place. [2025-03-17 14:31:57,542 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 28 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2025-03-17 14:31:57,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 181 flow [2025-03-17 14:31:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:31:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:31:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-03-17 14:31:57,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2025-03-17 14:31:57,544 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 115 flow. Second operand 6 states and 114 transitions. [2025-03-17 14:31:57,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 181 flow [2025-03-17 14:31:57,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:57,545 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 122 flow [2025-03-17 14:31:57,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2025-03-17 14:31:57,546 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2025-03-17 14:31:57,546 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 122 flow [2025-03-17 14:31:57,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:57,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:57,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:57,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:31:57,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:57,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:57,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -403247850, now seen corresponding path program 1 times [2025-03-17 14:31:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:57,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144356920] [2025-03-17 14:31:57,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:57,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:57,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:31:57,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:31:57,763 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:57,763 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144356920] [2025-03-17 14:31:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144356920] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:57,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:57,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:31:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407202949] [2025-03-17 14:31:57,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:57,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:31:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:57,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:31:57,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:31:57,798 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:57,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:57,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:57,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:57,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:57,999 INFO L124 PetriNetUnfolderBase]: 1377/2215 cut-off events. [2025-03-17 14:31:57,999 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-03-17 14:31:58,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4361 conditions, 2215 events. 1377/2215 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11962 event pairs, 580 based on Foata normal form. 73/1678 useless extension candidates. Maximal degree in co-relation 4335. Up to 1376 conditions per place. [2025-03-17 14:31:58,008 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2025-03-17 14:31:58,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 268 flow [2025-03-17 14:31:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:31:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:31:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-17 14:31:58,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-03-17 14:31:58,009 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 122 flow. Second operand 3 states and 95 transitions. [2025-03-17 14:31:58,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 268 flow [2025-03-17 14:31:58,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 238 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:31:58,012 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 115 flow [2025-03-17 14:31:58,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2025-03-17 14:31:58,012 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-03-17 14:31:58,012 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 115 flow [2025-03-17 14:31:58,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:58,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:58,012 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:58,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:31:58,013 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:58,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:58,013 INFO L85 PathProgramCache]: Analyzing trace with hash -9630044, now seen corresponding path program 1 times [2025-03-17 14:31:58,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:58,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801211215] [2025-03-17 14:31:58,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:58,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:58,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:31:58,025 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:31:58,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:58,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:58,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:58,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801211215] [2025-03-17 14:31:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801211215] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:58,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999291713] [2025-03-17 14:31:58,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:58,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:58,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:58,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:58,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:58,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:58,270 INFO L124 PetriNetUnfolderBase]: 1548/2425 cut-off events. [2025-03-17 14:31:58,270 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2025-03-17 14:31:58,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5264 conditions, 2425 events. 1548/2425 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12611 event pairs, 1354 based on Foata normal form. 0/1967 useless extension candidates. Maximal degree in co-relation 2019. Up to 2045 conditions per place. [2025-03-17 14:31:58,281 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 50 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2025-03-17 14:31:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 259 flow [2025-03-17 14:31:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2025-03-17 14:31:58,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-03-17 14:31:58,282 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 115 flow. Second operand 4 states and 108 transitions. [2025-03-17 14:31:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 259 flow [2025-03-17 14:31:58,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:58,284 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 121 flow [2025-03-17 14:31:58,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2025-03-17 14:31:58,285 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2025-03-17 14:31:58,285 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 121 flow [2025-03-17 14:31:58,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:58,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:58,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:58,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:31:58,285 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:58,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:58,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1580428250, now seen corresponding path program 1 times [2025-03-17 14:31:58,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:58,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683678327] [2025-03-17 14:31:58,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:58,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:58,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:31:58,297 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:31:58,298 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:58,298 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:58,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683678327] [2025-03-17 14:31:58,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683678327] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:31:58,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943476729] [2025-03-17 14:31:58,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:58,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:31:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:31:58,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:31:58,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:31:58,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:31:58,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:31:58,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:58,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:58,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:31:58,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:31:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:58,621 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:31:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943476729] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:58,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:31:58,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-03-17 14:31:58,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111950466] [2025-03-17 14:31:58,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:58,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:31:58,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:58,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:31:58,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:31:58,632 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:58,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 121 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:58,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:58,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:58,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:58,812 INFO L124 PetriNetUnfolderBase]: 1128/1899 cut-off events. [2025-03-17 14:31:58,812 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2025-03-17 14:31:58,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3998 conditions, 1899 events. 1128/1899 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10026 event pairs, 576 based on Foata normal form. 0/1746 useless extension candidates. Maximal degree in co-relation 3372. Up to 1084 conditions per place. [2025-03-17 14:31:58,820 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 37 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2025-03-17 14:31:58,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 231 flow [2025-03-17 14:31:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:31:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:31:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2025-03-17 14:31:58,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2025-03-17 14:31:58,821 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 121 flow. Second operand 5 states and 114 transitions. [2025-03-17 14:31:58,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 231 flow [2025-03-17 14:31:58,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:58,822 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 124 flow [2025-03-17 14:31:58,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2025-03-17 14:31:58,823 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2025-03-17 14:31:58,823 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 124 flow [2025-03-17 14:31:58,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:58,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:58,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:31:58,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 14:31:59,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 14:31:59,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:59,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1580428251, now seen corresponding path program 1 times [2025-03-17 14:31:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281082635] [2025-03-17 14:31:59,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:31:59,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:31:59,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:59,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:31:59,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281082635] [2025-03-17 14:31:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281082635] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142592248] [2025-03-17 14:31:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:59,067 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:59,074 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 14:31:59,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 14:31:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,162 INFO L124 PetriNetUnfolderBase]: 776/1337 cut-off events. [2025-03-17 14:31:59,163 INFO L125 PetriNetUnfolderBase]: For 513/513 co-relation queries the response was YES. [2025-03-17 14:31:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2991 conditions, 1337 events. 776/1337 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6583 event pairs, 646 based on Foata normal form. 124/1384 useless extension candidates. Maximal degree in co-relation 1488. Up to 1184 conditions per place. [2025-03-17 14:31:59,168 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 28 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2025-03-17 14:31:59,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 178 flow [2025-03-17 14:31:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2025-03-17 14:31:59,169 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.421875 [2025-03-17 14:31:59,169 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 124 flow. Second operand 4 states and 81 transitions. [2025-03-17 14:31:59,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 178 flow [2025-03-17 14:31:59,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:31:59,171 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 106 flow [2025-03-17 14:31:59,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-03-17 14:31:59,172 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2025-03-17 14:31:59,172 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 106 flow [2025-03-17 14:31:59,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,172 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] [2025-03-17 14:31:59,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:31:59,172 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:59,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash 423338339, now seen corresponding path program 1 times [2025-03-17 14:31:59,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851414737] [2025-03-17 14:31:59,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:31:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:31:59,180 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:31:59,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:31:59,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:59,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851414737] [2025-03-17 14:31:59,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851414737] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:59,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157658958] [2025-03-17 14:31:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:59,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:59,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:59,239 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:59,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:59,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,349 INFO L124 PetriNetUnfolderBase]: 621/1052 cut-off events. [2025-03-17 14:31:59,349 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2025-03-17 14:31:59,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 1052 events. 621/1052 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4617 event pairs, 75 based on Foata normal form. 56/1090 useless extension candidates. Maximal degree in co-relation 1739. Up to 636 conditions per place. [2025-03-17 14:31:59,352 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2025-03-17 14:31:59,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 304 flow [2025-03-17 14:31:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-03-17 14:31:59,353 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2025-03-17 14:31:59,353 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 106 flow. Second operand 4 states and 107 transitions. [2025-03-17 14:31:59,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 304 flow [2025-03-17 14:31:59,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 300 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:31:59,355 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 123 flow [2025-03-17 14:31:59,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-03-17 14:31:59,356 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2025-03-17 14:31:59,356 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 123 flow [2025-03-17 14:31:59,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,356 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] [2025-03-17 14:31:59,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 14:31:59,356 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:59,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash -191285297, now seen corresponding path program 2 times [2025-03-17 14:31:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146604869] [2025-03-17 14:31:59,357 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:31:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,362 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 1 equivalence classes. [2025-03-17 14:31:59,368 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:31:59,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:31:59,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:59,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146604869] [2025-03-17 14:31:59,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146604869] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:59,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624065681] [2025-03-17 14:31:59,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:59,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:59,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:59,434 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:59,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:59,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,516 INFO L124 PetriNetUnfolderBase]: 566/937 cut-off events. [2025-03-17 14:31:59,516 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2025-03-17 14:31:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 937 events. 566/937 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3965 event pairs, 112 based on Foata normal form. 28/938 useless extension candidates. Maximal degree in co-relation 1792. Up to 622 conditions per place. [2025-03-17 14:31:59,520 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 44 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2025-03-17 14:31:59,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 280 flow [2025-03-17 14:31:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:31:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:31:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-03-17 14:31:59,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-03-17 14:31:59,522 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 123 flow. Second operand 4 states and 98 transitions. [2025-03-17 14:31:59,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 280 flow [2025-03-17 14:31:59,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:59,523 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 153 flow [2025-03-17 14:31:59,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2025-03-17 14:31:59,524 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2025-03-17 14:31:59,524 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 153 flow [2025-03-17 14:31:59,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,524 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] [2025-03-17 14:31:59,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:31:59,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:59,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -328256541, now seen corresponding path program 3 times [2025-03-17 14:31:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475374460] [2025-03-17 14:31:59,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:31:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,531 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:31:59,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:31:59,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:31:59,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475374460] [2025-03-17 14:31:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475374460] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:31:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620540035] [2025-03-17 14:31:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:31:59,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:31:59,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:31:59,642 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:59,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:59,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:31:59,793 INFO L124 PetriNetUnfolderBase]: 674/1173 cut-off events. [2025-03-17 14:31:59,793 INFO L125 PetriNetUnfolderBase]: For 646/646 co-relation queries the response was YES. [2025-03-17 14:31:59,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 1173 events. 674/1173 cut-off events. For 646/646 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5450 event pairs, 148 based on Foata normal form. 52/1208 useless extension candidates. Maximal degree in co-relation 2288. Up to 612 conditions per place. [2025-03-17 14:31:59,801 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 65 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2025-03-17 14:31:59,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 413 flow [2025-03-17 14:31:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:31:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:31:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-03-17 14:31:59,802 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 14:31:59,802 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 153 flow. Second operand 5 states and 130 transitions. [2025-03-17 14:31:59,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 413 flow [2025-03-17 14:31:59,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:31:59,805 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 171 flow [2025-03-17 14:31:59,805 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2025-03-17 14:31:59,805 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2025-03-17 14:31:59,805 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 171 flow [2025-03-17 14:31:59,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:31:59,806 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] [2025-03-17 14:31:59,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:31:59,806 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:31:59,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:31:59,806 INFO L85 PathProgramCache]: Analyzing trace with hash -994307299, now seen corresponding path program 4 times [2025-03-17 14:31:59,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:31:59,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355919155] [2025-03-17 14:31:59,806 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:31:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:31:59,811 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:31:59,816 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:31:59,816 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:31:59,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:31:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:31:59,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:31:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355919155] [2025-03-17 14:31:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355919155] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:31:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:31:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:31:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427453926] [2025-03-17 14:31:59,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:31:59,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:31:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:31:59,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:31:59,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:31:59,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:31:59,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:31:59,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:31:59,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:31:59,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:00,042 INFO L124 PetriNetUnfolderBase]: 934/1655 cut-off events. [2025-03-17 14:32:00,043 INFO L125 PetriNetUnfolderBase]: For 1348/1360 co-relation queries the response was YES. [2025-03-17 14:32:00,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4264 conditions, 1655 events. 934/1655 cut-off events. For 1348/1360 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8623 event pairs, 276 based on Foata normal form. 70/1654 useless extension candidates. Maximal degree in co-relation 3498. Up to 794 conditions per place. [2025-03-17 14:32:00,049 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 58 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2025-03-17 14:32:00,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 402 flow [2025-03-17 14:32:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2025-03-17 14:32:00,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125 [2025-03-17 14:32:00,050 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 171 flow. Second operand 5 states and 123 transitions. [2025-03-17 14:32:00,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 402 flow [2025-03-17 14:32:00,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 388 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:00,053 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 183 flow [2025-03-17 14:32:00,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2025-03-17 14:32:00,053 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2025-03-17 14:32:00,053 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 183 flow [2025-03-17 14:32:00,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:00,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:00,055 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] [2025-03-17 14:32:00,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:32:00,055 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:00,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash -794015819, now seen corresponding path program 5 times [2025-03-17 14:32:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:00,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983578436] [2025-03-17 14:32:00,056 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:00,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:00,062 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-17 14:32:00,069 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-17 14:32:00,070 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:00,070 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983578436] [2025-03-17 14:32:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983578436] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:32:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365496581] [2025-03-17 14:32:00,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:00,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:32:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:00,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:32:00,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:32:00,202 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:32:00,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:00,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:00,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:32:00,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:00,428 INFO L124 PetriNetUnfolderBase]: 1151/2032 cut-off events. [2025-03-17 14:32:00,428 INFO L125 PetriNetUnfolderBase]: For 1620/1620 co-relation queries the response was YES. [2025-03-17 14:32:00,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 2032 events. 1151/2032 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10479 event pairs, 134 based on Foata normal form. 104/2091 useless extension candidates. Maximal degree in co-relation 4711. Up to 538 conditions per place. [2025-03-17 14:32:00,434 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 64 selfloop transitions, 5 changer transitions 18/95 dead transitions. [2025-03-17 14:32:00,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 549 flow [2025-03-17 14:32:00,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:00,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2025-03-17 14:32:00,435 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2025-03-17 14:32:00,435 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 183 flow. Second operand 6 states and 155 transitions. [2025-03-17 14:32:00,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 549 flow [2025-03-17 14:32:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 95 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:00,438 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 161 flow [2025-03-17 14:32:00,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2025-03-17 14:32:00,439 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2025-03-17 14:32:00,439 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 161 flow [2025-03-17 14:32:00,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:00,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:00,440 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:00,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:32:00,440 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:00,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash 764906036, now seen corresponding path program 1 times [2025-03-17 14:32:00,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:00,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395307902] [2025-03-17 14:32:00,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:00,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:00,446 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:32:00,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:00,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:00,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:00,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395307902] [2025-03-17 14:32:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395307902] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829320229] [2025-03-17 14:32:00,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:00,931 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:00,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:32:00,973 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:32:00,993 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:32:00,994 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:00,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:00,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:32:00,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:01,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-17 14:32:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:01,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:01,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2025-03-17 14:32:01,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:01,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2025-03-17 14:32:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:01,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829320229] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:01,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:01,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2025-03-17 14:32:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458095395] [2025-03-17 14:32:01,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:01,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 14:32:01,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:01,746 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 14:32:01,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2025-03-17 14:32:01,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-17 14:32:01,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 161 flow. Second operand has 29 states, 29 states have (on average 13.448275862068966) internal successors, (390), 29 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:01,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:01,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-17 14:32:01,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:03,654 INFO L124 PetriNetUnfolderBase]: 4968/7727 cut-off events. [2025-03-17 14:32:03,654 INFO L125 PetriNetUnfolderBase]: For 10418/10418 co-relation queries the response was YES. [2025-03-17 14:32:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22881 conditions, 7727 events. 4968/7727 cut-off events. For 10418/10418 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 45057 event pairs, 446 based on Foata normal form. 90/7448 useless extension candidates. Maximal degree in co-relation 12223. Up to 1835 conditions per place. [2025-03-17 14:32:03,682 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 257 selfloop transitions, 76 changer transitions 51/389 dead transitions. [2025-03-17 14:32:03,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 389 transitions, 2392 flow [2025-03-17 14:32:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-17 14:32:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-17 14:32:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 790 transitions. [2025-03-17 14:32:03,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.422008547008547 [2025-03-17 14:32:03,685 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 161 flow. Second operand 39 states and 790 transitions. [2025-03-17 14:32:03,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 389 transitions, 2392 flow [2025-03-17 14:32:03,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 389 transitions, 2155 flow, removed 35 selfloop flow, removed 11 redundant places. [2025-03-17 14:32:03,695 INFO L231 Difference]: Finished difference. Result has 102 places, 127 transitions, 810 flow [2025-03-17 14:32:03,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=810, PETRI_PLACES=102, PETRI_TRANSITIONS=127} [2025-03-17 14:32:03,695 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2025-03-17 14:32:03,695 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 127 transitions, 810 flow [2025-03-17 14:32:03,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.448275862068966) internal successors, (390), 29 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:03,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:03,696 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:03,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:03,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:03,897 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:03,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1313996830, now seen corresponding path program 1 times [2025-03-17 14:32:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:03,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973737056] [2025-03-17 14:32:03,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:03,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:03,903 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:32:03,909 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:32:03,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:03,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:32:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973737056] [2025-03-17 14:32:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973737056] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161181458] [2025-03-17 14:32:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:03,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:32:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:03,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:32:03,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:32:03,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-17 14:32:03,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 127 transitions, 810 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:03,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:03,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-17 14:32:03,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:04,237 INFO L124 PetriNetUnfolderBase]: 2291/3740 cut-off events. [2025-03-17 14:32:04,237 INFO L125 PetriNetUnfolderBase]: For 9552/9552 co-relation queries the response was YES. [2025-03-17 14:32:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13226 conditions, 3740 events. 2291/3740 cut-off events. For 9552/9552 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20129 event pairs, 792 based on Foata normal form. 24/3757 useless extension candidates. Maximal degree in co-relation 11722. Up to 3035 conditions per place. [2025-03-17 14:32:04,262 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 135 selfloop transitions, 3 changer transitions 0/144 dead transitions. [2025-03-17 14:32:04,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1213 flow [2025-03-17 14:32:04,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:32:04,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:32:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2025-03-17 14:32:04,264 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-03-17 14:32:04,264 INFO L175 Difference]: Start difference. First operand has 102 places, 127 transitions, 810 flow. Second operand 3 states and 78 transitions. [2025-03-17 14:32:04,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1213 flow [2025-03-17 14:32:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1047 flow, removed 55 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:04,297 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 657 flow [2025-03-17 14:32:04,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=657, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2025-03-17 14:32:04,298 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2025-03-17 14:32:04,298 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 657 flow [2025-03-17 14:32:04,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:04,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:04,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:04,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-17 14:32:04,299 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:04,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1135674505, now seen corresponding path program 2 times [2025-03-17 14:32:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:04,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147507143] [2025-03-17 14:32:04,301 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:04,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-17 14:32:04,320 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:32:04,320 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:04,320 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:32:04,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:04,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147507143] [2025-03-17 14:32:04,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147507143] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:04,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:04,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411878080] [2025-03-17 14:32:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:04,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:04,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:04,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:04,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:32:04,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 657 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:04,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:04,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:32:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:04,734 INFO L124 PetriNetUnfolderBase]: 2871/5100 cut-off events. [2025-03-17 14:32:04,734 INFO L125 PetriNetUnfolderBase]: For 14190/14240 co-relation queries the response was YES. [2025-03-17 14:32:04,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 5100 events. 2871/5100 cut-off events. For 14190/14240 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 31057 event pairs, 822 based on Foata normal form. 188/5233 useless extension candidates. Maximal degree in co-relation 10589. Up to 2265 conditions per place. [2025-03-17 14:32:04,756 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 136 selfloop transitions, 41 changer transitions 0/197 dead transitions. [2025-03-17 14:32:04,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 197 transitions, 1435 flow [2025-03-17 14:32:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-03-17 14:32:04,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-03-17 14:32:04,757 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 657 flow. Second operand 4 states and 116 transitions. [2025-03-17 14:32:04,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 197 transitions, 1435 flow [2025-03-17 14:32:04,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 197 transitions, 1432 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:04,776 INFO L231 Difference]: Finished difference. Result has 103 places, 159 transitions, 1110 flow [2025-03-17 14:32:04,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=103, PETRI_TRANSITIONS=159} [2025-03-17 14:32:04,776 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2025-03-17 14:32:04,776 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 159 transitions, 1110 flow [2025-03-17 14:32:04,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:04,776 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:04,776 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:04,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:32:04,777 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:04,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash -471704494, now seen corresponding path program 3 times [2025-03-17 14:32:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537682379] [2025-03-17 14:32:04,777 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:04,783 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-03-17 14:32:04,791 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 38 statements. [2025-03-17 14:32:04,792 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:04,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-17 14:32:04,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:04,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537682379] [2025-03-17 14:32:04,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537682379] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:04,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:04,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:32:04,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604249208] [2025-03-17 14:32:04,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:04,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:32:04,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:04,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:32:04,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:32:04,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:32:04,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 159 transitions, 1110 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:04,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:04,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:32:04,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:05,639 INFO L124 PetriNetUnfolderBase]: 4233/7427 cut-off events. [2025-03-17 14:32:05,639 INFO L125 PetriNetUnfolderBase]: For 29635/29723 co-relation queries the response was YES. [2025-03-17 14:32:05,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28382 conditions, 7427 events. 4233/7427 cut-off events. For 29635/29723 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 47463 event pairs, 324 based on Foata normal form. 248/7592 useless extension candidates. Maximal degree in co-relation 14990. Up to 1631 conditions per place. [2025-03-17 14:32:05,671 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 216 selfloop transitions, 39 changer transitions 50/325 dead transitions. [2025-03-17 14:32:05,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 325 transitions, 3073 flow [2025-03-17 14:32:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:32:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:32:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2025-03-17 14:32:05,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2025-03-17 14:32:05,675 INFO L175 Difference]: Start difference. First operand has 103 places, 159 transitions, 1110 flow. Second operand 9 states and 214 transitions. [2025-03-17 14:32:05,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 325 transitions, 3073 flow [2025-03-17 14:32:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 325 transitions, 2981 flow, removed 46 selfloop flow, removed 0 redundant places. [2025-03-17 14:32:05,718 INFO L231 Difference]: Finished difference. Result has 113 places, 168 transitions, 1313 flow [2025-03-17 14:32:05,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1313, PETRI_PLACES=113, PETRI_TRANSITIONS=168} [2025-03-17 14:32:05,719 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2025-03-17 14:32:05,719 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 168 transitions, 1313 flow [2025-03-17 14:32:05,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:05,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:05,720 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:05,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:32:05,720 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:05,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1843922445, now seen corresponding path program 4 times [2025-03-17 14:32:05,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:05,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479859372] [2025-03-17 14:32:05,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:05,727 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 14:32:05,740 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:32:05,740 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:05,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:05,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479859372] [2025-03-17 14:32:05,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479859372] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:05,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714990774] [2025-03-17 14:32:05,825 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:32:05,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:05,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:05,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:05,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:32:05,868 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 40 statements into 2 equivalence classes. [2025-03-17 14:32:05,889 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:32:05,889 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:32:05,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:05,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:32:05,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:05,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714990774] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:06,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:32:06,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856711718] [2025-03-17 14:32:06,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:06,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:32:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:06,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:32:06,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:06,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-03-17 14:32:06,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 168 transitions, 1313 flow. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:06,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-03-17 14:32:06,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:06,515 INFO L124 PetriNetUnfolderBase]: 2472/4520 cut-off events. [2025-03-17 14:32:06,515 INFO L125 PetriNetUnfolderBase]: For 20236/20244 co-relation queries the response was YES. [2025-03-17 14:32:06,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17951 conditions, 4520 events. 2472/4520 cut-off events. For 20236/20244 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 26778 event pairs, 1313 based on Foata normal form. 56/4528 useless extension candidates. Maximal degree in co-relation 16729. Up to 3140 conditions per place. [2025-03-17 14:32:06,536 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 93 selfloop transitions, 7 changer transitions 46/159 dead transitions. [2025-03-17 14:32:06,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 159 transitions, 1511 flow [2025-03-17 14:32:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:32:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:32:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2025-03-17 14:32:06,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2025-03-17 14:32:06,537 INFO L175 Difference]: Start difference. First operand has 113 places, 168 transitions, 1313 flow. Second operand 7 states and 152 transitions. [2025-03-17 14:32:06,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 159 transitions, 1511 flow [2025-03-17 14:32:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1432 flow, removed 21 selfloop flow, removed 9 redundant places. [2025-03-17 14:32:06,563 INFO L231 Difference]: Finished difference. Result has 104 places, 113 transitions, 871 flow [2025-03-17 14:32:06,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=871, PETRI_PLACES=104, PETRI_TRANSITIONS=113} [2025-03-17 14:32:06,563 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2025-03-17 14:32:06,563 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 113 transitions, 871 flow [2025-03-17 14:32:06,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:06,564 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:06,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:32:06,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:32:06,764 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:06,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1536396103, now seen corresponding path program 5 times [2025-03-17 14:32:06,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:06,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99232308] [2025-03-17 14:32:06,765 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:32:06,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:06,772 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 42 statements into 4 equivalence classes. [2025-03-17 14:32:06,786 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:32:06,786 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-17 14:32:06,786 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-17 14:32:06,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:06,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99232308] [2025-03-17 14:32:06,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99232308] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:06,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:06,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:32:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753829553] [2025-03-17 14:32:06,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:06,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:06,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:06,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:06,873 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-17 14:32:06,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 871 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:06,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:06,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-17 14:32:06,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:07,547 INFO L124 PetriNetUnfolderBase]: 4428/7182 cut-off events. [2025-03-17 14:32:07,548 INFO L125 PetriNetUnfolderBase]: For 19612/19612 co-relation queries the response was YES. [2025-03-17 14:32:07,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26169 conditions, 7182 events. 4428/7182 cut-off events. For 19612/19612 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 39555 event pairs, 1018 based on Foata normal form. 416/7595 useless extension candidates. Maximal degree in co-relation 22293. Up to 3559 conditions per place. [2025-03-17 14:32:07,578 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 141 selfloop transitions, 4 changer transitions 0/150 dead transitions. [2025-03-17 14:32:07,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 150 transitions, 1444 flow [2025-03-17 14:32:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-03-17 14:32:07,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2025-03-17 14:32:07,578 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 871 flow. Second operand 4 states and 95 transitions. [2025-03-17 14:32:07,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 150 transitions, 1444 flow [2025-03-17 14:32:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1418 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:07,601 INFO L231 Difference]: Finished difference. Result has 91 places, 112 transitions, 858 flow [2025-03-17 14:32:07,601 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=858, PETRI_PLACES=91, PETRI_TRANSITIONS=112} [2025-03-17 14:32:07,601 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2025-03-17 14:32:07,601 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 112 transitions, 858 flow [2025-03-17 14:32:07,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:07,602 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:07,602 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:07,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:32:07,602 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:07,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1839028621, now seen corresponding path program 1 times [2025-03-17 14:32:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:07,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323638815] [2025-03-17 14:32:07,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:07,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:32:07,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:32:07,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:07,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323638815] [2025-03-17 14:32:08,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323638815] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:08,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386924053] [2025-03-17 14:32:08,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:08,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:08,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:08,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:32:08,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:32:08,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:32:08,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:08,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:08,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-03-17 14:32:08,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:08,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:09,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:09,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-03-17 14:32:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386924053] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:09,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2025-03-17 14:32:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878245042] [2025-03-17 14:32:09,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:09,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-17 14:32:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:09,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-17 14:32:09,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 14:32:09,703 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-17 14:32:09,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 112 transitions, 858 flow. Second operand has 41 states, 41 states have (on average 13.536585365853659) internal successors, (555), 41 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:09,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:09,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-17 14:32:09,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:14,265 INFO L124 PetriNetUnfolderBase]: 11869/19176 cut-off events. [2025-03-17 14:32:14,265 INFO L125 PetriNetUnfolderBase]: For 57611/57611 co-relation queries the response was YES. [2025-03-17 14:32:14,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71435 conditions, 19176 events. 11869/19176 cut-off events. For 57611/57611 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 123755 event pairs, 877 based on Foata normal form. 564/19739 useless extension candidates. Maximal degree in co-relation 37764. Up to 3173 conditions per place. [2025-03-17 14:32:14,376 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 528 selfloop transitions, 245 changer transitions 98/876 dead transitions. [2025-03-17 14:32:14,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 876 transitions, 7041 flow [2025-03-17 14:32:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2025-03-17 14:32:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2025-03-17 14:32:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1656 transitions. [2025-03-17 14:32:14,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2025-03-17 14:32:14,379 INFO L175 Difference]: Start difference. First operand has 91 places, 112 transitions, 858 flow. Second operand 88 states and 1656 transitions. [2025-03-17 14:32:14,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 876 transitions, 7041 flow [2025-03-17 14:32:14,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 876 transitions, 6969 flow, removed 34 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:14,413 INFO L231 Difference]: Finished difference. Result has 204 places, 311 transitions, 3416 flow [2025-03-17 14:32:14,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=3416, PETRI_PLACES=204, PETRI_TRANSITIONS=311} [2025-03-17 14:32:14,414 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2025-03-17 14:32:14,414 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 311 transitions, 3416 flow [2025-03-17 14:32:14,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 13.536585365853659) internal successors, (555), 41 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:14,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:14,414 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:14,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:14,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:14,615 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:14,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1632359663, now seen corresponding path program 2 times [2025-03-17 14:32:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:14,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94167801] [2025-03-17 14:32:14,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:14,620 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:32:14,639 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:32:14,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:14,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:15,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94167801] [2025-03-17 14:32:15,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94167801] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:15,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673179181] [2025-03-17 14:32:15,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:15,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:15,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:15,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:15,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:32:15,280 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:32:15,302 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:32:15,302 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:15,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:15,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-17 14:32:15,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:15,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 14:32:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:15,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:16,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-03-17 14:32:16,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:16,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 200 [2025-03-17 14:32:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:17,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673179181] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:17,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:17,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2025-03-17 14:32:17,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003956279] [2025-03-17 14:32:17,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:17,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-03-17 14:32:17,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:17,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-03-17 14:32:17,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 14:32:17,103 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2025-03-17 14:32:17,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 311 transitions, 3416 flow. Second operand has 37 states, 37 states have (on average 12.81081081081081) internal successors, (474), 37 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:17,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:17,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2025-03-17 14:32:17,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:37,016 INFO L124 PetriNetUnfolderBase]: 76881/116009 cut-off events. [2025-03-17 14:32:37,016 INFO L125 PetriNetUnfolderBase]: For 1070692/1070692 co-relation queries the response was YES. [2025-03-17 14:32:37,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536829 conditions, 116009 events. 76881/116009 cut-off events. For 1070692/1070692 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 825918 event pairs, 7530 based on Foata normal form. 4184/120192 useless extension candidates. Maximal degree in co-relation 457130. Up to 16847 conditions per place. [2025-03-17 14:32:37,881 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 1476 selfloop transitions, 986 changer transitions 1098/3564 dead transitions. [2025-03-17 14:32:37,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 3564 transitions, 42293 flow [2025-03-17 14:32:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2025-03-17 14:32:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2025-03-17 14:32:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 3333 transitions. [2025-03-17 14:32:37,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4157934131736527 [2025-03-17 14:32:37,887 INFO L175 Difference]: Start difference. First operand has 204 places, 311 transitions, 3416 flow. Second operand 167 states and 3333 transitions. [2025-03-17 14:32:37,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 3564 transitions, 42293 flow [2025-03-17 14:32:42,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 3564 transitions, 38672 flow, removed 1755 selfloop flow, removed 12 redundant places. [2025-03-17 14:32:42,093 INFO L231 Difference]: Finished difference. Result has 468 places, 1203 transitions, 16869 flow [2025-03-17 14:32:42,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=167, PETRI_FLOW=16869, PETRI_PLACES=468, PETRI_TRANSITIONS=1203} [2025-03-17 14:32:42,094 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 418 predicate places. [2025-03-17 14:32:42,094 INFO L471 AbstractCegarLoop]: Abstraction has has 468 places, 1203 transitions, 16869 flow [2025-03-17 14:32:42,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 12.81081081081081) internal successors, (474), 37 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:42,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:42,094 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:42,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:42,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:42,296 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:32:42,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:42,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1130267483, now seen corresponding path program 3 times [2025-03-17 14:32:42,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:42,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477330942] [2025-03-17 14:32:42,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:42,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 5 equivalence classes. [2025-03-17 14:32:42,312 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 39 of 44 statements. [2025-03-17 14:32:42,312 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:42,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:42,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:42,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477330942] [2025-03-17 14:32:42,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477330942] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:42,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198709827] [2025-03-17 14:32:42,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:32:42,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:42,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:32:42,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:32:42,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 44 statements into 5 equivalence classes. [2025-03-17 14:32:42,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 39 of 44 statements. [2025-03-17 14:32:42,619 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:32:42,619 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:42,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 14:32:42,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:42,834 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:43,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:32:43,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2025-03-17 14:32:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-03-17 14:32:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198709827] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:43,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2025-03-17 14:32:43,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118588659] [2025-03-17 14:32:43,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:43,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:32:43,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:43,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:32:43,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:32:43,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 14:32:43,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1203 transitions, 16869 flow. Second operand has 24 states, 24 states have (on average 16.416666666666668) internal successors, (394), 24 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:43,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:43,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 14:32:43,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:58,619 INFO L124 PetriNetUnfolderBase]: 30900/52620 cut-off events. [2025-03-17 14:32:58,619 INFO L125 PetriNetUnfolderBase]: For 7257522/7258328 co-relation queries the response was YES. [2025-03-17 14:32:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585370 conditions, 52620 events. 30900/52620 cut-off events. For 7257522/7258328 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 412895 event pairs, 3594 based on Foata normal form. 784/53113 useless extension candidates. Maximal degree in co-relation 583366. Up to 12578 conditions per place. [2025-03-17 14:32:59,886 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 1092 selfloop transitions, 274 changer transitions 119/1676 dead transitions. [2025-03-17 14:32:59,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 1676 transitions, 27939 flow [2025-03-17 14:32:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-17 14:32:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-17 14:32:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 482 transitions. [2025-03-17 14:32:59,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4564393939393939 [2025-03-17 14:32:59,887 INFO L175 Difference]: Start difference. First operand has 468 places, 1203 transitions, 16869 flow. Second operand 22 states and 482 transitions. [2025-03-17 14:32:59,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 1676 transitions, 27939 flow [2025-03-17 14:33:23,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1676 transitions, 23171 flow, removed 2250 selfloop flow, removed 27 redundant places. [2025-03-17 14:33:23,872 INFO L231 Difference]: Finished difference. Result has 466 places, 1328 transitions, 15943 flow [2025-03-17 14:33:23,873 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=12967, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=15943, PETRI_PLACES=466, PETRI_TRANSITIONS=1328} [2025-03-17 14:33:23,873 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 416 predicate places. [2025-03-17 14:33:23,873 INFO L471 AbstractCegarLoop]: Abstraction has has 466 places, 1328 transitions, 15943 flow [2025-03-17 14:33:23,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 16.416666666666668) internal successors, (394), 24 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:33:23,873 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:23,873 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2025-03-17 14:33:23,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:33:24,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:24,074 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:33:24,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:24,075 INFO L85 PathProgramCache]: Analyzing trace with hash 848506502, now seen corresponding path program 4 times [2025-03-17 14:33:24,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:24,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557954107] [2025-03-17 14:33:24,075 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:24,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:24,080 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-03-17 14:33:24,091 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:33:24,092 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:33:24,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:33:24,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557954107] [2025-03-17 14:33:24,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557954107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:24,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683733214] [2025-03-17 14:33:24,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:33:24,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:24,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:24,171 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:24,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:33:24,220 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes.