./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed 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-commit-1.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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:24:21,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:24:21,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:24:21,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:24:21,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:24:21,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:24:21,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:24:21,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:24:21,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:24:21,892 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:24:21,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:24:21,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:24:21,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:24:21,893 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:24:21,893 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:24:21,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:24:21,894 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:24:21,895 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:24:21,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:24:21,895 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:24:21,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:24:21,896 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 -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2025-03-09 01:24:22,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:24:22,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:24:22,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:24:22,141 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:24:22,141 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:24:22,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-09 01:24:23,334 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cccba2b2/7c4ed36010d044a7939e911b4d834811/FLAG81f55d75c [2025-03-09 01:24:23,577 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:24:23,581 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2025-03-09 01:24:23,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cccba2b2/7c4ed36010d044a7939e911b4d834811/FLAG81f55d75c [2025-03-09 01:24:23,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cccba2b2/7c4ed36010d044a7939e911b4d834811 [2025-03-09 01:24:23,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:24:23,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:24:23,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:24:23,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:24:23,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:24:23,914 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:24:23" (1/1) ... [2025-03-09 01:24:23,916 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e0c5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:23, skipping insertion in model container [2025-03-09 01:24:23,916 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:24:23" (1/1) ... [2025-03-09 01:24:23,933 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:24:24,081 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:24:24,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:24:24,093 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:24:24,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:24:24,141 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:24:24,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24 WrapperNode [2025-03-09 01:24:24,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:24:24,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:24:24,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:24:24,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:24:24,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,153 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,178 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 327 [2025-03-09 01:24:24,178 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:24:24,179 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:24:24,179 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:24:24,179 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:24:24,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,190 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,212 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-09 01:24:24,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,213 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,225 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,227 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:24:24,234 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:24:24,234 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:24:24,234 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:24:24,237 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (1/1) ... [2025-03-09 01:24:24,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:24:24,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:24,265 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) [2025-03-09 01:24:24,267 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 [2025-03-09 01:24:24,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:24:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:24:24,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:24:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:24:24,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:24:24,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-09 01:24:24,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:24:24,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:24:24,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:24:24,289 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:24:24,384 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:24:24,386 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:24:24,833 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:24:24,834 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:24:25,083 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:24:25,083 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:24:25,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:24:25 BoogieIcfgContainer [2025-03-09 01:24:25,083 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:24:25,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:24:25,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:24:25,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:24:25,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:24:23" (1/3) ... [2025-03-09 01:24:25,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb589b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:24:25, skipping insertion in model container [2025-03-09 01:24:25,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:24:24" (2/3) ... [2025-03-09 01:24:25,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ceb589b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:24:25, skipping insertion in model container [2025-03-09 01:24:25,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:24:25" (3/3) ... [2025-03-09 01:24:25,089 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2025-03-09 01:24:25,100 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:24:25,101 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-commit-1.wvr.c that has 4 procedures, 67 locations, 1 initial locations, 6 loop locations, and 24 error locations. [2025-03-09 01:24:25,101 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:24:25,158 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-09 01:24:25,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2025-03-09 01:24:25,242 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2025-03-09 01:24:25,243 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-09 01:24:25,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2025-03-09 01:24:25,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2025-03-09 01:24:25,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2025-03-09 01:24:25,262 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:24:25,274 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;@2ca7ddb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:24:25,275 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2025-03-09 01:24:25,278 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:24:25,278 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:24:25,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:24:25,278 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:25,279 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:24:25,279 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:25,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash 920790, now seen corresponding path program 1 times [2025-03-09 01:24:25,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:25,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609867773] [2025-03-09 01:24:25,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:25,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:25,339 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:24:25,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:24:25,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:25,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:25,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:25,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609867773] [2025-03-09 01:24:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609867773] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:25,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:25,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:24:25,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931604988] [2025-03-09 01:24:25,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:25,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:25,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:25,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:25,526 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:25,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:25,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:25,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:25,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:26,796 INFO L124 PetriNetUnfolderBase]: 11284/15951 cut-off events. [2025-03-09 01:24:26,797 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2025-03-09 01:24:26,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32435 conditions, 15951 events. 11284/15951 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 91017 event pairs, 10210 based on Foata normal form. 1/9516 useless extension candidates. Maximal degree in co-relation 31495. Up to 15928 conditions per place. [2025-03-09 01:24:26,895 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2025-03-09 01:24:26,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2025-03-09 01:24:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-09 01:24:26,909 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2025-03-09 01:24:26,910 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2025-03-09 01:24:26,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2025-03-09 01:24:26,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 01:24:26,921 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2025-03-09 01:24:26,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2025-03-09 01:24:26,926 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-03-09 01:24:26,927 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2025-03-09 01:24:26,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:26,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:26,927 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:24:26,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:24:26,928 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:26,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash 920791, now seen corresponding path program 1 times [2025-03-09 01:24:26,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:26,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649470022] [2025-03-09 01:24:26,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:26,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:26,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:24:26,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:24:26,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:26,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:27,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:27,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649470022] [2025-03-09 01:24:27,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649470022] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:27,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:27,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246901164] [2025-03-09 01:24:27,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:27,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:27,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:27,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:27,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:27,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:27,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:27,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:27,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:27,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:28,341 INFO L124 PetriNetUnfolderBase]: 11284/15948 cut-off events. [2025-03-09 01:24:28,341 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2025-03-09 01:24:28,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32094 conditions, 15948 events. 11284/15948 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 90967 event pairs, 10210 based on Foata normal form. 0/9513 useless extension candidates. Maximal degree in co-relation 32069. Up to 15928 conditions per place. [2025-03-09 01:24:28,421 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2025-03-09 01:24:28,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 242 flow [2025-03-09 01:24:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2025-03-09 01:24:28,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2025-03-09 01:24:28,423 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 103 transitions. [2025-03-09 01:24:28,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 242 flow [2025-03-09 01:24:28,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:28,425 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 142 flow [2025-03-09 01:24:28,425 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2025-03-09 01:24:28,427 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2025-03-09 01:24:28,427 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 142 flow [2025-03-09 01:24:28,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:28,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:28,428 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:28,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:24:28,432 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:28,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -693770061, now seen corresponding path program 1 times [2025-03-09 01:24:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:28,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505572979] [2025-03-09 01:24:28,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:28,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:24:28,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:24:28,458 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:28,458 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:28,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:28,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505572979] [2025-03-09 01:24:28,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505572979] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:28,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:28,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:24:28,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233216916] [2025-03-09 01:24:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:28,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:28,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:28,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:28,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:28,553 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:28,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:28,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:28,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:28,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:29,524 INFO L124 PetriNetUnfolderBase]: 13080/18542 cut-off events. [2025-03-09 01:24:29,525 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2025-03-09 01:24:29,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37308 conditions, 18542 events. 13080/18542 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 107586 event pairs, 4436 based on Foata normal form. 162/11389 useless extension candidates. Maximal degree in co-relation 37277. Up to 15883 conditions per place. [2025-03-09 01:24:29,611 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 81 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-03-09 01:24:29,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 370 flow [2025-03-09 01:24:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2025-03-09 01:24:29,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2025-03-09 01:24:29,614 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 142 flow. Second operand 3 states and 129 transitions. [2025-03-09 01:24:29,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 370 flow [2025-03-09 01:24:29,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:29,617 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 149 flow [2025-03-09 01:24:29,617 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2025-03-09 01:24:29,618 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -11 predicate places. [2025-03-09 01:24:29,619 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 149 flow [2025-03-09 01:24:29,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:29,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:29,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:29,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 01:24:29,619 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:29,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1584614156, now seen corresponding path program 1 times [2025-03-09 01:24:29,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:29,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667588503] [2025-03-09 01:24:29,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:29,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:24:29,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:24:29,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:29,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:29,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667588503] [2025-03-09 01:24:29,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667588503] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:29,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:29,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:29,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642744578] [2025-03-09 01:24:29,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:29,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:29,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:29,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:29,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:29,716 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:29,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:29,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:29,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:29,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:30,681 INFO L124 PetriNetUnfolderBase]: 12327/17506 cut-off events. [2025-03-09 01:24:30,681 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2025-03-09 01:24:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36906 conditions, 17506 events. 12327/17506 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 95686 event pairs, 4948 based on Foata normal form. 297/11610 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2025-03-09 01:24:30,746 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2025-03-09 01:24:30,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 90 transitions, 385 flow [2025-03-09 01:24:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2025-03-09 01:24:30,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-03-09 01:24:30,748 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 149 flow. Second operand 3 states and 130 transitions. [2025-03-09 01:24:30,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 90 transitions, 385 flow [2025-03-09 01:24:30,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:30,755 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 158 flow [2025-03-09 01:24:30,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2025-03-09 01:24:30,756 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-03-09 01:24:30,757 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 158 flow [2025-03-09 01:24:30,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:30,757 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:30,757 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:30,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 01:24:30,757 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:30,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash 836489911, now seen corresponding path program 1 times [2025-03-09 01:24:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036530147] [2025-03-09 01:24:30,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:30,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:24:30,775 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:24:30,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:30,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:30,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036530147] [2025-03-09 01:24:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036530147] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:30,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:30,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433295585] [2025-03-09 01:24:30,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:30,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:30,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:30,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:30,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:30,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:30,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:30,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:30,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:30,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:31,703 INFO L124 PetriNetUnfolderBase]: 12939/18483 cut-off events. [2025-03-09 01:24:31,704 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2025-03-09 01:24:31,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40233 conditions, 18483 events. 12939/18483 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 102862 event pairs, 11912 based on Foata normal form. 112/12534 useless extension candidates. Maximal degree in co-relation 12447. Up to 17493 conditions per place. [2025-03-09 01:24:31,777 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 81 selfloop transitions, 9 changer transitions 3/97 dead transitions. [2025-03-09 01:24:31,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 420 flow [2025-03-09 01:24:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2025-03-09 01:24:31,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43733333333333335 [2025-03-09 01:24:31,778 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 158 flow. Second operand 5 states and 164 transitions. [2025-03-09 01:24:31,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 420 flow [2025-03-09 01:24:31,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:31,783 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 228 flow [2025-03-09 01:24:31,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2025-03-09 01:24:31,783 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2025-03-09 01:24:31,783 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 228 flow [2025-03-09 01:24:31,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:31,783 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:31,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:31,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 01:24:31,784 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:31,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1716175215, now seen corresponding path program 1 times [2025-03-09 01:24:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:31,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29785185] [2025-03-09 01:24:31,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:31,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:31,791 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:24:31,808 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:24:31,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:31,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:32,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29785185] [2025-03-09 01:24:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29785185] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:32,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087551088] [2025-03-09 01:24:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:32,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:24:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:32,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:24:32,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-09 01:24:32,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:32,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:32,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:32,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:32,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:32,714 INFO L124 PetriNetUnfolderBase]: 7303/10529 cut-off events. [2025-03-09 01:24:32,715 INFO L125 PetriNetUnfolderBase]: For 975/975 co-relation queries the response was YES. [2025-03-09 01:24:32,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22805 conditions, 10529 events. 7303/10529 cut-off events. For 975/975 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 54908 event pairs, 6640 based on Foata normal form. 568/8282 useless extension candidates. Maximal degree in co-relation 20803. Up to 10498 conditions per place. [2025-03-09 01:24:32,750 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 55 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2025-03-09 01:24:32,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 320 flow [2025-03-09 01:24:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2025-03-09 01:24:32,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-09 01:24:32,751 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 228 flow. Second operand 4 states and 100 transitions. [2025-03-09 01:24:32,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 320 flow [2025-03-09 01:24:32,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 62 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:32,754 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 208 flow [2025-03-09 01:24:32,754 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2025-03-09 01:24:32,755 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2025-03-09 01:24:32,755 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 208 flow [2025-03-09 01:24:32,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:32,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:32,755 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:32,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-09 01:24:32,755 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:32,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:32,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1661825099, now seen corresponding path program 1 times [2025-03-09 01:24:32,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:32,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587505741] [2025-03-09 01:24:32,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:32,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:32,763 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-09 01:24:32,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:24:32,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:32,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:32,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:32,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587505741] [2025-03-09 01:24:32,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587505741] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:32,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:32,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:32,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525508577] [2025-03-09 01:24:32,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:32,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:32,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:32,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:32,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:32,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:32,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:32,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:32,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:32,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:33,222 INFO L124 PetriNetUnfolderBase]: 5967/8660 cut-off events. [2025-03-09 01:24:33,222 INFO L125 PetriNetUnfolderBase]: For 701/701 co-relation queries the response was YES. [2025-03-09 01:24:33,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18876 conditions, 8660 events. 5967/8660 cut-off events. For 701/701 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43087 event pairs, 2918 based on Foata normal form. 158/6460 useless extension candidates. Maximal degree in co-relation 16864. Up to 6301 conditions per place. [2025-03-09 01:24:33,245 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 84 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2025-03-09 01:24:33,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 449 flow [2025-03-09 01:24:33,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:33,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2025-03-09 01:24:33,246 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-03-09 01:24:33,246 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 208 flow. Second operand 3 states and 123 transitions. [2025-03-09 01:24:33,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 449 flow [2025-03-09 01:24:33,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 445 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:33,248 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 220 flow [2025-03-09 01:24:33,248 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2025-03-09 01:24:33,249 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -8 predicate places. [2025-03-09 01:24:33,249 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 220 flow [2025-03-09 01:24:33,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:33,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:33,249 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] [2025-03-09 01:24:33,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-09 01:24:33,249 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:33,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash -583170262, now seen corresponding path program 1 times [2025-03-09 01:24:33,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:33,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401378110] [2025-03-09 01:24:33,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:33,259 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:24:33,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:33,269 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:33,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:33,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:33,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401378110] [2025-03-09 01:24:33,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401378110] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:33,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:33,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:24:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772080916] [2025-03-09 01:24:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:33,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:33,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:33,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:33,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:33,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:33,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:33,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:33,894 INFO L124 PetriNetUnfolderBase]: 7310/10786 cut-off events. [2025-03-09 01:24:33,894 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2025-03-09 01:24:33,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24148 conditions, 10786 events. 7310/10786 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 57843 event pairs, 6726 based on Foata normal form. 20/8221 useless extension candidates. Maximal degree in co-relation 20186. Up to 8621 conditions per place. [2025-03-09 01:24:33,923 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 75 selfloop transitions, 7 changer transitions 5/91 dead transitions. [2025-03-09 01:24:33,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 91 transitions, 472 flow [2025-03-09 01:24:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2025-03-09 01:24:33,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2025-03-09 01:24:33,924 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 220 flow. Second operand 4 states and 134 transitions. [2025-03-09 01:24:33,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 91 transitions, 472 flow [2025-03-09 01:24:33,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:33,928 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 269 flow [2025-03-09 01:24:33,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2025-03-09 01:24:33,929 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2025-03-09 01:24:33,929 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 269 flow [2025-03-09 01:24:33,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:33,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:33,929 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:33,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-09 01:24:33,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:33,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:33,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1818110258, now seen corresponding path program 1 times [2025-03-09 01:24:33,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:33,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264157469] [2025-03-09 01:24:33,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:33,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:33,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-09 01:24:33,956 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:24:33,956 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:33,956 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:34,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264157469] [2025-03-09 01:24:34,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264157469] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:34,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:34,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:24:34,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954420142] [2025-03-09 01:24:34,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:34,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:34,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:34,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:34,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:34,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:34,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:34,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:34,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:34,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:34,884 INFO L124 PetriNetUnfolderBase]: 6469/9595 cut-off events. [2025-03-09 01:24:34,884 INFO L125 PetriNetUnfolderBase]: For 1121/1121 co-relation queries the response was YES. [2025-03-09 01:24:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21451 conditions, 9595 events. 6469/9595 cut-off events. For 1121/1121 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 51188 event pairs, 5958 based on Foata normal form. 0/7528 useless extension candidates. Maximal degree in co-relation 17478. Up to 9523 conditions per place. [2025-03-09 01:24:34,922 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 55 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-03-09 01:24:34,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 381 flow [2025-03-09 01:24:34,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-03-09 01:24:34,924 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2025-03-09 01:24:34,924 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 269 flow. Second operand 4 states and 104 transitions. [2025-03-09 01:24:34,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 381 flow [2025-03-09 01:24:34,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:34,927 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 263 flow [2025-03-09 01:24:34,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2025-03-09 01:24:34,928 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2025-03-09 01:24:34,928 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 263 flow [2025-03-09 01:24:34,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:34,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:34,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:34,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-09 01:24:34,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:34,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1125119489, now seen corresponding path program 1 times [2025-03-09 01:24:34,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:34,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105563836] [2025-03-09 01:24:34,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:34,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-09 01:24:34,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:24:34,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:34,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:35,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:35,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105563836] [2025-03-09 01:24:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105563836] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:35,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:35,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:24:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379572559] [2025-03-09 01:24:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:35,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:35,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:35,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:35,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:35,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:35,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:35,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:35,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:35,569 INFO L124 PetriNetUnfolderBase]: 5708/8520 cut-off events. [2025-03-09 01:24:35,569 INFO L125 PetriNetUnfolderBase]: For 1001/1001 co-relation queries the response was YES. [2025-03-09 01:24:35,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18743 conditions, 8520 events. 5708/8520 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 45146 event pairs, 5266 based on Foata normal form. 122/6930 useless extension candidates. Maximal degree in co-relation 14769. Up to 8448 conditions per place. [2025-03-09 01:24:35,598 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 54 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2025-03-09 01:24:35,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 371 flow [2025-03-09 01:24:35,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-03-09 01:24:35,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3 [2025-03-09 01:24:35,599 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 263 flow. Second operand 4 states and 90 transitions. [2025-03-09 01:24:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 371 flow [2025-03-09 01:24:35,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:35,602 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 256 flow [2025-03-09 01:24:35,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2025-03-09 01:24:35,603 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2025-03-09 01:24:35,603 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 256 flow [2025-03-09 01:24:35,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:35,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:35,603 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] [2025-03-09 01:24:35,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-09 01:24:35,604 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:35,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1091897980, now seen corresponding path program 1 times [2025-03-09 01:24:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:35,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119712220] [2025-03-09 01:24:35,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:35,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:35,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:24:35,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:24:35,627 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:35,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:24:35,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119712220] [2025-03-09 01:24:35,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119712220] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:35,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:35,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:24:35,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597705052] [2025-03-09 01:24:35,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:35,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:35,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:35,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:35,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:35,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:35,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:35,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:35,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:35,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:36,395 INFO L124 PetriNetUnfolderBase]: 8435/12846 cut-off events. [2025-03-09 01:24:36,396 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2025-03-09 01:24:36,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27776 conditions, 12846 events. 8435/12846 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 76316 event pairs, 7988 based on Foata normal form. 28/10380 useless extension candidates. Maximal degree in co-relation 19877. Up to 8465 conditions per place. [2025-03-09 01:24:36,430 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 81 selfloop transitions, 11 changer transitions 9/105 dead transitions. [2025-03-09 01:24:36,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 630 flow [2025-03-09 01:24:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2025-03-09 01:24:36,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4186666666666667 [2025-03-09 01:24:36,431 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 256 flow. Second operand 5 states and 157 transitions. [2025-03-09 01:24:36,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 630 flow [2025-03-09 01:24:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 622 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:36,434 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 363 flow [2025-03-09 01:24:36,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2025-03-09 01:24:36,434 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2025-03-09 01:24:36,435 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 363 flow [2025-03-09 01:24:36,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:36,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:36,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:36,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-09 01:24:36,435 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:36,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1469353505, now seen corresponding path program 1 times [2025-03-09 01:24:36,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:36,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980615079] [2025-03-09 01:24:36,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:36,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:24:36,452 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:24:36,452 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:36,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:24:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980615079] [2025-03-09 01:24:36,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980615079] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:36,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545336020] [2025-03-09 01:24:36,570 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:36,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:36,573 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) [2025-03-09 01:24:36,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:24:36,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-09 01:24:36,659 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-09 01:24:36,659 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:36,659 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:36,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:36,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:24:36,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:24:36,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545336020] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:36,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:24:36,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-03-09 01:24:36,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485559921] [2025-03-09 01:24:36,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:36,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:24:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:36,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:24:36,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:24:36,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:36,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 363 flow. Second operand has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:36,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:36,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:36,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:37,981 INFO L124 PetriNetUnfolderBase]: 11412/17549 cut-off events. [2025-03-09 01:24:37,981 INFO L125 PetriNetUnfolderBase]: For 1708/1708 co-relation queries the response was YES. [2025-03-09 01:24:38,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38161 conditions, 17549 events. 11412/17549 cut-off events. For 1708/1708 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 113035 event pairs, 8586 based on Foata normal form. 28/14179 useless extension candidates. Maximal degree in co-relation 28383. Up to 7636 conditions per place. [2025-03-09 01:24:38,055 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 104 selfloop transitions, 22 changer transitions 23/153 dead transitions. [2025-03-09 01:24:38,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 153 transitions, 980 flow [2025-03-09 01:24:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:24:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:24:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2025-03-09 01:24:38,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34424242424242424 [2025-03-09 01:24:38,056 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 363 flow. Second operand 11 states and 284 transitions. [2025-03-09 01:24:38,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 153 transitions, 980 flow [2025-03-09 01:24:38,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 976 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:38,063 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 557 flow [2025-03-09 01:24:38,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=557, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2025-03-09 01:24:38,064 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 14 predicate places. [2025-03-09 01:24:38,064 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 557 flow [2025-03-09 01:24:38,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.0) internal successors, (221), 13 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:38,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:38,064 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:38,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:24:38,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-09 01:24:38,265 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:38,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1475168879, now seen corresponding path program 1 times [2025-03-09 01:24:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147251975] [2025-03-09 01:24:38,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:38,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-09 01:24:38,278 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:24:38,278 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:38,278 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:38,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:38,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147251975] [2025-03-09 01:24:38,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147251975] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:38,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:38,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:38,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497072069] [2025-03-09 01:24:38,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:38,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:38,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:38,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:38,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:38,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:38,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 557 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:38,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:38,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:38,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:39,088 INFO L124 PetriNetUnfolderBase]: 10872/16689 cut-off events. [2025-03-09 01:24:39,088 INFO L125 PetriNetUnfolderBase]: For 2226/2226 co-relation queries the response was YES. [2025-03-09 01:24:39,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36926 conditions, 16689 events. 10872/16689 cut-off events. For 2226/2226 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 106169 event pairs, 9046 based on Foata normal form. 12/13323 useless extension candidates. Maximal degree in co-relation 26749. Up to 12142 conditions per place. [2025-03-09 01:24:39,143 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 60 selfloop transitions, 2 changer transitions 34/100 dead transitions. [2025-03-09 01:24:39,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 790 flow [2025-03-09 01:24:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2025-03-09 01:24:39,144 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-09 01:24:39,144 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 557 flow. Second operand 3 states and 105 transitions. [2025-03-09 01:24:39,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 790 flow [2025-03-09 01:24:39,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 757 flow, removed 13 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:39,152 INFO L231 Difference]: Finished difference. Result has 83 places, 57 transitions, 265 flow [2025-03-09 01:24:39,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=83, PETRI_TRANSITIONS=57} [2025-03-09 01:24:39,152 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2025-03-09 01:24:39,152 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 57 transitions, 265 flow [2025-03-09 01:24:39,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:39,153 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:39,153 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:39,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-09 01:24:39,153 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:39,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:39,153 INFO L85 PathProgramCache]: Analyzing trace with hash 791428440, now seen corresponding path program 2 times [2025-03-09 01:24:39,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:39,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445628483] [2025-03-09 01:24:39,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:39,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-09 01:24:39,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 20 of 28 statements. [2025-03-09 01:24:39,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:24:39,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:24:39,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:39,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445628483] [2025-03-09 01:24:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445628483] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:24:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37992648] [2025-03-09 01:24:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:39,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:39,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:39,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:39,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:39,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2025-03-09 01:24:39,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 57 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:39,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:39,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2025-03-09 01:24:39,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:39,910 INFO L124 PetriNetUnfolderBase]: 8273/11907 cut-off events. [2025-03-09 01:24:39,910 INFO L125 PetriNetUnfolderBase]: For 4017/4017 co-relation queries the response was YES. [2025-03-09 01:24:39,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29132 conditions, 11907 events. 8273/11907 cut-off events. For 4017/4017 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 58831 event pairs, 4313 based on Foata normal form. 204/9603 useless extension candidates. Maximal degree in co-relation 29074. Up to 4339 conditions per place. [2025-03-09 01:24:39,982 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 102 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2025-03-09 01:24:39,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 671 flow [2025-03-09 01:24:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:39,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2025-03-09 01:24:39,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2025-03-09 01:24:39,984 INFO L175 Difference]: Start difference. First operand has 83 places, 57 transitions, 265 flow. Second operand 4 states and 158 transitions. [2025-03-09 01:24:39,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 671 flow [2025-03-09 01:24:39,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 615 flow, removed 18 selfloop flow, removed 10 redundant places. [2025-03-09 01:24:39,999 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 296 flow [2025-03-09 01:24:40,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2025-03-09 01:24:40,000 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2025-03-09 01:24:40,000 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 296 flow [2025-03-09 01:24:40,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:40,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:40,000 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:40,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-09 01:24:40,001 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:40,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash -761586905, now seen corresponding path program 1 times [2025-03-09 01:24:40,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:40,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448778540] [2025-03-09 01:24:40,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:40,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:40,011 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 01:24:40,019 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 01:24:40,020 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:40,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:24:40,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:40,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448778540] [2025-03-09 01:24:40,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448778540] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:40,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:40,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:40,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84689331] [2025-03-09 01:24:40,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:40,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:40,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:40,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:40,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:40,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:40,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:40,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:40,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:40,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:40,717 INFO L124 PetriNetUnfolderBase]: 6674/9639 cut-off events. [2025-03-09 01:24:40,717 INFO L125 PetriNetUnfolderBase]: For 6701/6701 co-relation queries the response was YES. [2025-03-09 01:24:40,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24968 conditions, 9639 events. 6674/9639 cut-off events. For 6701/6701 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46313 event pairs, 5798 based on Foata normal form. 0/8055 useless extension candidates. Maximal degree in co-relation 24921. Up to 9608 conditions per place. [2025-03-09 01:24:40,743 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 54 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2025-03-09 01:24:40,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 61 transitions, 404 flow [2025-03-09 01:24:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2025-03-09 01:24:40,744 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.264 [2025-03-09 01:24:40,744 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 296 flow. Second operand 5 states and 99 transitions. [2025-03-09 01:24:40,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 61 transitions, 404 flow [2025-03-09 01:24:40,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 61 transitions, 390 flow, removed 7 selfloop flow, removed 0 redundant places. [2025-03-09 01:24:40,749 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 282 flow [2025-03-09 01:24:40,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2025-03-09 01:24:40,749 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2025-03-09 01:24:40,749 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 282 flow [2025-03-09 01:24:40,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:40,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:40,749 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:40,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-09 01:24:40,749 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:40,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash -761586904, now seen corresponding path program 1 times [2025-03-09 01:24:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:40,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855741851] [2025-03-09 01:24:40,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:40,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:40,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 01:24:40,771 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 01:24:40,771 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:40,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-09 01:24:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:41,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855741851] [2025-03-09 01:24:41,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855741851] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:41,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262608789] [2025-03-09 01:24:41,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:41,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:41,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:41,031 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) [2025-03-09 01:24:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:24:41,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 01:24:41,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 01:24:41,121 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:41,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:41,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 01:24:41,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:41,199 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 01:24:41,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-09 01:24:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:24:41,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:41,870 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 57 treesize of output 53 [2025-03-09 01:24:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:24:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262608789] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:41,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:24:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-09 01:24:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950940049] [2025-03-09 01:24:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:41,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:24:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:24:41,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:24:41,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:24:42,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2025-03-09 01:24:42,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 282 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:42,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:42,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2025-03-09 01:24:42,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:43,703 INFO L124 PetriNetUnfolderBase]: 6525/9702 cut-off events. [2025-03-09 01:24:43,703 INFO L125 PetriNetUnfolderBase]: For 5083/5083 co-relation queries the response was YES. [2025-03-09 01:24:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24182 conditions, 9702 events. 6525/9702 cut-off events. For 5083/5083 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 48948 event pairs, 5709 based on Foata normal form. 633/8962 useless extension candidates. Maximal degree in co-relation 24133. Up to 7595 conditions per place. [2025-03-09 01:24:43,737 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 14 changer transitions 43/106 dead transitions. [2025-03-09 01:24:43,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 106 transitions, 692 flow [2025-03-09 01:24:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-09 01:24:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-09 01:24:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 276 transitions. [2025-03-09 01:24:43,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2164705882352941 [2025-03-09 01:24:43,738 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 282 flow. Second operand 17 states and 276 transitions. [2025-03-09 01:24:43,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 106 transitions, 692 flow [2025-03-09 01:24:43,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 683 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:43,742 INFO L231 Difference]: Finished difference. Result has 90 places, 61 transitions, 323 flow [2025-03-09 01:24:43,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=323, PETRI_PLACES=90, PETRI_TRANSITIONS=61} [2025-03-09 01:24:43,743 INFO L279 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2025-03-09 01:24:43,743 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 61 transitions, 323 flow [2025-03-09 01:24:43,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:43,743 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:43,743 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:43,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:43,945 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,SelfDestructingSolverStorable15 [2025-03-09 01:24:43,945 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2025-03-09 01:24:43,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:43,945 INFO L85 PathProgramCache]: Analyzing trace with hash -903469441, now seen corresponding path program 1 times [2025-03-09 01:24:43,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:24:43,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174023295] [2025-03-09 01:24:43,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:43,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:24:43,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 01:24:44,038 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 01:24:44,038 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:44,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:24:46,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174023295] [2025-03-09 01:24:46,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174023295] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:46,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673582691] [2025-03-09 01:24:46,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:46,740 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) [2025-03-09 01:24:46,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:24:46,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-09 01:24:46,848 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-09 01:24:46,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:46,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:46,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 60 conjuncts are in the unsatisfiable core [2025-03-09 01:24:46,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:24:48,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:50,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:24:50,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 588 treesize of output 738 [2025-03-09 01:24:50,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:24:50,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 570 treesize of output 720