./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:26:45,814 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:26:45,864 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:26:45,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:26:45,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:26:45,881 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:26:45,882 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:26:45,882 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:26:45,882 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:26:45,882 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:26:45,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:26:45,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:26:45,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:26:45,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:26:45,883 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:26:45,884 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:26:45,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:26:45,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:26:45,885 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-03-17 14:26:46,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:26:46,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:26:46,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:26:46,113 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:26:46,113 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:26:46,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 14:26:47,280 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0bb4a5c/0197dd31008f4a63be46ca8b89ace559/FLAG367839bd7 [2025-03-17 14:26:47,598 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:26:47,599 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 14:26:47,607 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0bb4a5c/0197dd31008f4a63be46ca8b89ace559/FLAG367839bd7 [2025-03-17 14:26:47,867 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc0bb4a5c/0197dd31008f4a63be46ca8b89ace559 [2025-03-17 14:26:47,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:26:47,869 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:26:47,870 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:26:47,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:26:47,874 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:26:47,875 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:26:47" (1/1) ... [2025-03-17 14:26:47,876 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ceab9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:47, skipping insertion in model container [2025-03-17 14:26:47,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:26:47" (1/1) ... [2025-03-17 14:26:47,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:26:48,024 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 14:26:48,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:26:48,045 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:26:48,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:26:48,090 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:26:48,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48 WrapperNode [2025-03-17 14:26:48,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:26:48,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:26:48,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:26:48,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:26:48,096 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,120 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 291 [2025-03-17 14:26:48,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:26:48,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:26:48,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:26:48,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:26:48,126 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,126 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,128 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,146 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 14:26:48,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,157 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,157 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,159 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:26:48,162 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:26:48,162 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:26:48,162 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:26:48,162 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (1/1) ... [2025-03-17 14:26:48,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:26:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:48,184 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 14:26:48,186 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 14:26:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:26:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:26:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:26:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 14:26:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:26:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:26:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:26:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:26:48,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:26:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:26:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:26:48,206 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 14:26:48,298 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:26:48,300 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:26:48,651 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:26:48,651 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:26:48,887 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:26:48,887 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:26:48,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:26:48 BoogieIcfgContainer [2025-03-17 14:26:48,887 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:26:48,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:26:48,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:26:48,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:26:48,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:26:47" (1/3) ... [2025-03-17 14:26:48,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57338a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:26:48, skipping insertion in model container [2025-03-17 14:26:48,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:26:48" (2/3) ... [2025-03-17 14:26:48,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57338a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:26:48, skipping insertion in model container [2025-03-17 14:26:48,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:26:48" (3/3) ... [2025-03-17 14:26:48,897 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-03-17 14:26:48,908 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:26:48,909 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 6 loop locations, and 14 error locations. [2025-03-17 14:26:48,909 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:26:48,965 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:26:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2025-03-17 14:26:49,021 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2025-03-17 14:26:49,023 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 14:26:49,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 130 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2025-03-17 14:26:49,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2025-03-17 14:26:49,031 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2025-03-17 14:26:49,038 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:26:49,046 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;@2e9ef8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:26:49,046 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2025-03-17 14:26:49,049 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:26:49,049 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:26:49,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:26:49,049 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:49,050 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:26:49,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:49,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 790757, now seen corresponding path program 1 times [2025-03-17 14:26:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:49,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194552114] [2025-03-17 14:26:49,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:49,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:49,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:26:49,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:26:49,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:49,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:49,265 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 14:26:49,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:49,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194552114] [2025-03-17 14:26:49,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194552114] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:49,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:49,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:26:49,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235550321] [2025-03-17 14:26:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:49,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:26:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:49,292 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:26:49,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:26:49,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:49,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 14:26:49,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:49,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:49,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:50,586 INFO L124 PetriNetUnfolderBase]: 11253/15061 cut-off events. [2025-03-17 14:26:50,587 INFO L125 PetriNetUnfolderBase]: For 374/374 co-relation queries the response was YES. [2025-03-17 14:26:50,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30470 conditions, 15061 events. 11253/15061 cut-off events. For 374/374 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84478 event pairs, 9160 based on Foata normal form. 1/10396 useless extension candidates. Maximal degree in co-relation 28212. Up to 14621 conditions per place. [2025-03-17 14:26:50,694 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2025-03-17 14:26:50,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 222 flow [2025-03-17 14:26:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:26:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:26:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-17 14:26:50,705 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2025-03-17 14:26:50,706 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 95 transitions. [2025-03-17 14:26:50,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 222 flow [2025-03-17 14:26:50,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 14:26:50,783 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2025-03-17 14:26:50,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-17 14:26:50,788 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2025-03-17 14:26:50,790 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2025-03-17 14:26:50,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 14:26:50,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:50,790 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:26:50,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:26:50,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:50,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:50,792 INFO L85 PathProgramCache]: Analyzing trace with hash 790758, now seen corresponding path program 1 times [2025-03-17 14:26:50,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:50,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477092215] [2025-03-17 14:26:50,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:50,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:50,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:26:50,826 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:26:50,826 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:50,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:51,029 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 14:26:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:51,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477092215] [2025-03-17 14:26:51,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477092215] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:51,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:51,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:26:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419937060] [2025-03-17 14:26:51,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:51,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:26:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:51,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:26:51,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:26:51,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:51,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:51,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:51,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:52,073 INFO L124 PetriNetUnfolderBase]: 11254/15064 cut-off events. [2025-03-17 14:26:52,073 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-03-17 14:26:52,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29959 conditions, 15064 events. 11254/15064 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84648 event pairs, 9160 based on Foata normal form. 0/10396 useless extension candidates. Maximal degree in co-relation 29930. Up to 14630 conditions per place. [2025-03-17 14:26:52,166 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 45 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2025-03-17 14:26:52,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 226 flow [2025-03-17 14:26:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:26:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:26:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-17 14:26:52,170 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2025-03-17 14:26:52,170 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 114 transitions. [2025-03-17 14:26:52,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 226 flow [2025-03-17 14:26:52,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:26:52,173 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 145 flow [2025-03-17 14:26:52,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2025-03-17 14:26:52,174 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -7 predicate places. [2025-03-17 14:26:52,174 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 145 flow [2025-03-17 14:26:52,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:26:52,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:52,175 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:26:52,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:26:52,175 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:52,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash 24514558, now seen corresponding path program 1 times [2025-03-17 14:26:52,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:52,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332285471] [2025-03-17 14:26:52,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:52,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:52,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:26:52,206 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:26:52,206 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:52,206 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:52,429 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 14:26:52,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:52,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332285471] [2025-03-17 14:26:52,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332285471] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:52,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:52,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:26:52,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571813915] [2025-03-17 14:26:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:52,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:26:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:52,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:26:52,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:26:52,455 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:52,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:26:52,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:52,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:52,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:53,279 INFO L124 PetriNetUnfolderBase]: 11255/15067 cut-off events. [2025-03-17 14:26:53,280 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-03-17 14:26:53,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29976 conditions, 15067 events. 11255/15067 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84705 event pairs, 9160 based on Foata normal form. 0/10398 useless extension candidates. Maximal degree in co-relation 29951. Up to 14629 conditions per place. [2025-03-17 14:26:53,344 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-03-17 14:26:53,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 255 flow [2025-03-17 14:26:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:26:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:26:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2025-03-17 14:26:53,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.415625 [2025-03-17 14:26:53,348 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 145 flow. Second operand 5 states and 133 transitions. [2025-03-17 14:26:53,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 255 flow [2025-03-17 14:26:53,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:26:53,350 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 179 flow [2025-03-17 14:26:53,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2025-03-17 14:26:53,352 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2025-03-17 14:26:53,352 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 179 flow [2025-03-17 14:26:53,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:26:53,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:53,352 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:26:53,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:26:53,352 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:53,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 759943279, now seen corresponding path program 1 times [2025-03-17 14:26:53,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:53,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545167537] [2025-03-17 14:26:53,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:53,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:26:53,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:26:53,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:53,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:53,558 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 14:26:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:53,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545167537] [2025-03-17 14:26:53,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545167537] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:53,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909398979] [2025-03-17 14:26:53,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:53,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:53,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:53,562 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 14:26:53,564 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 14:26:53,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:26:53,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:26:53,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:53,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:53,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:26:53,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:53,679 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 14:26:53,825 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 14:26:53,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:53,909 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 14:26:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909398979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:53,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:26:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140577292] [2025-03-17 14:26:53,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:53,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:26:53,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:53,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:26:53,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:26:53,954 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:53,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 179 flow. Second operand has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 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 14:26:53,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:53,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:53,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:55,096 INFO L124 PetriNetUnfolderBase]: 11256/15069 cut-off events. [2025-03-17 14:26:55,096 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-03-17 14:26:55,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29999 conditions, 15069 events. 11256/15069 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84635 event pairs, 9160 based on Foata normal form. 0/10403 useless extension candidates. Maximal degree in co-relation 29961. Up to 14630 conditions per place. [2025-03-17 14:26:55,165 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2025-03-17 14:26:55,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 298 flow [2025-03-17 14:26:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:26:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:26:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2025-03-17 14:26:55,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.353515625 [2025-03-17 14:26:55,167 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 179 flow. Second operand 8 states and 181 transitions. [2025-03-17 14:26:55,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 298 flow [2025-03-17 14:26:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:26:55,168 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 209 flow [2025-03-17 14:26:55,168 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-03-17 14:26:55,169 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-03-17 14:26:55,169 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 209 flow [2025-03-17 14:26:55,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.363636363636363) internal successors, (191), 11 states have internal predecessors, (191), 0 states have call successors, (0), 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 14:26:55,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:55,169 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 14:26:55,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 14:26:55,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:55,371 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:55,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2083678192, now seen corresponding path program 1 times [2025-03-17 14:26:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333367867] [2025-03-17 14:26:55,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:55,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:26:55,392 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:26:55,392 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:55,392 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:55,563 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 14:26:55,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333367867] [2025-03-17 14:26:55,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333367867] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135879341] [2025-03-17 14:26:55,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:55,566 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 14:26:55,570 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 14:26:55,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:26:55,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:26:55,633 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:55,633 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:55,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:26:55,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:55,661 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 14:26:55,800 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 14:26:55,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:55,923 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 14:26:55,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135879341] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:55,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:55,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-17 14:26:55,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775407006] [2025-03-17 14:26:55,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:55,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:26:55,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:55,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:26:55,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:26:55,990 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:55,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 209 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 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 14:26:55,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:55,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:55,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:57,231 INFO L124 PetriNetUnfolderBase]: 11257/15071 cut-off events. [2025-03-17 14:26:57,231 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-03-17 14:26:57,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30015 conditions, 15071 events. 11257/15071 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 84695 event pairs, 9160 based on Foata normal form. 0/10405 useless extension candidates. Maximal degree in co-relation 29969. Up to 14622 conditions per place. [2025-03-17 14:26:57,279 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 38 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2025-03-17 14:26:57,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 65 transitions, 329 flow [2025-03-17 14:26:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:26:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:26:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2025-03-17 14:26:57,280 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3506944444444444 [2025-03-17 14:26:57,280 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 209 flow. Second operand 9 states and 202 transitions. [2025-03-17 14:26:57,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 65 transitions, 329 flow [2025-03-17 14:26:57,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-17 14:26:57,282 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 206 flow [2025-03-17 14:26:57,282 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2025-03-17 14:26:57,282 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-03-17 14:26:57,282 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 206 flow [2025-03-17 14:26:57,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 0 states have call successors, (0), 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 14:26:57,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:57,283 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:57,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:26:57,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:57,487 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:57,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1077739648, now seen corresponding path program 1 times [2025-03-17 14:26:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100625401] [2025-03-17 14:26:57,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:57,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:26:57,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:26:57,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:57,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:57,556 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 14:26:57,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:57,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100625401] [2025-03-17 14:26:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100625401] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:57,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:57,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:26:57,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634015273] [2025-03-17 14:26:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:57,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:26:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:57,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:26:57,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:26:57,561 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:26:57,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 14:26:57,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:57,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:26:57,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:58,536 INFO L124 PetriNetUnfolderBase]: 13736/18598 cut-off events. [2025-03-17 14:26:58,537 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2025-03-17 14:26:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37047 conditions, 18598 events. 13736/18598 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 109071 event pairs, 11357 based on Foata normal form. 541/14019 useless extension candidates. Maximal degree in co-relation 29954. Up to 14636 conditions per place. [2025-03-17 14:26:58,604 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 89 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2025-03-17 14:26:58,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 516 flow [2025-03-17 14:26:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:26:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:26:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2025-03-17 14:26:58,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55625 [2025-03-17 14:26:58,605 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 206 flow. Second operand 5 states and 178 transitions. [2025-03-17 14:26:58,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 516 flow [2025-03-17 14:26:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 463 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-03-17 14:26:58,607 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 212 flow [2025-03-17 14:26:58,607 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2025-03-17 14:26:58,608 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-03-17 14:26:58,608 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 212 flow [2025-03-17 14:26:58,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 14:26:58,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:58,608 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:58,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:26:58,608 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:58,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1506053783, now seen corresponding path program 1 times [2025-03-17 14:26:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463741112] [2025-03-17 14:26:58,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:58,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:58,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:26:58,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:26:58,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:58,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:26:58,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:58,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463741112] [2025-03-17 14:26:58,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463741112] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:58,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:58,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:26:58,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811913432] [2025-03-17 14:26:58,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:58,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:26:58,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:58,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:26:58,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:26:58,714 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:58,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:26:58,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:58,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:58,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:59,368 INFO L124 PetriNetUnfolderBase]: 10422/14172 cut-off events. [2025-03-17 14:26:59,369 INFO L125 PetriNetUnfolderBase]: For 936/936 co-relation queries the response was YES. [2025-03-17 14:26:59,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30029 conditions, 14172 events. 10422/14172 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 80563 event pairs, 8512 based on Foata normal form. 0/10801 useless extension candidates. Maximal degree in co-relation 22976. Up to 13740 conditions per place. [2025-03-17 14:26:59,409 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 48 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2025-03-17 14:26:59,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 316 flow [2025-03-17 14:26:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:26:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:26:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2025-03-17 14:26:59,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-03-17 14:26:59,410 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 212 flow. Second operand 5 states and 124 transitions. [2025-03-17 14:26:59,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 316 flow [2025-03-17 14:26:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:26:59,413 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 215 flow [2025-03-17 14:26:59,413 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2025-03-17 14:26:59,414 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-03-17 14:26:59,414 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 215 flow [2025-03-17 14:26:59,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:26:59,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:59,414 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:59,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:26:59,414 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:26:59,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1506053784, now seen corresponding path program 1 times [2025-03-17 14:26:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047040477] [2025-03-17 14:26:59,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:59,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:26:59,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:26:59,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:59,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:59,586 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 14:26:59,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:59,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047040477] [2025-03-17 14:26:59,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047040477] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:59,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689452265] [2025-03-17 14:26:59,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:26:59,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:59,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:59,589 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 14:26:59,591 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 14:26:59,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:26:59,652 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:26:59,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:26:59,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:59,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-17 14:26:59,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:59,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:26:59,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:26:59,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-17 14:26:59,710 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:26:59,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:26:59,734 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 14:26:59,734 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:26:59,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689452265] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:59,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:26:59,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-03-17 14:26:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479706055] [2025-03-17 14:26:59,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:59,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:26:59,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:59,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:26:59,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:26:59,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:26:59,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 215 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 14:26:59,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:59,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:26:59,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:00,189 INFO L124 PetriNetUnfolderBase]: 7684/10514 cut-off events. [2025-03-17 14:27:00,189 INFO L125 PetriNetUnfolderBase]: For 767/767 co-relation queries the response was YES. [2025-03-17 14:27:00,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21704 conditions, 10514 events. 7684/10514 cut-off events. For 767/767 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 57871 event pairs, 6191 based on Foata normal form. 0/8767 useless extension candidates. Maximal degree in co-relation 14596. Up to 10205 conditions per place. [2025-03-17 14:27:00,232 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 50 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2025-03-17 14:27:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 315 flow [2025-03-17 14:27:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2025-03-17 14:27:00,233 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4140625 [2025-03-17 14:27:00,233 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 215 flow. Second operand 4 states and 106 transitions. [2025-03-17 14:27:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 315 flow [2025-03-17 14:27:00,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 63 transitions, 303 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:27:00,236 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 203 flow [2025-03-17 14:27:00,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=203, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2025-03-17 14:27:00,236 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2025-03-17 14:27:00,236 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 203 flow [2025-03-17 14:27:00,237 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 14:27:00,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:00,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:00,242 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 14:27:00,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:00,437 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:00,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 49232663, now seen corresponding path program 1 times [2025-03-17 14:27:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:00,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019881073] [2025-03-17 14:27:00,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:00,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:00,443 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:27:00,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:27:00,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:00,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:00,497 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 14:27:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019881073] [2025-03-17 14:27:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019881073] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:00,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:00,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846516987] [2025-03-17 14:27:00,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:00,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:27:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:00,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:27:00,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:27:00,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:00,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 14:27:00,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:00,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:01,255 INFO L124 PetriNetUnfolderBase]: 9465/13199 cut-off events. [2025-03-17 14:27:01,256 INFO L125 PetriNetUnfolderBase]: For 998/998 co-relation queries the response was YES. [2025-03-17 14:27:01,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27239 conditions, 13199 events. 9465/13199 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76728 event pairs, 7762 based on Foata normal form. 333/11971 useless extension candidates. Maximal degree in co-relation 18394. Up to 10206 conditions per place. [2025-03-17 14:27:01,317 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 72 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2025-03-17 14:27:01,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 423 flow [2025-03-17 14:27:01,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-03-17 14:27:01,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703125 [2025-03-17 14:27:01,318 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 203 flow. Second operand 4 states and 146 transitions. [2025-03-17 14:27:01,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 423 flow [2025-03-17 14:27:01,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:01,321 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 226 flow [2025-03-17 14:27:01,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2025-03-17 14:27:01,322 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-03-17 14:27:01,322 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 226 flow [2025-03-17 14:27:01,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 14:27:01,322 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:01,322 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:01,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:27:01,322 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:01,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1066248823, now seen corresponding path program 1 times [2025-03-17 14:27:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510533585] [2025-03-17 14:27:01,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:01,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:27:01,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:27:01,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:01,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:01,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510533585] [2025-03-17 14:27:01,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510533585] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:01,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182248653] [2025-03-17 14:27:01,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:01,487 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 14:27:01,488 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 14:27:01,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:27:01,553 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:27:01,553 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:01,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:01,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:27:01,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:01,622 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 14:27:01,622 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:27:01,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182248653] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:01,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:27:01,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2025-03-17 14:27:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336106706] [2025-03-17 14:27:01,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:01,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:27:01,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:01,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:27:01,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:27:01,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:01,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:01,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:01,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:01,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:02,319 INFO L124 PetriNetUnfolderBase]: 7273/10257 cut-off events. [2025-03-17 14:27:02,320 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2025-03-17 14:27:02,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22460 conditions, 10257 events. 7273/10257 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58794 event pairs, 5890 based on Foata normal form. 0/9370 useless extension candidates. Maximal degree in co-relation 15096. Up to 9831 conditions per place. [2025-03-17 14:27:02,375 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 45 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2025-03-17 14:27:02,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 322 flow [2025-03-17 14:27:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-03-17 14:27:02,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-03-17 14:27:02,376 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 226 flow. Second operand 4 states and 112 transitions. [2025-03-17 14:27:02,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 61 transitions, 322 flow [2025-03-17 14:27:02,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 61 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:27:02,379 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 227 flow [2025-03-17 14:27:02,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2025-03-17 14:27:02,380 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2025-03-17 14:27:02,380 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 227 flow [2025-03-17 14:27:02,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:02,380 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:02,380 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:02,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 14:27:02,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:02,584 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:02,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1066248824, now seen corresponding path program 1 times [2025-03-17 14:27:02,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:02,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093012217] [2025-03-17 14:27:02,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:02,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:02,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:27:02,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:27:02,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:02,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:02,623 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 14:27:02,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:02,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093012217] [2025-03-17 14:27:02,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093012217] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:02,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:02,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:02,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713991196] [2025-03-17 14:27:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:02,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:27:02,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:02,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:27:02,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:27:02,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2025-03-17 14:27:02,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 227 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 14:27:02,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:02,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2025-03-17 14:27:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:03,161 INFO L124 PetriNetUnfolderBase]: 5447/7795 cut-off events. [2025-03-17 14:27:03,161 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2025-03-17 14:27:03,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16632 conditions, 7795 events. 5447/7795 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43534 event pairs, 4350 based on Foata normal form. 0/7591 useless extension candidates. Maximal degree in co-relation 11185. Up to 7419 conditions per place. [2025-03-17 14:27:03,192 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2025-03-17 14:27:03,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 319 flow [2025-03-17 14:27:03,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2025-03-17 14:27:03,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3984375 [2025-03-17 14:27:03,193 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 227 flow. Second operand 4 states and 102 transitions. [2025-03-17 14:27:03,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 59 transitions, 319 flow [2025-03-17 14:27:03,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:03,195 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 219 flow [2025-03-17 14:27:03,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2025-03-17 14:27:03,195 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2025-03-17 14:27:03,196 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 219 flow [2025-03-17 14:27:03,196 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 14:27:03,196 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:03,196 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] [2025-03-17 14:27:03,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:27:03,196 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:03,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash 873736508, now seen corresponding path program 1 times [2025-03-17 14:27:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:03,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413810783] [2025-03-17 14:27:03,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:03,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:27:03,209 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:27:03,209 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:03,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:03,343 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 14:27:03,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:03,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413810783] [2025-03-17 14:27:03,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413810783] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:03,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:03,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:27:03,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824462216] [2025-03-17 14:27:03,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:03,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:27:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:03,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:27:03,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:27:03,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:03,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:03,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:03,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:03,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:03,964 INFO L124 PetriNetUnfolderBase]: 5494/8307 cut-off events. [2025-03-17 14:27:03,964 INFO L125 PetriNetUnfolderBase]: For 1363/1363 co-relation queries the response was YES. [2025-03-17 14:27:03,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17487 conditions, 8307 events. 5494/8307 cut-off events. For 1363/1363 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 50148 event pairs, 743 based on Foata normal form. 484/8734 useless extension candidates. Maximal degree in co-relation 14251. Up to 4096 conditions per place. [2025-03-17 14:27:03,997 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 80 selfloop transitions, 6 changer transitions 3/98 dead transitions. [2025-03-17 14:27:03,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 495 flow [2025-03-17 14:27:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:27:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:27:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2025-03-17 14:27:03,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.51875 [2025-03-17 14:27:03,999 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 219 flow. Second operand 5 states and 166 transitions. [2025-03-17 14:27:03,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 495 flow [2025-03-17 14:27:04,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:04,001 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 206 flow [2025-03-17 14:27:04,001 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2025-03-17 14:27:04,002 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2025-03-17 14:27:04,002 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 206 flow [2025-03-17 14:27:04,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:04,002 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:04,002 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, 1, 1] [2025-03-17 14:27:04,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-17 14:27:04,002 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:04,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1583927632, now seen corresponding path program 1 times [2025-03-17 14:27:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298467667] [2025-03-17 14:27:04,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:04,009 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:27:04,016 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:27:04,017 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:04,017 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:27:04,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:04,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298467667] [2025-03-17 14:27:04,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298467667] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:04,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:04,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:27:04,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725352939] [2025-03-17 14:27:04,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:04,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:27:04,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:04,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:27:04,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:27:04,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:04,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 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 14:27:04,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:04,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:04,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:04,585 INFO L124 PetriNetUnfolderBase]: 5526/7951 cut-off events. [2025-03-17 14:27:04,585 INFO L125 PetriNetUnfolderBase]: For 3488/3488 co-relation queries the response was YES. [2025-03-17 14:27:04,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18699 conditions, 7951 events. 5526/7951 cut-off events. For 3488/3488 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43528 event pairs, 698 based on Foata normal form. 352/8285 useless extension candidates. Maximal degree in co-relation 18660. Up to 4128 conditions per place. [2025-03-17 14:27:04,613 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 89 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2025-03-17 14:27:04,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 535 flow [2025-03-17 14:27:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:27:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:27:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2025-03-17 14:27:04,614 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-03-17 14:27:04,614 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 206 flow. Second operand 6 states and 196 transitions. [2025-03-17 14:27:04,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 535 flow [2025-03-17 14:27:04,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 519 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-17 14:27:04,617 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 235 flow [2025-03-17 14:27:04,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2025-03-17 14:27:04,617 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2025-03-17 14:27:04,617 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 235 flow [2025-03-17 14:27:04,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 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 14:27:04,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:04,617 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, 1, 1] [2025-03-17 14:27:04,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-17 14:27:04,617 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:04,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1349486482, now seen corresponding path program 2 times [2025-03-17 14:27:04,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:04,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046872332] [2025-03-17 14:27:04,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:04,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:04,625 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:27:04,639 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:27:04,639 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:27:04,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:27:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:04,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046872332] [2025-03-17 14:27:04,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046872332] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:04,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442800608] [2025-03-17 14:27:04,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:04,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:04,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:04,737 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 14:27:04,738 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 14:27:04,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:27:04,815 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:27:04,815 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:27:04,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:04,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:27:04,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:27:04,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:27:04,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442800608] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:04,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:27:04,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2025-03-17 14:27:04,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216573170] [2025-03-17 14:27:04,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:04,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:27:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:04,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:27:04,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:27:04,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-03-17 14:27:04,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:04,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:04,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-03-17 14:27:04,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:05,808 INFO L124 PetriNetUnfolderBase]: 11466/15766 cut-off events. [2025-03-17 14:27:05,809 INFO L125 PetriNetUnfolderBase]: For 9064/9064 co-relation queries the response was YES. [2025-03-17 14:27:05,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40246 conditions, 15766 events. 11466/15766 cut-off events. For 9064/9064 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 87131 event pairs, 1337 based on Foata normal form. 224/15952 useless extension candidates. Maximal degree in co-relation 40205. Up to 5119 conditions per place. [2025-03-17 14:27:05,899 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 101 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2025-03-17 14:27:05,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 123 transitions, 655 flow [2025-03-17 14:27:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:27:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:27:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 202 transitions. [2025-03-17 14:27:05,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2025-03-17 14:27:05,901 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 235 flow. Second operand 6 states and 202 transitions. [2025-03-17 14:27:05,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 123 transitions, 655 flow [2025-03-17 14:27:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 123 transitions, 645 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:05,910 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 326 flow [2025-03-17 14:27:05,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2025-03-17 14:27:05,910 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2025-03-17 14:27:05,910 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 326 flow [2025-03-17 14:27:05,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:27:05,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:05,910 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, 1, 1, 1, 1, 1] [2025-03-17 14:27:05,917 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 14:27:06,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:27:06,111 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:06,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 537344593, now seen corresponding path program 1 times [2025-03-17 14:27:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:06,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507222916] [2025-03-17 14:27:06,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:06,118 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:27:06,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:27:06,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:06,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:27:06,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507222916] [2025-03-17 14:27:06,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507222916] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:06,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130599660] [2025-03-17 14:27:06,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:06,663 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 14:27:06,664 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 14:27:06,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 14:27:06,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 14:27:06,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:06,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:06,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:27:06,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:06,778 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 14:27:06,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-03-17 14:27:06,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2025-03-17 14:27:07,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 14:27:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:27:07,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:07,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2025-03-17 14:27:07,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2025-03-17 14:27:07,455 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 39 treesize of output 35 [2025-03-17 14:27:07,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2025-03-17 14:27:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:27:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130599660] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:27:07,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:27:07,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2025-03-17 14:27:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750654464] [2025-03-17 14:27:07,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:27:07,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:27:07,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:07,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:27:07,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:27:07,633 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:07,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 326 flow. Second operand has 19 states, 19 states have (on average 22.105263157894736) internal successors, (420), 19 states have internal predecessors, (420), 0 states have call successors, (0), 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 14:27:07,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:07,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:07,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:10,945 INFO L124 PetriNetUnfolderBase]: 28148/41231 cut-off events. [2025-03-17 14:27:10,945 INFO L125 PetriNetUnfolderBase]: For 65084/65455 co-relation queries the response was YES. [2025-03-17 14:27:11,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123078 conditions, 41231 events. 28148/41231 cut-off events. For 65084/65455 co-relation queries the response was YES. Maximal size of possible extension queue 1776. Compared 293823 event pairs, 2836 based on Foata normal form. 196/41417 useless extension candidates. Maximal degree in co-relation 63620. Up to 14080 conditions per place. [2025-03-17 14:27:11,486 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 245 selfloop transitions, 55 changer transitions 76/387 dead transitions. [2025-03-17 14:27:11,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 387 transitions, 2441 flow [2025-03-17 14:27:11,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 14:27:11,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-17 14:27:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 751 transitions. [2025-03-17 14:27:11,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5101902173913043 [2025-03-17 14:27:11,488 INFO L175 Difference]: Start difference. First operand has 79 places, 68 transitions, 326 flow. Second operand 23 states and 751 transitions. [2025-03-17 14:27:11,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 387 transitions, 2441 flow [2025-03-17 14:27:11,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 387 transitions, 2375 flow, removed 18 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:11,553 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 927 flow [2025-03-17 14:27:11,553 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=927, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2025-03-17 14:27:11,553 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2025-03-17 14:27:11,553 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 927 flow [2025-03-17 14:27:11,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.105263157894736) internal successors, (420), 19 states have internal predecessors, (420), 0 states have call successors, (0), 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 14:27:11,553 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:11,553 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, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:11,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:27:11,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 14:27:11,754 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:11,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:11,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1983237600, now seen corresponding path program 1 times [2025-03-17 14:27:11,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:11,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108604273] [2025-03-17 14:27:11,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:11,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:11,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:27:11,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:27:11,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:11,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:27:12,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:12,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108604273] [2025-03-17 14:27:12,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108604273] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:12,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130472848] [2025-03-17 14:27:12,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:12,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:12,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:27:12,256 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 14:27:12,258 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 14:27:12,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-03-17 14:27:12,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-03-17 14:27:12,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:12,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:12,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:27:12,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:27:12,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2025-03-17 14:27:12,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2025-03-17 14:27:12,490 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 23 treesize of output 7 [2025-03-17 14:27:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:27:12,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:27:12,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:27:12,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2025-03-17 14:27:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 14:27:12,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130472848] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:27:12,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:27:12,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 15 [2025-03-17 14:27:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538214747] [2025-03-17 14:27:12,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:12,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:27:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:12,628 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:27:12,628 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:27:12,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:12,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 927 flow. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 14:27:12,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:12,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:12,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:16,091 INFO L124 PetriNetUnfolderBase]: 32643/47325 cut-off events. [2025-03-17 14:27:16,092 INFO L125 PetriNetUnfolderBase]: For 119263/119467 co-relation queries the response was YES. [2025-03-17 14:27:16,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149708 conditions, 47325 events. 32643/47325 cut-off events. For 119263/119467 co-relation queries the response was YES. Maximal size of possible extension queue 1912. Compared 334120 event pairs, 3140 based on Foata normal form. 210/47467 useless extension candidates. Maximal degree in co-relation 149661. Up to 17197 conditions per place. [2025-03-17 14:27:16,454 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 132 selfloop transitions, 39 changer transitions 1/183 dead transitions. [2025-03-17 14:27:16,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1592 flow [2025-03-17 14:27:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:27:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:27:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2025-03-17 14:27:16,455 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-03-17 14:27:16,455 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 927 flow. Second operand 6 states and 200 transitions. [2025-03-17 14:27:16,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1592 flow [2025-03-17 14:27:17,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 183 transitions, 1519 flow, removed 34 selfloop flow, removed 4 redundant places. [2025-03-17 14:27:17,774 INFO L231 Difference]: Finished difference. Result has 107 places, 130 transitions, 1123 flow [2025-03-17 14:27:17,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1123, PETRI_PLACES=107, PETRI_TRANSITIONS=130} [2025-03-17 14:27:17,774 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 41 predicate places. [2025-03-17 14:27:17,774 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 130 transitions, 1123 flow [2025-03-17 14:27:17,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 14:27:17,774 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:17,774 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:17,782 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 14:27:17,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:27:17,978 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:17,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1910780256, now seen corresponding path program 1 times [2025-03-17 14:27:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858740469] [2025-03-17 14:27:17,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:17,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:27:17,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:27:17,997 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:17,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:27:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858740469] [2025-03-17 14:27:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858740469] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:18,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:18,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:27:18,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959603346] [2025-03-17 14:27:18,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:18,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:27:18,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:18,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:27:18,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:27:18,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:18,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 130 transitions, 1123 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 14:27:18,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:18,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:18,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:22,708 INFO L124 PetriNetUnfolderBase]: 38628/56017 cut-off events. [2025-03-17 14:27:22,708 INFO L125 PetriNetUnfolderBase]: For 158117/159009 co-relation queries the response was YES. [2025-03-17 14:27:23,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176559 conditions, 56017 events. 38628/56017 cut-off events. For 158117/159009 co-relation queries the response was YES. Maximal size of possible extension queue 2057. Compared 401459 event pairs, 18621 based on Foata normal form. 1012/56950 useless extension candidates. Maximal degree in co-relation 151897. Up to 29437 conditions per place. [2025-03-17 14:27:23,242 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 153 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2025-03-17 14:27:23,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 1776 flow [2025-03-17 14:27:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:27:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:27:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2025-03-17 14:27:23,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2025-03-17 14:27:23,243 INFO L175 Difference]: Start difference. First operand has 107 places, 130 transitions, 1123 flow. Second operand 3 states and 113 transitions. [2025-03-17 14:27:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 1776 flow [2025-03-17 14:27:24,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1739 flow, removed 14 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:24,218 INFO L231 Difference]: Finished difference. Result has 108 places, 131 transitions, 1145 flow [2025-03-17 14:27:24,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1145, PETRI_PLACES=108, PETRI_TRANSITIONS=131} [2025-03-17 14:27:24,218 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2025-03-17 14:27:24,218 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 131 transitions, 1145 flow [2025-03-17 14:27:24,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 14:27:24,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:24,219 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:24,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-03-17 14:27:24,219 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:24,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash 507564913, now seen corresponding path program 2 times [2025-03-17 14:27:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:24,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63600178] [2025-03-17 14:27:24,220 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:27:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:24,226 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:27:24,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:27:24,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:27:24,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:27:24,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63600178] [2025-03-17 14:27:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63600178] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:24,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:24,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:27:24,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325320155] [2025-03-17 14:27:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:24,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:27:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:24,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:27:24,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:27:24,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2025-03-17 14:27:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 131 transitions, 1145 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 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 14:27:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2025-03-17 14:27:24,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:27:32,650 INFO L124 PetriNetUnfolderBase]: 66944/97411 cut-off events. [2025-03-17 14:27:32,650 INFO L125 PetriNetUnfolderBase]: For 237953/238781 co-relation queries the response was YES. [2025-03-17 14:27:33,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309703 conditions, 97411 events. 66944/97411 cut-off events. For 237953/238781 co-relation queries the response was YES. Maximal size of possible extension queue 3275. Compared 747765 event pairs, 12139 based on Foata normal form. 1042/98363 useless extension candidates. Maximal degree in co-relation 284518. Up to 44768 conditions per place. [2025-03-17 14:27:33,534 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 144 selfloop transitions, 40 changer transitions 0/195 dead transitions. [2025-03-17 14:27:33,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 195 transitions, 1841 flow [2025-03-17 14:27:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:27:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:27:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 162 transitions. [2025-03-17 14:27:33,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6328125 [2025-03-17 14:27:33,535 INFO L175 Difference]: Start difference. First operand has 108 places, 131 transitions, 1145 flow. Second operand 4 states and 162 transitions. [2025-03-17 14:27:33,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 195 transitions, 1841 flow [2025-03-17 14:27:35,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 195 transitions, 1820 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-17 14:27:35,794 INFO L231 Difference]: Finished difference. Result has 111 places, 134 transitions, 1337 flow [2025-03-17 14:27:35,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1337, PETRI_PLACES=111, PETRI_TRANSITIONS=134} [2025-03-17 14:27:35,795 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 45 predicate places. [2025-03-17 14:27:35,795 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 134 transitions, 1337 flow [2025-03-17 14:27:35,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 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 14:27:35,795 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:27:35,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:27:35,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:27:35,795 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2025-03-17 14:27:35,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:27:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash 327541609, now seen corresponding path program 1 times [2025-03-17 14:27:35,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:27:35,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728499157] [2025-03-17 14:27:35,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:27:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:27:35,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 14:27:35,820 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 14:27:35,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:27:35,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:27:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:27:36,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:27:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728499157] [2025-03-17 14:27:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728499157] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:27:36,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:27:36,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:27:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595650834] [2025-03-17 14:27:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:27:36,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:27:36,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:27:36,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:27:36,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:27:36,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2025-03-17 14:27:36,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 134 transitions, 1337 flow. Second operand has 9 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 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 14:27:36,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:27:36,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2025-03-17 14:27:36,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand