./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-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-more-array-sum-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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:28:43,900 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:28:43,947 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:28:43,950 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:28:43,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:28:43,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:28:43,969 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:28:43,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:28:43,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:28:43,970 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:28:43,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:28:43,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:28:43,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:28:43,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:28:43,971 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:28:43,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:28:43,971 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:28:43,972 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:28:43,972 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:28:43,973 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:28:43,973 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:28:43,974 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:28:43,974 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:28:43,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:28:43,974 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:28:43,974 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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2025-03-17 14:28:44,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:28:44,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:28:44,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:28:44,199 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:28:44,199 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:28:44,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-17 14:28:45,304 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a4e6231d/84f477861a01424b98e89ef811ca4c36/FLAGcfb1ff626 [2025-03-17 14:28:45,477 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:28:45,484 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-17 14:28:45,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a4e6231d/84f477861a01424b98e89ef811ca4c36/FLAGcfb1ff626 [2025-03-17 14:28:45,863 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a4e6231d/84f477861a01424b98e89ef811ca4c36 [2025-03-17 14:28:45,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:28:45,866 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:28:45,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:28:45,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:28:45,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:28:45,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:28:45" (1/1) ... [2025-03-17 14:28:45,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a075b4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:45, skipping insertion in model container [2025-03-17 14:28:45,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:28:45" (1/1) ... [2025-03-17 14:28:45,884 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:28:46,006 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 14:28:46,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:28:46,014 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:28:46,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:28:46,040 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:28:46,041 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46 WrapperNode [2025-03-17 14:28:46,041 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:28:46,042 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:28:46,042 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:28:46,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:28:46,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,075 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 172 [2025-03-17 14:28:46,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:28:46,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:28:46,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:28:46,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:28:46,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,087 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,102 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:28:46,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,106 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:28:46,114 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:28:46,114 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:28:46,114 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:28:46,115 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (1/1) ... [2025-03-17 14:28:46,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:28:46,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:46,138 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 14:28:46,143 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 14:28:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:28:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:28:46,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:28:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:28:46,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:28:46,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:28:46,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:28:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:28:46,158 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 14:28:46,235 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:28:46,236 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:28:46,520 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:28:46,520 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:28:46,774 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:28:46,774 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:28:46,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:28:46 BoogieIcfgContainer [2025-03-17 14:28:46,775 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:28:46,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:28:46,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:28:46,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:28:46,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:28:45" (1/3) ... [2025-03-17 14:28:46,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd0a233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:28:46, skipping insertion in model container [2025-03-17 14:28:46,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:28:46" (2/3) ... [2025-03-17 14:28:46,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd0a233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:28:46, skipping insertion in model container [2025-03-17 14:28:46,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:28:46" (3/3) ... [2025-03-17 14:28:46,783 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2025-03-17 14:28:46,794 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:28:46,796 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 41 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2025-03-17 14:28:46,796 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:28:46,851 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:28:46,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2025-03-17 14:28:46,903 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2025-03-17 14:28:46,908 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:28:46,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2025-03-17 14:28:46,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2025-03-17 14:28:46,912 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2025-03-17 14:28:46,925 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:28:46,935 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;@545b2c46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:28:46,936 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-03-17 14:28:46,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:28:46,940 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:28:46,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:28:46,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:46,941 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:28:46,941 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:46,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:46,945 INFO L85 PathProgramCache]: Analyzing trace with hash 518273, now seen corresponding path program 1 times [2025-03-17 14:28:46,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:46,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466515761] [2025-03-17 14:28:46,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:46,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:47,018 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:28:47,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:28:47,034 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:47,034 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:47,124 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 14:28:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466515761] [2025-03-17 14:28:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466515761] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:47,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:47,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:28:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120791302] [2025-03-17 14:28:47,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:47,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:28:47,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:47,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:28:47,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:28:47,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:47,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:47,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:47,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:47,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:47,488 INFO L124 PetriNetUnfolderBase]: 1316/1960 cut-off events. [2025-03-17 14:28:47,488 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2025-03-17 14:28:47,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3973 conditions, 1960 events. 1316/1960 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10078 event pairs, 1060 based on Foata normal form. 1/1443 useless extension candidates. Maximal degree in co-relation 3667. Up to 1877 conditions per place. [2025-03-17 14:28:47,502 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-03-17 14:28:47,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2025-03-17 14:28:47,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:28:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:28:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2025-03-17 14:28:47,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2025-03-17 14:28:47,515 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2025-03-17 14:28:47,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2025-03-17 14:28:47,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:28:47,523 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2025-03-17 14:28:47,525 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-03-17 14:28:47,529 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2025-03-17 14:28:47,530 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2025-03-17 14:28:47,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:47,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:47,530 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:28:47,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:28:47,531 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:47,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 518274, now seen corresponding path program 1 times [2025-03-17 14:28:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899804419] [2025-03-17 14:28:47,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:47,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:28:47,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:28:47,566 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:47,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:47,776 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 14:28:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:47,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899804419] [2025-03-17 14:28:47,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899804419] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:47,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:47,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:28:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503657360] [2025-03-17 14:28:47,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:47,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:28:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:47,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:28:47,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:28:47,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:47,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:47,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:47,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:47,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:48,032 INFO L124 PetriNetUnfolderBase]: 1317/1963 cut-off events. [2025-03-17 14:28:48,032 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-17 14:28:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3895 conditions, 1963 events. 1317/1963 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10133 event pairs, 1060 based on Foata normal form. 0/1445 useless extension candidates. Maximal degree in co-relation 3873. Up to 1882 conditions per place. [2025-03-17 14:28:48,040 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-03-17 14:28:48,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2025-03-17 14:28:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:28:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:28:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-03-17 14:28:48,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2025-03-17 14:28:48,042 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2025-03-17 14:28:48,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2025-03-17 14:28:48,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:28:48,043 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2025-03-17 14:28:48,044 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-03-17 14:28:48,044 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-03-17 14:28:48,044 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2025-03-17 14:28:48,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:48,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:48,044 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:28:48,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:28:48,045 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:48,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 498077946, now seen corresponding path program 1 times [2025-03-17 14:28:48,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:48,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129886795] [2025-03-17 14:28:48,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:48,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:48,051 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:28:48,057 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:28:48,057 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:48,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:48,244 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 14:28:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:48,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129886795] [2025-03-17 14:28:48,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129886795] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:48,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790763611] [2025-03-17 14:28:48,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:48,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:48,248 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 14:28:48,250 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 14:28:48,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:28:48,306 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:28:48,306 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:48,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:48,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:28:48,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:48,352 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 14:28:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:28:48,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:48,636 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 14:28:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790763611] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:48,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:48,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:28:48,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197320900] [2025-03-17 14:28:48,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:48,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:28:48,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:48,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:28:48,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:28:48,672 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:48,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:48,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:48,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:48,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:49,017 INFO L124 PetriNetUnfolderBase]: 1317/1962 cut-off events. [2025-03-17 14:28:49,018 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-17 14:28:49,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3902 conditions, 1962 events. 1317/1962 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10096 event pairs, 1060 based on Foata normal form. 0/1444 useless extension candidates. Maximal degree in co-relation 3880. Up to 1878 conditions per place. [2025-03-17 14:28:49,025 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2025-03-17 14:28:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2025-03-17 14:28:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:28:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:28:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2025-03-17 14:28:49,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2025-03-17 14:28:49,027 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2025-03-17 14:28:49,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2025-03-17 14:28:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:28:49,029 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2025-03-17 14:28:49,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2025-03-17 14:28:49,030 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2025-03-17 14:28:49,030 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2025-03-17 14:28:49,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:49,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:49,030 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:28:49,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:49,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:49,231 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:49,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1737205814, now seen corresponding path program 1 times [2025-03-17 14:28:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771466724] [2025-03-17 14:28:49,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:49,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:28:49,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:28:49,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:49,239 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:49,288 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 14:28:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771466724] [2025-03-17 14:28:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771466724] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:49,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:49,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:28:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767305908] [2025-03-17 14:28:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:49,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:28:49,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:49,289 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:28:49,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:28:49,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:49,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:49,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:49,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:49,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:49,403 INFO L124 PetriNetUnfolderBase]: 793/1197 cut-off events. [2025-03-17 14:28:49,403 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-03-17 14:28:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2388 conditions, 1197 events. 793/1197 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5475 event pairs, 608 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 2362. Up to 1135 conditions per place. [2025-03-17 14:28:49,409 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2025-03-17 14:28:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 172 flow [2025-03-17 14:28:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:28:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:28:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2025-03-17 14:28:49,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2025-03-17 14:28:49,412 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 4 states and 68 transitions. [2025-03-17 14:28:49,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 172 flow [2025-03-17 14:28:49,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-17 14:28:49,414 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2025-03-17 14:28:49,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2025-03-17 14:28:49,414 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2025-03-17 14:28:49,414 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2025-03-17 14:28:49,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:49,414 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:49,414 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:28:49,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:28:49,415 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:49,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:49,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1737205813, now seen corresponding path program 1 times [2025-03-17 14:28:49,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716253962] [2025-03-17 14:28:49,415 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:49,419 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:28:49,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:28:49,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:49,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:49,462 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 14:28:49,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:49,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716253962] [2025-03-17 14:28:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716253962] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:49,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:49,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:28:49,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859919732] [2025-03-17 14:28:49,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:49,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:28:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:49,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:28:49,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:28:49,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:49,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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 14:28:49,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:49,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:49,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:49,660 INFO L124 PetriNetUnfolderBase]: 1374/2092 cut-off events. [2025-03-17 14:28:49,660 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-03-17 14:28:49,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4156 conditions, 2092 events. 1374/2092 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10284 event pairs, 908 based on Foata normal form. 0/1746 useless extension candidates. Maximal degree in co-relation 2788. Up to 1347 conditions per place. [2025-03-17 14:28:49,669 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2025-03-17 14:28:49,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 306 flow [2025-03-17 14:28:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:28:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:28:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2025-03-17 14:28:49,670 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-03-17 14:28:49,670 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 5 states and 116 transitions. [2025-03-17 14:28:49,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 306 flow [2025-03-17 14:28:49,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:28:49,671 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 105 flow [2025-03-17 14:28:49,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2025-03-17 14:28:49,672 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2025-03-17 14:28:49,672 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 105 flow [2025-03-17 14:28:49,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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 14:28:49,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:49,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:49,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 14:28:49,672 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:49,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1260431038, now seen corresponding path program 1 times [2025-03-17 14:28:49,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:49,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009015958] [2025-03-17 14:28:49,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:49,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:28:49,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:28:49,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:49,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:49,733 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 14:28:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009015958] [2025-03-17 14:28:49,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009015958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:49,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:49,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:28:49,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831284112] [2025-03-17 14:28:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:49,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:28:49,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:49,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:28:49,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:28:49,742 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:49,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 14:28:49,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:49,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:49,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:49,907 INFO L124 PetriNetUnfolderBase]: 1171/1796 cut-off events. [2025-03-17 14:28:49,908 INFO L125 PetriNetUnfolderBase]: For 405/476 co-relation queries the response was YES. [2025-03-17 14:28:49,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 1796 events. 1171/1796 cut-off events. For 405/476 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8383 event pairs, 848 based on Foata normal form. 0/1501 useless extension candidates. Maximal degree in co-relation 2962. Up to 1358 conditions per place. [2025-03-17 14:28:49,915 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 58 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2025-03-17 14:28:49,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 66 transitions, 303 flow [2025-03-17 14:28:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:28:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:28:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2025-03-17 14:28:49,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2025-03-17 14:28:49,917 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 105 flow. Second operand 5 states and 109 transitions. [2025-03-17 14:28:49,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 66 transitions, 303 flow [2025-03-17 14:28:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 66 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:28:49,918 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 125 flow [2025-03-17 14:28:49,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2025-03-17 14:28:49,919 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2025-03-17 14:28:49,919 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 125 flow [2025-03-17 14:28:49,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 14:28:49,919 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:49,919 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:49,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:28:49,920 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:49,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash -869155757, now seen corresponding path program 1 times [2025-03-17 14:28:49,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:49,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892628081] [2025-03-17 14:28:49,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:49,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:49,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:28:49,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:28:49,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:49,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:50,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:50,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892628081] [2025-03-17 14:28:50,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892628081] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367033160] [2025-03-17 14:28:50,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:50,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:50,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:50,040 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 14:28:50,043 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 14:28:50,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:28:50,094 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:28:50,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:50,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:50,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:28:50,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:50,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:50,196 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 22 treesize of output 18 [2025-03-17 14:28:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367033160] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-17 14:28:50,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228543114] [2025-03-17 14:28:50,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:50,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:28:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:50,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:28:50,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:28:50,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2025-03-17 14:28:50,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 125 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 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 14:28:50,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:50,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2025-03-17 14:28:50,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:50,579 INFO L124 PetriNetUnfolderBase]: 1372/2094 cut-off events. [2025-03-17 14:28:50,580 INFO L125 PetriNetUnfolderBase]: For 782/935 co-relation queries the response was YES. [2025-03-17 14:28:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4877 conditions, 2094 events. 1372/2094 cut-off events. For 782/935 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10282 event pairs, 583 based on Foata normal form. 0/1839 useless extension candidates. Maximal degree in co-relation 3789. Up to 987 conditions per place. [2025-03-17 14:28:50,588 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 75 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2025-03-17 14:28:50,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 409 flow [2025-03-17 14:28:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:28:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:28:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2025-03-17 14:28:50,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5032467532467533 [2025-03-17 14:28:50,589 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 125 flow. Second operand 7 states and 155 transitions. [2025-03-17 14:28:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 409 flow [2025-03-17 14:28:50,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 88 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:28:50,591 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 161 flow [2025-03-17 14:28:50,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2025-03-17 14:28:50,591 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2025-03-17 14:28:50,591 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 161 flow [2025-03-17 14:28:50,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 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 14:28:50,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:50,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:50,601 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 14:28:50,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-17 14:28:50,795 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:50,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2062087866, now seen corresponding path program 1 times [2025-03-17 14:28:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:50,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950769347] [2025-03-17 14:28:50,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:50,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:50,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:28:50,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:28:50,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:50,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950769347] [2025-03-17 14:28:50,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950769347] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:50,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640213651] [2025-03-17 14:28:50,918 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:50,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:50,920 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 14:28:50,922 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 14:28:50,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:28:50,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:28:50,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:50,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:50,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 14:28:50,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:50,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:28:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:51,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:51,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640213651] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:51,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:28:51,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2025-03-17 14:28:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355244475] [2025-03-17 14:28:51,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:51,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:28:51,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:51,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:28:51,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:28:51,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2025-03-17 14:28:51,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 161 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 14:28:51,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:51,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2025-03-17 14:28:51,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:51,382 INFO L124 PetriNetUnfolderBase]: 1686/2566 cut-off events. [2025-03-17 14:28:51,383 INFO L125 PetriNetUnfolderBase]: For 2741/2955 co-relation queries the response was YES. [2025-03-17 14:28:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6829 conditions, 2566 events. 1686/2566 cut-off events. For 2741/2955 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12452 event pairs, 812 based on Foata normal form. 0/2359 useless extension candidates. Maximal degree in co-relation 5730. Up to 1300 conditions per place. [2025-03-17 14:28:51,395 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 65 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2025-03-17 14:28:51,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 415 flow [2025-03-17 14:28:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:28:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:28:51,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2025-03-17 14:28:51,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2025-03-17 14:28:51,396 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 161 flow. Second operand 6 states and 128 transitions. [2025-03-17 14:28:51,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 415 flow [2025-03-17 14:28:51,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 401 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-17 14:28:51,400 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 186 flow [2025-03-17 14:28:51,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2025-03-17 14:28:51,401 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2025-03-17 14:28:51,401 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 186 flow [2025-03-17 14:28:51,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 14:28:51,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:51,401 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:51,407 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 14:28:51,601 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 14:28:51,602 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:51,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:51,602 INFO L85 PathProgramCache]: Analyzing trace with hash 72764731, now seen corresponding path program 1 times [2025-03-17 14:28:51,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:51,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128325538] [2025-03-17 14:28:51,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:51,607 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:28:51,611 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:28:51,611 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:51,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:51,654 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 14:28:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:51,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128325538] [2025-03-17 14:28:51,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128325538] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:51,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:51,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:28:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487304113] [2025-03-17 14:28:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:51,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:28:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:51,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:28:51,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:28:51,679 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:51,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:51,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:51,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:51,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:51,906 INFO L124 PetriNetUnfolderBase]: 1836/2644 cut-off events. [2025-03-17 14:28:51,907 INFO L125 PetriNetUnfolderBase]: For 5195/5508 co-relation queries the response was YES. [2025-03-17 14:28:51,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8214 conditions, 2644 events. 1836/2644 cut-off events. For 5195/5508 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11692 event pairs, 1325 based on Foata normal form. 0/2457 useless extension candidates. Maximal degree in co-relation 7549. Up to 2362 conditions per place. [2025-03-17 14:28:51,916 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 56 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-03-17 14:28:51,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 64 transitions, 368 flow [2025-03-17 14:28:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:28:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:28:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2025-03-17 14:28:51,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2025-03-17 14:28:51,917 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 186 flow. Second operand 5 states and 102 transitions. [2025-03-17 14:28:51,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 64 transitions, 368 flow [2025-03-17 14:28:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 64 transitions, 354 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-17 14:28:51,921 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 199 flow [2025-03-17 14:28:51,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-03-17 14:28:51,921 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2025-03-17 14:28:51,921 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 199 flow [2025-03-17 14:28:51,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:51,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:51,921 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:51,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 14:28:51,921 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:51,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1339204875, now seen corresponding path program 1 times [2025-03-17 14:28:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:51,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178575682] [2025-03-17 14:28:51,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:51,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:28:51,929 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:28:51,929 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:51,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:51,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178575682] [2025-03-17 14:28:51,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178575682] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:51,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007958870] [2025-03-17 14:28:51,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:51,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:51,994 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 14:28:51,995 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 14:28:52,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:28:52,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:28:52,039 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:52,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:52,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:28:52,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:52,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007958870] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:52,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:52,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-17 14:28:52,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298296482] [2025-03-17 14:28:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:52,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:28:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:52,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:28:52,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:28:52,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:52,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:52,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:52,616 INFO L124 PetriNetUnfolderBase]: 3161/4632 cut-off events. [2025-03-17 14:28:52,616 INFO L125 PetriNetUnfolderBase]: For 6436/6799 co-relation queries the response was YES. [2025-03-17 14:28:52,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 4632 events. 3161/4632 cut-off events. For 6436/6799 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23332 event pairs, 1711 based on Foata normal form. 74/4508 useless extension candidates. Maximal degree in co-relation 13789. Up to 2544 conditions per place. [2025-03-17 14:28:52,639 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 100 selfloop transitions, 13 changer transitions 0/116 dead transitions. [2025-03-17 14:28:52,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 116 transitions, 704 flow [2025-03-17 14:28:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:28:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:28:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2025-03-17 14:28:52,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2025-03-17 14:28:52,640 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 199 flow. Second operand 8 states and 165 transitions. [2025-03-17 14:28:52,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 116 transitions, 704 flow [2025-03-17 14:28:52,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 116 transitions, 699 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:28:52,646 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 292 flow [2025-03-17 14:28:52,646 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2025-03-17 14:28:52,646 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2025-03-17 14:28:52,647 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 292 flow [2025-03-17 14:28:52,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:52,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:52,647 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:52,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:28:52,847 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 14:28:52,848 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:52,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:52,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1707201085, now seen corresponding path program 1 times [2025-03-17 14:28:52,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:52,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217706563] [2025-03-17 14:28:52,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:52,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:52,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:28:52,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:28:52,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:52,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217706563] [2025-03-17 14:28:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217706563] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:53,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:53,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:28:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708500996] [2025-03-17 14:28:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:53,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:28:53,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:53,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:28:53,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:28:53,038 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:53,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:53,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:53,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:53,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:53,378 INFO L124 PetriNetUnfolderBase]: 2597/3797 cut-off events. [2025-03-17 14:28:53,378 INFO L125 PetriNetUnfolderBase]: For 10316/10743 co-relation queries the response was YES. [2025-03-17 14:28:53,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13275 conditions, 3797 events. 2597/3797 cut-off events. For 10316/10743 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18178 event pairs, 861 based on Foata normal form. 0/3634 useless extension candidates. Maximal degree in co-relation 7067. Up to 1688 conditions per place. [2025-03-17 14:28:53,395 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 88 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2025-03-17 14:28:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 798 flow [2025-03-17 14:28:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:28:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:28:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2025-03-17 14:28:53,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 14:28:53,396 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 292 flow. Second operand 6 states and 110 transitions. [2025-03-17 14:28:53,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 798 flow [2025-03-17 14:28:53,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 783 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 14:28:53,404 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 303 flow [2025-03-17 14:28:53,404 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2025-03-17 14:28:53,404 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2025-03-17 14:28:53,404 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 303 flow [2025-03-17 14:28:53,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:28:53,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:53,404 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:53,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:28:53,407 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:53,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash -741840289, now seen corresponding path program 1 times [2025-03-17 14:28:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:53,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17987925] [2025-03-17 14:28:53,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:53,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:28:53,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:28:53,417 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:53,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:53,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17987925] [2025-03-17 14:28:53,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17987925] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032765578] [2025-03-17 14:28:53,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:53,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:53,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:53,499 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 14:28:53,501 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 14:28:53,541 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 14:28:53,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:28:53,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:53,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:53,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:28:53,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:53,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:53,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032765578] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:53,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:53,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-17 14:28:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382124985] [2025-03-17 14:28:53,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:53,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:28:53,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:53,671 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:28:53,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:28:53,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:53,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 303 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 14:28:53,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:53,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:53,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:54,070 INFO L124 PetriNetUnfolderBase]: 2491/3649 cut-off events. [2025-03-17 14:28:54,070 INFO L125 PetriNetUnfolderBase]: For 8969/9344 co-relation queries the response was YES. [2025-03-17 14:28:54,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 3649 events. 2491/3649 cut-off events. For 8969/9344 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17250 event pairs, 1398 based on Foata normal form. 54/3700 useless extension candidates. Maximal degree in co-relation 7887. Up to 2199 conditions per place. [2025-03-17 14:28:54,088 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 13 changer transitions 0/104 dead transitions. [2025-03-17 14:28:54,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 761 flow [2025-03-17 14:28:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:28:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:28:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2025-03-17 14:28:54,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2025-03-17 14:28:54,091 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 303 flow. Second operand 8 states and 156 transitions. [2025-03-17 14:28:54,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 761 flow [2025-03-17 14:28:54,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 719 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:28:54,100 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 359 flow [2025-03-17 14:28:54,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=359, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2025-03-17 14:28:54,101 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2025-03-17 14:28:54,102 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 359 flow [2025-03-17 14:28:54,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 14:28:54,102 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:54,102 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:54,108 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 14:28:54,302 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,SelfDestructingSolverStorable11 [2025-03-17 14:28:54,303 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:54,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1994839427, now seen corresponding path program 2 times [2025-03-17 14:28:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695254242] [2025-03-17 14:28:54,303 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:28:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:54,308 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:28:54,314 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:28:54,314 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:28:54,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:28:54,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:54,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695254242] [2025-03-17 14:28:54,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695254242] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:54,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622455612] [2025-03-17 14:28:54,465 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:28:54,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:54,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:54,467 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 14:28:54,469 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 14:28:54,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-17 14:28:54,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 14:28:54,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:28:54,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:54,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:28:54,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:54,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 14:28:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:54,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622455612] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:54,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-03-17 14:28:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467182052] [2025-03-17 14:28:54,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:54,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 14:28:54,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:54,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 14:28:54,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:28:54,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-03-17 14:28:54,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 359 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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 14:28:54,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:54,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-03-17 14:28:54,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:55,664 INFO L124 PetriNetUnfolderBase]: 2799/4009 cut-off events. [2025-03-17 14:28:55,664 INFO L125 PetriNetUnfolderBase]: For 10486/11077 co-relation queries the response was YES. [2025-03-17 14:28:55,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14908 conditions, 4009 events. 2799/4009 cut-off events. For 10486/11077 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18648 event pairs, 494 based on Foata normal form. 124/4131 useless extension candidates. Maximal degree in co-relation 9403. Up to 654 conditions per place. [2025-03-17 14:28:55,684 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 164 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2025-03-17 14:28:55,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 188 transitions, 1335 flow [2025-03-17 14:28:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:28:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:28:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2025-03-17 14:28:55,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2025-03-17 14:28:55,685 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 359 flow. Second operand 14 states and 275 transitions. [2025-03-17 14:28:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 188 transitions, 1335 flow [2025-03-17 14:28:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 188 transitions, 1307 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-17 14:28:55,696 INFO L231 Difference]: Finished difference. Result has 85 places, 60 transitions, 419 flow [2025-03-17 14:28:55,696 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=419, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2025-03-17 14:28:55,696 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2025-03-17 14:28:55,696 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 419 flow [2025-03-17 14:28:55,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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 14:28:55,697 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:55,697 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:55,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:55,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:55,899 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:55,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2037228329, now seen corresponding path program 2 times [2025-03-17 14:28:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843103476] [2025-03-17 14:28:55,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:28:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:55,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:28:55,909 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:28:55,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:28:55,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:28:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843103476] [2025-03-17 14:28:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843103476] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:56,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581038574] [2025-03-17 14:28:56,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:28:56,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:56,037 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 14:28:56,038 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 14:28:56,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-03-17 14:28:56,087 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:28:56,088 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:28:56,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:56,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 14:28:56,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:56,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:56,273 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 24 treesize of output 20 [2025-03-17 14:28:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581038574] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:28:56,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:28:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-03-17 14:28:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904004428] [2025-03-17 14:28:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:28:56,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 14:28:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:56,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 14:28:56,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:28:56,431 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:56,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 419 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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 14:28:56,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:56,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:56,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:57,308 INFO L124 PetriNetUnfolderBase]: 3521/4988 cut-off events. [2025-03-17 14:28:57,308 INFO L125 PetriNetUnfolderBase]: For 17916/18646 co-relation queries the response was YES. [2025-03-17 14:28:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19834 conditions, 4988 events. 3521/4988 cut-off events. For 17916/18646 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 22756 event pairs, 544 based on Foata normal form. 168/5152 useless extension candidates. Maximal degree in co-relation 14036. Up to 912 conditions per place. [2025-03-17 14:28:57,330 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 167 selfloop transitions, 21 changer transitions 0/193 dead transitions. [2025-03-17 14:28:57,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 1543 flow [2025-03-17 14:28:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-17 14:28:57,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-17 14:28:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2025-03-17 14:28:57,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2025-03-17 14:28:57,333 INFO L175 Difference]: Start difference. First operand has 85 places, 60 transitions, 419 flow. Second operand 14 states and 277 transitions. [2025-03-17 14:28:57,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 1543 flow [2025-03-17 14:28:57,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 193 transitions, 1352 flow, removed 39 selfloop flow, removed 10 redundant places. [2025-03-17 14:28:57,345 INFO L231 Difference]: Finished difference. Result has 89 places, 64 transitions, 442 flow [2025-03-17 14:28:57,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=442, PETRI_PLACES=89, PETRI_TRANSITIONS=64} [2025-03-17 14:28:57,345 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2025-03-17 14:28:57,345 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 64 transitions, 442 flow [2025-03-17 14:28:57,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 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 14:28:57,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:57,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:28:57,351 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 14:28:57,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:57,546 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:57,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1372987530, now seen corresponding path program 1 times [2025-03-17 14:28:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:57,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286038347] [2025-03-17 14:28:57,547 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:57,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:57,555 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:28:57,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:28:57,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:57,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:57,587 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 14:28:57,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:57,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286038347] [2025-03-17 14:28:57,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286038347] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:57,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:57,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:28:57,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751886103] [2025-03-17 14:28:57,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:57,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:28:57,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:57,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:28:57,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:28:57,589 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2025-03-17 14:28:57,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 64 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 14:28:57,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:57,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2025-03-17 14:28:57,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:57,870 INFO L124 PetriNetUnfolderBase]: 3013/4541 cut-off events. [2025-03-17 14:28:57,871 INFO L125 PetriNetUnfolderBase]: For 17245/17937 co-relation queries the response was YES. [2025-03-17 14:28:57,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18055 conditions, 4541 events. 3013/4541 cut-off events. For 17245/17937 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 21895 event pairs, 715 based on Foata normal form. 3/4527 useless extension candidates. Maximal degree in co-relation 12293. Up to 3581 conditions per place. [2025-03-17 14:28:57,892 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 65 selfloop transitions, 4 changer transitions 8/85 dead transitions. [2025-03-17 14:28:57,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 85 transitions, 719 flow [2025-03-17 14:28:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:28:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:28:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-17 14:28:57,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2025-03-17 14:28:57,893 INFO L175 Difference]: Start difference. First operand has 89 places, 64 transitions, 442 flow. Second operand 3 states and 74 transitions. [2025-03-17 14:28:57,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 85 transitions, 719 flow [2025-03-17 14:28:57,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 85 transitions, 650 flow, removed 13 selfloop flow, removed 9 redundant places. [2025-03-17 14:28:57,908 INFO L231 Difference]: Finished difference. Result has 83 places, 60 transitions, 362 flow [2025-03-17 14:28:57,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2025-03-17 14:28:57,908 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2025-03-17 14:28:57,908 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 362 flow [2025-03-17 14:28:57,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 14:28:57,908 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:57,908 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] [2025-03-17 14:28:57,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:28:57,909 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:57,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1975026305, now seen corresponding path program 1 times [2025-03-17 14:28:57,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:57,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959609861] [2025-03-17 14:28:57,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:57,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:57,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:28:57,917 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:28:57,917 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:57,917 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:57,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:57,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959609861] [2025-03-17 14:28:57,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959609861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:57,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886170820] [2025-03-17 14:28:57,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:57,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:57,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:57,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:28:57,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:28:58,022 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:28:58,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:28:58,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:58,038 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:58,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:28:58,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:58,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886170820] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:58,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:28:58,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-03-17 14:28:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063522083] [2025-03-17 14:28:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:58,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:28:58,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:58,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:28:58,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:28:58,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2025-03-17 14:28:58,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 14:28:58,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2025-03-17 14:28:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:58,367 INFO L124 PetriNetUnfolderBase]: 3449/5045 cut-off events. [2025-03-17 14:28:58,367 INFO L125 PetriNetUnfolderBase]: For 14848/15374 co-relation queries the response was YES. [2025-03-17 14:28:58,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19309 conditions, 5045 events. 3449/5045 cut-off events. For 14848/15374 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 24511 event pairs, 1018 based on Foata normal form. 166/5113 useless extension candidates. Maximal degree in co-relation 14567. Up to 2830 conditions per place. [2025-03-17 14:28:58,393 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 68 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2025-03-17 14:28:58,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 652 flow [2025-03-17 14:28:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:28:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:28:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-03-17 14:28:58,394 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-17 14:28:58,394 INFO L175 Difference]: Start difference. First operand has 83 places, 60 transitions, 362 flow. Second operand 5 states and 88 transitions. [2025-03-17 14:28:58,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 652 flow [2025-03-17 14:28:58,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 588 flow, removed 18 selfloop flow, removed 7 redundant places. [2025-03-17 14:28:58,412 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 341 flow [2025-03-17 14:28:58,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2025-03-17 14:28:58,413 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2025-03-17 14:28:58,413 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 341 flow [2025-03-17 14:28:58,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 14:28:58,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:58,413 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] [2025-03-17 14:28:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:58,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 14:28:58,614 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:58,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:58,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1258961784, now seen corresponding path program 1 times [2025-03-17 14:28:58,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:58,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66027152] [2025-03-17 14:28:58,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:58,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:58,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:28:58,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:28:58,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:58,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:28:58,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66027152] [2025-03-17 14:28:58,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66027152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:58,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739288126] [2025-03-17 14:28:58,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:28:58,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:28:58,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:28:58,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:28:58,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:28:58,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:28:58,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:28:58,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:28:58,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:58,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:28:58,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:28:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:58,814 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:28:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:28:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739288126] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:28:58,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:28:58,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2025-03-17 14:28:58,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686112281] [2025-03-17 14:28:58,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:58,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:28:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:58,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:28:58,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:28:58,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-03-17 14:28:58,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:28:58,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:58,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-03-17 14:28:58,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:28:59,310 INFO L124 PetriNetUnfolderBase]: 4417/6334 cut-off events. [2025-03-17 14:28:59,310 INFO L125 PetriNetUnfolderBase]: For 16964/17082 co-relation queries the response was YES. [2025-03-17 14:28:59,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22357 conditions, 6334 events. 4417/6334 cut-off events. For 16964/17082 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 31511 event pairs, 1172 based on Foata normal form. 0/5906 useless extension candidates. Maximal degree in co-relation 16701. Up to 2406 conditions per place. [2025-03-17 14:28:59,334 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 144 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2025-03-17 14:28:59,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 170 transitions, 1349 flow [2025-03-17 14:28:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:28:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:28:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2025-03-17 14:28:59,335 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-17 14:28:59,335 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 341 flow. Second operand 9 states and 165 transitions. [2025-03-17 14:28:59,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 170 transitions, 1349 flow [2025-03-17 14:28:59,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 170 transitions, 1302 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-17 14:28:59,348 INFO L231 Difference]: Finished difference. Result has 82 places, 71 transitions, 439 flow [2025-03-17 14:28:59,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=439, PETRI_PLACES=82, PETRI_TRANSITIONS=71} [2025-03-17 14:28:59,349 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 36 predicate places. [2025-03-17 14:28:59,349 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 71 transitions, 439 flow [2025-03-17 14:28:59,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:28:59,349 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:28:59,349 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] [2025-03-17 14:28:59,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:28:59,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:28:59,549 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:28:59,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:28:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash -46082600, now seen corresponding path program 2 times [2025-03-17 14:28:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:28:59,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57527070] [2025-03-17 14:28:59,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:28:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:28:59,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:28:59,556 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 24 statements. [2025-03-17 14:28:59,556 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:28:59,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:28:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:28:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:28:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57527070] [2025-03-17 14:28:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57527070] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:28:59,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:28:59,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:28:59,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997288599] [2025-03-17 14:28:59,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:28:59,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:28:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:28:59,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:28:59,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:28:59,594 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2025-03-17 14:28:59,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 71 transitions, 439 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:28:59,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:28:59,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2025-03-17 14:28:59,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:00,617 INFO L124 PetriNetUnfolderBase]: 8880/12569 cut-off events. [2025-03-17 14:29:00,617 INFO L125 PetriNetUnfolderBase]: For 31581/31581 co-relation queries the response was YES. [2025-03-17 14:29:00,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47330 conditions, 12569 events. 8880/12569 cut-off events. For 31581/31581 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 63678 event pairs, 479 based on Foata normal form. 28/12384 useless extension candidates. Maximal degree in co-relation 36756. Up to 2968 conditions per place. [2025-03-17 14:29:00,669 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 308 selfloop transitions, 118 changer transitions 0/427 dead transitions. [2025-03-17 14:29:00,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 427 transitions, 3467 flow [2025-03-17 14:29:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 14:29:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 14:29:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 305 transitions. [2025-03-17 14:29:00,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4077540106951872 [2025-03-17 14:29:00,671 INFO L175 Difference]: Start difference. First operand has 82 places, 71 transitions, 439 flow. Second operand 17 states and 305 transitions. [2025-03-17 14:29:00,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 427 transitions, 3467 flow [2025-03-17 14:29:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 427 transitions, 3464 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:00,711 INFO L231 Difference]: Finished difference. Result has 108 places, 177 transitions, 1650 flow [2025-03-17 14:29:00,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1650, PETRI_PLACES=108, PETRI_TRANSITIONS=177} [2025-03-17 14:29:00,712 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 62 predicate places. [2025-03-17 14:29:00,712 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 177 transitions, 1650 flow [2025-03-17 14:29:00,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:00,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:00,712 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] [2025-03-17 14:29:00,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:29:00,712 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:00,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2070810432, now seen corresponding path program 3 times [2025-03-17 14:29:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134432272] [2025-03-17 14:29:00,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:29:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:00,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 3 equivalence classes. [2025-03-17 14:29:00,720 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 24 statements. [2025-03-17 14:29:00,720 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 14:29:00,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:00,753 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 14:29:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134432272] [2025-03-17 14:29:00,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134432272] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:00,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:00,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:29:00,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969357880] [2025-03-17 14:29:00,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:00,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:00,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:00,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:00,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:29:00,762 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2025-03-17 14:29:00,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 177 transitions, 1650 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:00,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:00,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2025-03-17 14:29:00,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:01,975 INFO L124 PetriNetUnfolderBase]: 11076/15629 cut-off events. [2025-03-17 14:29:01,975 INFO L125 PetriNetUnfolderBase]: For 75748/75748 co-relation queries the response was YES. [2025-03-17 14:29:02,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72643 conditions, 15629 events. 11076/15629 cut-off events. For 75748/75748 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 81408 event pairs, 4222 based on Foata normal form. 4/15633 useless extension candidates. Maximal degree in co-relation 63563. Up to 9120 conditions per place. [2025-03-17 14:29:02,141 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 279 selfloop transitions, 89 changer transitions 3/372 dead transitions. [2025-03-17 14:29:02,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 372 transitions, 4122 flow [2025-03-17 14:29:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:29:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:29:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-03-17 14:29:02,143 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2025-03-17 14:29:02,143 INFO L175 Difference]: Start difference. First operand has 108 places, 177 transitions, 1650 flow. Second operand 7 states and 135 transitions. [2025-03-17 14:29:02,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 372 transitions, 4122 flow [2025-03-17 14:29:02,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 372 transitions, 4032 flow, removed 22 selfloop flow, removed 1 redundant places. [2025-03-17 14:29:02,586 INFO L231 Difference]: Finished difference. Result has 118 places, 226 transitions, 2498 flow [2025-03-17 14:29:02,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=118, PETRI_TRANSITIONS=226} [2025-03-17 14:29:02,586 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 72 predicate places. [2025-03-17 14:29:02,586 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 226 transitions, 2498 flow [2025-03-17 14:29:02,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:02,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:02,587 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] [2025-03-17 14:29:02,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:29:02,587 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:02,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:02,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1062119798, now seen corresponding path program 4 times [2025-03-17 14:29:02,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:02,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6588160] [2025-03-17 14:29:02,587 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:29:02,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:02,593 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:29:02,598 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 21 of 24 statements. [2025-03-17 14:29:02,599 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 14:29:02,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:29:02,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:02,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6588160] [2025-03-17 14:29:02,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6588160] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:29:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146566179] [2025-03-17 14:29:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:02,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:02,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:02,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:29:02,657 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2025-03-17 14:29:02,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 226 transitions, 2498 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:02,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:02,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2025-03-17 14:29:02,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:05,470 INFO L124 PetriNetUnfolderBase]: 21414/29774 cut-off events. [2025-03-17 14:29:05,470 INFO L125 PetriNetUnfolderBase]: For 188311/188311 co-relation queries the response was YES. [2025-03-17 14:29:05,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147154 conditions, 29774 events. 21414/29774 cut-off events. For 188311/188311 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 164838 event pairs, 1487 based on Foata normal form. 44/29818 useless extension candidates. Maximal degree in co-relation 131608. Up to 7461 conditions per place. [2025-03-17 14:29:05,756 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 497 selfloop transitions, 355 changer transitions 0/853 dead transitions. [2025-03-17 14:29:05,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 853 transitions, 10531 flow [2025-03-17 14:29:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 14:29:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 14:29:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 324 transitions. [2025-03-17 14:29:05,758 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-03-17 14:29:05,758 INFO L175 Difference]: Start difference. First operand has 118 places, 226 transitions, 2498 flow. Second operand 18 states and 324 transitions. [2025-03-17 14:29:05,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 853 transitions, 10531 flow [2025-03-17 14:29:07,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 853 transitions, 10238 flow, removed 51 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:07,074 INFO L231 Difference]: Finished difference. Result has 148 places, 529 transitions, 7392 flow [2025-03-17 14:29:07,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2403, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7392, PETRI_PLACES=148, PETRI_TRANSITIONS=529} [2025-03-17 14:29:07,074 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 102 predicate places. [2025-03-17 14:29:07,074 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 529 transitions, 7392 flow [2025-03-17 14:29:07,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:07,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:07,075 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] [2025-03-17 14:29:07,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:29:07,075 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:07,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1780140000, now seen corresponding path program 5 times [2025-03-17 14:29:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:07,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050116367] [2025-03-17 14:29:07,075 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:29:07,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:07,081 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-17 14:29:07,086 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:07,087 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:29:07,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:07,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:07,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050116367] [2025-03-17 14:29:07,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050116367] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:07,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565194774] [2025-03-17 14:29:07,148 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 14:29:07,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:07,150 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:29:07,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:29:07,193 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 3 equivalence classes. [2025-03-17 14:29:07,211 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:07,211 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-17 14:29:07,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:07,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:29:07,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:07,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:07,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565194774] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:29:07,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-17 14:29:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535005750] [2025-03-17 14:29:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:07,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:07,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:07,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:29:07,354 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-03-17 14:29:07,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 529 transitions, 7392 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:29:07,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:07,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-03-17 14:29:07,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:11,538 INFO L124 PetriNetUnfolderBase]: 23273/33239 cut-off events. [2025-03-17 14:29:11,538 INFO L125 PetriNetUnfolderBase]: For 329183/329968 co-relation queries the response was YES. [2025-03-17 14:29:11,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191205 conditions, 33239 events. 23273/33239 cut-off events. For 329183/329968 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 202470 event pairs, 3144 based on Foata normal form. 254/33271 useless extension candidates. Maximal degree in co-relation 182698. Up to 15641 conditions per place. [2025-03-17 14:29:11,899 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 538 selfloop transitions, 273 changer transitions 0/834 dead transitions. [2025-03-17 14:29:11,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 834 transitions, 12666 flow [2025-03-17 14:29:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:29:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:29:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2025-03-17 14:29:11,900 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2025-03-17 14:29:11,900 INFO L175 Difference]: Start difference. First operand has 148 places, 529 transitions, 7392 flow. Second operand 8 states and 150 transitions. [2025-03-17 14:29:11,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 834 transitions, 12666 flow [2025-03-17 14:29:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 834 transitions, 12264 flow, removed 201 selfloop flow, removed 0 redundant places. [2025-03-17 14:29:17,244 INFO L231 Difference]: Finished difference. Result has 160 places, 651 transitions, 9924 flow [2025-03-17 14:29:17,244 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7070, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9924, PETRI_PLACES=160, PETRI_TRANSITIONS=651} [2025-03-17 14:29:17,244 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 114 predicate places. [2025-03-17 14:29:17,244 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 651 transitions, 9924 flow [2025-03-17 14:29:17,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:29:17,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:17,244 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] [2025-03-17 14:29:17,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:29:17,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2025-03-17 14:29:17,445 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:17,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash 2076101374, now seen corresponding path program 6 times [2025-03-17 14:29:17,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:17,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465792985] [2025-03-17 14:29:17,446 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 14:29:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:17,451 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 24 statements into 3 equivalence classes. [2025-03-17 14:29:17,453 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 21 of 24 statements. [2025-03-17 14:29:17,453 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 14:29:17,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:29:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:17,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465792985] [2025-03-17 14:29:17,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465792985] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:29:17,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:29:17,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:29:17,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740743685] [2025-03-17 14:29:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:17,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:17,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:17,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:17,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:29:17,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2025-03-17 14:29:17,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 651 transitions, 9924 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:17,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:17,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2025-03-17 14:29:17,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:24,382 INFO L124 PetriNetUnfolderBase]: 32010/44515 cut-off events. [2025-03-17 14:29:24,382 INFO L125 PetriNetUnfolderBase]: For 497791/497791 co-relation queries the response was YES. [2025-03-17 14:29:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272486 conditions, 44515 events. 32010/44515 cut-off events. For 497791/497791 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 260012 event pairs, 3210 based on Foata normal form. 44/44559 useless extension candidates. Maximal degree in co-relation 260713. Up to 13143 conditions per place. [2025-03-17 14:29:24,991 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 578 selfloop transitions, 636 changer transitions 1/1216 dead transitions. [2025-03-17 14:29:24,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 1216 transitions, 19415 flow [2025-03-17 14:29:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 14:29:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 14:29:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 367 transitions. [2025-03-17 14:29:24,993 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3971861471861472 [2025-03-17 14:29:24,993 INFO L175 Difference]: Start difference. First operand has 160 places, 651 transitions, 9924 flow. Second operand 21 states and 367 transitions. [2025-03-17 14:29:24,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 1216 transitions, 19415 flow [2025-03-17 14:29:31,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 1216 transitions, 19210 flow, removed 101 selfloop flow, removed 2 redundant places. [2025-03-17 14:29:31,769 INFO L231 Difference]: Finished difference. Result has 190 places, 943 transitions, 16714 flow [2025-03-17 14:29:31,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9751, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16714, PETRI_PLACES=190, PETRI_TRANSITIONS=943} [2025-03-17 14:29:31,770 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 144 predicate places. [2025-03-17 14:29:31,770 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 943 transitions, 16714 flow [2025-03-17 14:29:31,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 14:29:31,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:31,770 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] [2025-03-17 14:29:31,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:29:31,770 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:31,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1933794684, now seen corresponding path program 7 times [2025-03-17 14:29:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418720208] [2025-03-17 14:29:31,771 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:29:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:31,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:29:31,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:31,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:31,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:31,831 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 14:29:31,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:31,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418720208] [2025-03-17 14:29:31,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418720208] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:31,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500378325] [2025-03-17 14:29:31,832 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 14:29:31,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:31,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:29:31,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:29:31,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:29:31,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:31,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:29:31,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:31,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:29:31,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:31,953 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:32,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500378325] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:32,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:29:32,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2025-03-17 14:29:32,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703298971] [2025-03-17 14:29:32,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:32,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:32,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:32,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:32,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2025-03-17 14:29:32,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-03-17 14:29:32,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 943 transitions, 16714 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:29:32,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:32,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-03-17 14:29:32,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:29:39,202 INFO L124 PetriNetUnfolderBase]: 31519/44531 cut-off events. [2025-03-17 14:29:39,202 INFO L125 PetriNetUnfolderBase]: For 653575/654847 co-relation queries the response was YES. [2025-03-17 14:29:39,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295687 conditions, 44531 events. 31519/44531 cut-off events. For 653575/654847 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 275869 event pairs, 4177 based on Foata normal form. 536/44830 useless extension candidates. Maximal degree in co-relation 288140. Up to 15276 conditions per place. [2025-03-17 14:29:39,862 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 681 selfloop transitions, 655 changer transitions 0/1365 dead transitions. [2025-03-17 14:29:39,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1365 transitions, 25841 flow [2025-03-17 14:29:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:29:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:29:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2025-03-17 14:29:39,863 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2025-03-17 14:29:39,863 INFO L175 Difference]: Start difference. First operand has 190 places, 943 transitions, 16714 flow. Second operand 9 states and 175 transitions. [2025-03-17 14:29:39,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1365 transitions, 25841 flow [2025-03-17 14:29:52,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1365 transitions, 25397 flow, removed 222 selfloop flow, removed 0 redundant places. [2025-03-17 14:29:52,871 INFO L231 Difference]: Finished difference. Result has 202 places, 1121 transitions, 21790 flow [2025-03-17 14:29:52,871 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16410, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21790, PETRI_PLACES=202, PETRI_TRANSITIONS=1121} [2025-03-17 14:29:52,871 INFO L279 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2025-03-17 14:29:52,871 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 1121 transitions, 21790 flow [2025-03-17 14:29:52,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:29:52,872 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:29:52,872 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] [2025-03-17 14:29:52,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:29:53,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-03-17 14:29:53,072 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-03-17 14:29:53,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:29:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash -304966254, now seen corresponding path program 8 times [2025-03-17 14:29:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:29:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455874223] [2025-03-17 14:29:53,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:29:53,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:29:53,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:29:53,081 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:53,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:29:53,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:53,122 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 14:29:53,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:29:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455874223] [2025-03-17 14:29:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455874223] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090959430] [2025-03-17 14:29:53,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:29:53,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:29:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:29:53,125 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:29:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:29:53,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:29:53,179 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:29:53,179 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:29:53,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:29:53,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:29:53,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:29:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:53,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:29:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:29:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090959430] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:29:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:29:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2025-03-17 14:29:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782400042] [2025-03-17 14:29:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:29:53,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:29:53,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:29:53,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:29:53,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:29:53,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2025-03-17 14:29:53,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 1121 transitions, 21790 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 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 14:29:53,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:29:53,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2025-03-17 14:29:53,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:30:01,996 INFO L124 PetriNetUnfolderBase]: 31404/44188 cut-off events. [2025-03-17 14:30:01,996 INFO L125 PetriNetUnfolderBase]: For 771576/773108 co-relation queries the response was YES. [2025-03-17 14:30:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309007 conditions, 44188 events. 31404/44188 cut-off events. For 771576/773108 co-relation queries the response was YES. Maximal size of possible extension queue 1264. Compared 272274 event pairs, 3773 based on Foata normal form. 554/44501 useless extension candidates. Maximal degree in co-relation 303515. Up to 12503 conditions per place. [2025-03-17 14:30:02,952 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 630 selfloop transitions, 659 changer transitions 0/1318 dead transitions. [2025-03-17 14:30:02,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1318 transitions, 27010 flow [2025-03-17 14:30:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:30:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:30:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2025-03-17 14:30:02,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2025-03-17 14:30:02,954 INFO L175 Difference]: Start difference. First operand has 202 places, 1121 transitions, 21790 flow. Second operand 9 states and 170 transitions. [2025-03-17 14:30:02,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1318 transitions, 27010 flow