./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum2.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-more-array-sum2.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 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:25:51,198 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:25:51,254 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:25:51,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:25:51,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:25:51,276 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:25:51,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:25:51,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:25:51,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:25:51,278 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:25:51,279 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:25:51,279 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:25:51,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:25:51,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:25:51,280 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:25:51,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:25:51,280 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:25:51,281 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:25:51,282 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:25:51,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:25:51,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:25:51,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:25:51,283 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 -> 6d47c8696b49948f6f8f53dd9eda6f4e0281717fd9a29e264a19ded5493fa577 [2025-03-09 01:25:51,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:25:51,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:25:51,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:25:51,545 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:25:51,546 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:25:51,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2025-03-09 01:25:52,736 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/238934352/f9aa368c00904a3e8c096b61a1722598/FLAGb25c04077 [2025-03-09 01:25:52,965 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:25:52,966 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum2.wvr.c [2025-03-09 01:25:52,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/238934352/f9aa368c00904a3e8c096b61a1722598/FLAGb25c04077 [2025-03-09 01:25:52,984 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/238934352/f9aa368c00904a3e8c096b61a1722598 [2025-03-09 01:25:52,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:25:52,986 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:25:52,987 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:25:52,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:25:52,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:25:52,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:25:52" (1/1) ... [2025-03-09 01:25:52,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b19528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:52, skipping insertion in model container [2025-03-09 01:25:52,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:25:52" (1/1) ... [2025-03-09 01:25:53,005 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:25:53,145 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 01:25:53,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:25:53,166 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:25:53,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:25:53,206 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:25:53,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53 WrapperNode [2025-03-09 01:25:53,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:25:53,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:25:53,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:25:53,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:25:53,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,241 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 251 [2025-03-09 01:25:53,241 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:25:53,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:25:53,242 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:25:53,242 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:25:53,249 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,266 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-09 01:25:53,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,273 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:25:53,279 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:25:53,279 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:25:53,279 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:25:53,280 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (1/1) ... [2025-03-09 01:25:53,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:25:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:25:53,305 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 01:25:53,307 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 01:25:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:25:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:25:53,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:25:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:25:53,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:25:53,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-09 01:25:53,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:25:53,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:25:53,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:25:53,329 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 01:25:53,413 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:25:53,415 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:25:53,758 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:25:53,758 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:25:54,041 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:25:54,041 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:25:54,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:25:54 BoogieIcfgContainer [2025-03-09 01:25:54,042 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:25:54,043 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:25:54,044 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:25:54,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:25:54,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:25:52" (1/3) ... [2025-03-09 01:25:54,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc99b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:25:54, skipping insertion in model container [2025-03-09 01:25:54,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:25:53" (2/3) ... [2025-03-09 01:25:54,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc99b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:25:54, skipping insertion in model container [2025-03-09 01:25:54,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:25:54" (3/3) ... [2025-03-09 01:25:54,049 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2025-03-09 01:25:54,060 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:25:54,061 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum2.wvr.c that has 4 procedures, 51 locations, 1 initial locations, 5 loop locations, and 18 error locations. [2025-03-09 01:25:54,061 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:25:54,120 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-09 01:25:54,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 55 transitions, 131 flow [2025-03-09 01:25:54,168 INFO L124 PetriNetUnfolderBase]: 5/52 cut-off events. [2025-03-09 01:25:54,171 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-09 01:25:54,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 52 events. 5/52 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 115 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-09 01:25:54,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 55 transitions, 131 flow [2025-03-09 01:25:54,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 51 transitions, 120 flow [2025-03-09 01:25:54,183 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:25:54,195 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;@7b4927, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:25:54,195 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2025-03-09 01:25:54,199 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:25:54,199 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:25:54,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:25:54,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:54,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:25:54,200 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:54,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 804613, now seen corresponding path program 1 times [2025-03-09 01:25:54,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:54,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471515845] [2025-03-09 01:25:54,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:54,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:54,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:25:54,279 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:25:54,279 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:54,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:54,416 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 01:25:54,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:54,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471515845] [2025-03-09 01:25:54,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471515845] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:25:54,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:25:54,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:25:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790208836] [2025-03-09 01:25:54,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:25:54,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:25:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:54,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:25:54,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:25:54,457 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:25:54,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 01:25:54,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:54,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:25:54,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:54,985 INFO L124 PetriNetUnfolderBase]: 2971/4302 cut-off events. [2025-03-09 01:25:54,985 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2025-03-09 01:25:54,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8744 conditions, 4302 events. 2971/4302 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 25548 event pairs, 2534 based on Foata normal form. 1/2488 useless extension candidates. Maximal degree in co-relation 8225. Up to 4213 conditions per place. [2025-03-09 01:25:55,021 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2025-03-09 01:25:55,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 194 flow [2025-03-09 01:25:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:25:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:25:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-09 01:25:55,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2025-03-09 01:25:55,033 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 120 flow. Second operand 3 states and 74 transitions. [2025-03-09 01:25:55,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 194 flow [2025-03-09 01:25:55,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 01:25:55,053 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 104 flow [2025-03-09 01:25:55,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2025-03-09 01:25:55,059 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2025-03-09 01:25:55,059 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 104 flow [2025-03-09 01:25:55,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 01:25:55,060 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:55,060 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:25:55,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:25:55,061 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:55,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 804614, now seen corresponding path program 1 times [2025-03-09 01:25:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615992422] [2025-03-09 01:25:55,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:55,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:25:55,085 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:25:55,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:55,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:55,349 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 01:25:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615992422] [2025-03-09 01:25:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615992422] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:25:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:25:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:25:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023747380] [2025-03-09 01:25:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:25:55,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:25:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:55,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:25:55,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:25:55,363 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:25:55,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 01:25:55,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:55,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:25:55,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:55,802 INFO L124 PetriNetUnfolderBase]: 2972/4305 cut-off events. [2025-03-09 01:25:55,802 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:25:55,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8606 conditions, 4305 events. 2972/4305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 25538 event pairs, 2534 based on Foata normal form. 0/2488 useless extension candidates. Maximal degree in co-relation 8577. Up to 4222 conditions per place. [2025-03-09 01:25:55,836 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2025-03-09 01:25:55,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 202 flow [2025-03-09 01:25:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:25:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:25:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-03-09 01:25:55,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39545454545454545 [2025-03-09 01:25:55,841 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 104 flow. Second operand 4 states and 87 transitions. [2025-03-09 01:25:55,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 202 flow [2025-03-09 01:25:55,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:25:55,844 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 127 flow [2025-03-09 01:25:55,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2025-03-09 01:25:55,844 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2025-03-09 01:25:55,844 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 127 flow [2025-03-09 01:25:55,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 01:25:55,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:55,845 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-09 01:25:55,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:25:55,845 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:55,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 24945635, now seen corresponding path program 1 times [2025-03-09 01:25:55,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076074837] [2025-03-09 01:25:55,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:55,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-09 01:25:55,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-09 01:25:55,865 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:55,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:55,968 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 01:25:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:55,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076074837] [2025-03-09 01:25:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076074837] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:25:55,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:25:55,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:25:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090105488] [2025-03-09 01:25:55,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:25:55,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:25:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:55,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:25:55,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:25:55,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:25:55,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:25:55,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:55,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:25:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:56,326 INFO L124 PetriNetUnfolderBase]: 2971/4308 cut-off events. [2025-03-09 01:25:56,327 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:25:56,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8620 conditions, 4308 events. 2971/4308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 25558 event pairs, 2534 based on Foata normal form. 1/2494 useless extension candidates. Maximal degree in co-relation 8600. Up to 4219 conditions per place. [2025-03-09 01:25:56,351 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 41 selfloop transitions, 4 changer transitions 1/52 dead transitions. [2025-03-09 01:25:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 223 flow [2025-03-09 01:25:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:25:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:25:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2025-03-09 01:25:56,352 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2025-03-09 01:25:56,352 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 127 flow. Second operand 4 states and 97 transitions. [2025-03-09 01:25:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 223 flow [2025-03-09 01:25:56,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:25:56,353 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 142 flow [2025-03-09 01:25:56,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2025-03-09 01:25:56,354 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2025-03-09 01:25:56,354 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 142 flow [2025-03-09 01:25:56,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:25:56,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:56,355 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-09 01:25:56,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 01:25:56,355 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:56,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash 773259297, now seen corresponding path program 1 times [2025-03-09 01:25:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:56,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480408688] [2025-03-09 01:25:56,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:56,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:56,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:25:56,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:25:56,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:56,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:56,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:56,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480408688] [2025-03-09 01:25:56,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480408688] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:25:56,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915970339] [2025-03-09 01:25:56,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:56,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:25:56,573 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 01:25:56,574 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 01:25:56,615 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:25:56,624 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:25:56,624 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:56,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:56,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:25:56,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:25:56,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:25:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:56,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:25:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:56,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915970339] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:25:56,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:25:56,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-09 01:25:56,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030556146] [2025-03-09 01:25:56,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:25:56,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 01:25:56,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:56,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 01:25:56,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:25:56,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:25:56,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 142 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 01:25:56,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:56,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:25:56,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:57,382 INFO L124 PetriNetUnfolderBase]: 2971/4306 cut-off events. [2025-03-09 01:25:57,382 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:25:57,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 4306 events. 2971/4306 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 25484 event pairs, 2534 based on Foata normal form. 0/2493 useless extension candidates. Maximal degree in co-relation 8605. Up to 4220 conditions per place. [2025-03-09 01:25:57,400 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 39 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2025-03-09 01:25:57,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 228 flow [2025-03-09 01:25:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:25:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:25:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2025-03-09 01:25:57,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2025-03-09 01:25:57,401 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 142 flow. Second operand 6 states and 105 transitions. [2025-03-09 01:25:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 228 flow [2025-03-09 01:25:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 220 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-09 01:25:57,403 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 142 flow [2025-03-09 01:25:57,403 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2025-03-09 01:25:57,403 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2025-03-09 01:25:57,403 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 142 flow [2025-03-09 01:25:57,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 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 01:25:57,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:57,404 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:25:57,411 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 01:25:57,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:57,608 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:57,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:57,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1798762968, now seen corresponding path program 1 times [2025-03-09 01:25:57,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:57,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720066544] [2025-03-09 01:25:57,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:57,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:57,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:25:57,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:25:57,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:57,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:57,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720066544] [2025-03-09 01:25:57,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720066544] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:25:57,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706244618] [2025-03-09 01:25:57,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:57,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:25:57,781 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 01:25:57,783 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 01:25:57,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:25:57,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:25:57,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:57,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:57,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-09 01:25:57,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:25:57,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:25:57,943 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 01:25:57,943 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 32 treesize of output 27 [2025-03-09 01:25:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:57,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:25:58,027 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 01:25:58,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706244618] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:25:58,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:25:58,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2025-03-09 01:25:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017874160] [2025-03-09 01:25:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:25:58,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:25:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:58,028 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:25:58,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:25:58,055 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:25:58,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 01:25:58,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:58,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:25:58,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:58,452 INFO L124 PetriNetUnfolderBase]: 2971/4305 cut-off events. [2025-03-09 01:25:58,452 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-09 01:25:58,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8626 conditions, 4305 events. 2971/4305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 25612 event pairs, 2534 based on Foata normal form. 1/2493 useless extension candidates. Maximal degree in co-relation 8601. Up to 4219 conditions per place. [2025-03-09 01:25:58,471 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 42 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2025-03-09 01:25:58,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 50 transitions, 236 flow [2025-03-09 01:25:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:25:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:25:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-03-09 01:25:58,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527272727272727 [2025-03-09 01:25:58,473 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 142 flow. Second operand 5 states and 97 transitions. [2025-03-09 01:25:58,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 50 transitions, 236 flow [2025-03-09 01:25:58,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 210 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-09 01:25:58,475 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 128 flow [2025-03-09 01:25:58,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2025-03-09 01:25:58,476 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, -2 predicate places. [2025-03-09 01:25:58,476 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 128 flow [2025-03-09 01:25:58,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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 01:25:58,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:58,477 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-09 01:25:58,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:25:58,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:58,678 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:58,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:58,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2034333312, now seen corresponding path program 1 times [2025-03-09 01:25:58,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:58,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519092057] [2025-03-09 01:25:58,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:58,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:58,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:25:58,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:25:58,690 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:58,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:25:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519092057] [2025-03-09 01:25:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519092057] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:25:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211927568] [2025-03-09 01:25:58,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:58,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:58,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:25:58,798 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 01:25:58,799 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 01:25:58,844 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:25:58,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:25:58,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:58,857 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:25:58,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:25:58,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:25:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:58,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:25:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:25:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211927568] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:25:58,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:25:58,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-09 01:25:58,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794289108] [2025-03-09 01:25:58,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:25:58,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:25:58,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:25:58,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:25:58,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:25:58,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:25:58,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 128 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 01:25:58,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:58,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:25:58,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:59,610 INFO L124 PetriNetUnfolderBase]: 5941/8608 cut-off events. [2025-03-09 01:25:59,610 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-03-09 01:25:59,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 8608 events. 5941/8608 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 54682 event pairs, 5068 based on Foata normal form. 1/5056 useless extension candidates. Maximal degree in co-relation 8597. Up to 4217 conditions per place. [2025-03-09 01:25:59,642 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 74 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2025-03-09 01:25:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 414 flow [2025-03-09 01:25:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:25:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:25:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2025-03-09 01:25:59,644 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2025-03-09 01:25:59,644 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 128 flow. Second operand 8 states and 185 transitions. [2025-03-09 01:25:59,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 414 flow [2025-03-09 01:25:59,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 400 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:25:59,648 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 192 flow [2025-03-09 01:25:59,648 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2025-03-09 01:25:59,649 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2025-03-09 01:25:59,649 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 192 flow [2025-03-09 01:25:59,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 01:25:59,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:59,650 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-03-09 01:25:59,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:25:59,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:59,851 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:25:59,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1838303557, now seen corresponding path program 2 times [2025-03-09 01:25:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:25:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286170984] [2025-03-09 01:25:59,851 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:25:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:25:59,858 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-09 01:25:59,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:25:59,873 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:25:59,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-09 01:26:00,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286170984] [2025-03-09 01:26:00,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286170984] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:00,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696800549] [2025-03-09 01:26:00,068 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:00,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:00,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:00,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:26:00,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-09 01:26:00,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:26:00,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:00,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:00,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-03-09 01:26:00,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:00,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:26:00,236 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 01:26:00,237 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 32 treesize of output 27 [2025-03-09 01:26:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:00,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696800549] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:00,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2025-03-09 01:26:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752767487] [2025-03-09 01:26:00,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:00,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:26:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:00,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:26:00,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:26:00,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:00,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 192 flow. Second operand has 16 states, 16 states have (on average 11.75) internal successors, (188), 16 states have internal predecessors, (188), 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 01:26:00,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:00,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:00,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:01,586 INFO L124 PetriNetUnfolderBase]: 5940/8605 cut-off events. [2025-03-09 01:26:01,586 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2025-03-09 01:26:01,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17235 conditions, 8605 events. 5940/8605 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 53911 event pairs, 5068 based on Foata normal form. 3/5055 useless extension candidates. Maximal degree in co-relation 8597. Up to 4213 conditions per place. [2025-03-09 01:26:01,626 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 70 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2025-03-09 01:26:01,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 91 transitions, 442 flow [2025-03-09 01:26:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:26:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:26:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2025-03-09 01:26:01,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2025-03-09 01:26:01,630 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 192 flow. Second operand 10 states and 190 transitions. [2025-03-09 01:26:01,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 91 transitions, 442 flow [2025-03-09 01:26:01,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 424 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:01,632 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 210 flow [2025-03-09 01:26:01,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2025-03-09 01:26:01,634 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2025-03-09 01:26:01,634 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 210 flow [2025-03-09 01:26:01,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.75) internal successors, (188), 16 states have internal predecessors, (188), 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 01:26:01,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:01,634 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:01,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:26:01,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:01,835 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:01,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1463906377, now seen corresponding path program 1 times [2025-03-09 01:26:01,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494119430] [2025-03-09 01:26:01,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:01,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:01,841 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:01,850 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:01,850 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:01,850 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:02,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494119430] [2025-03-09 01:26:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494119430] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:02,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5411605] [2025-03-09 01:26:02,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:02,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:02,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:02,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:26:02,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:02,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:02,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:02,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:02,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 01:26:02,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:02,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:26:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:02,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:26:02,118 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 01:26:02,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 01:26:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:02,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:02,231 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 52 treesize of output 48 [2025-03-09 01:26:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5411605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:02,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:02,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-09 01:26:02,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386152009] [2025-03-09 01:26:02,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:02,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:26:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:02,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:26:02,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:26:02,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:02,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 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 01:26:02,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:02,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:02,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:03,325 INFO L124 PetriNetUnfolderBase]: 9772/13989 cut-off events. [2025-03-09 01:26:03,325 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-03-09 01:26:03,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28013 conditions, 13989 events. 9772/13989 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 88879 event pairs, 3078 based on Foata normal form. 0/8179 useless extension candidates. Maximal degree in co-relation 13977. Up to 5716 conditions per place. [2025-03-09 01:26:03,379 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 86 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2025-03-09 01:26:03,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 520 flow [2025-03-09 01:26:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:26:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:26:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2025-03-09 01:26:03,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3717171717171717 [2025-03-09 01:26:03,381 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 210 flow. Second operand 9 states and 184 transitions. [2025-03-09 01:26:03,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 520 flow [2025-03-09 01:26:03,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 490 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-03-09 01:26:03,382 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 242 flow [2025-03-09 01:26:03,383 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2025-03-09 01:26:03,383 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2025-03-09 01:26:03,383 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 242 flow [2025-03-09 01:26:03,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.0) internal successors, (156), 13 states have internal predecessors, (156), 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 01:26:03,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:03,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:03,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:03,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:03,588 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:03,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1463906378, now seen corresponding path program 1 times [2025-03-09 01:26:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:03,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681284213] [2025-03-09 01:26:03,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:03,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:03,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:03,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:03,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:03,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681284213] [2025-03-09 01:26:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681284213] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:03,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:03,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249190314] [2025-03-09 01:26:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:03,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:03,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:03,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:03,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:03,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 01:26:03,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:03,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:03,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:04,300 INFO L124 PetriNetUnfolderBase]: 6492/9363 cut-off events. [2025-03-09 01:26:04,300 INFO L125 PetriNetUnfolderBase]: For 3461/3461 co-relation queries the response was YES. [2025-03-09 01:26:04,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22143 conditions, 9363 events. 6492/9363 cut-off events. For 3461/3461 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 58073 event pairs, 5344 based on Foata normal form. 0/6667 useless extension candidates. Maximal degree in co-relation 11059. Up to 9116 conditions per place. [2025-03-09 01:26:04,333 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 50 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2025-03-09 01:26:04,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 335 flow [2025-03-09 01:26:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:26:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:26:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2025-03-09 01:26:04,338 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2025-03-09 01:26:04,339 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 242 flow. Second operand 4 states and 81 transitions. [2025-03-09 01:26:04,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 335 flow [2025-03-09 01:26:04,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 325 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:26:04,342 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 225 flow [2025-03-09 01:26:04,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2025-03-09 01:26:04,343 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2025-03-09 01:26:04,343 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 225 flow [2025-03-09 01:26:04,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 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 01:26:04,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:04,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:04,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-09 01:26:04,344 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:04,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1463906379, now seen corresponding path program 1 times [2025-03-09 01:26:04,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:04,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577892630] [2025-03-09 01:26:04,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:04,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:04,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:04,355 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:04,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:04,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:04,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577892630] [2025-03-09 01:26:04,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577892630] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:04,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664086198] [2025-03-09 01:26:04,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:04,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:04,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:04,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:04,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:26:04,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:04,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:04,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:04,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:04,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:26:04,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:04,597 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:04,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-09 01:26:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:04,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664086198] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:04,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:04,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-03-09 01:26:04,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033539678] [2025-03-09 01:26:04,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:04,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-09 01:26:04,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:04,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-09 01:26:04,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:26:04,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:04,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 225 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:04,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:04,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:04,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:05,360 INFO L124 PetriNetUnfolderBase]: 5942/8593 cut-off events. [2025-03-09 01:26:05,360 INFO L125 PetriNetUnfolderBase]: For 2597/2597 co-relation queries the response was YES. [2025-03-09 01:26:05,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20350 conditions, 8593 events. 5942/8593 cut-off events. For 2597/2597 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 51836 event pairs, 2118 based on Foata normal form. 0/6372 useless extension candidates. Maximal degree in co-relation 10162. Up to 5226 conditions per place. [2025-03-09 01:26:05,387 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 79 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2025-03-09 01:26:05,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 495 flow [2025-03-09 01:26:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:26:05,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:26:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2025-03-09 01:26:05,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43896103896103894 [2025-03-09 01:26:05,388 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 225 flow. Second operand 7 states and 169 transitions. [2025-03-09 01:26:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 495 flow [2025-03-09 01:26:05,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 491 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:05,391 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 243 flow [2025-03-09 01:26:05,392 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2025-03-09 01:26:05,394 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2025-03-09 01:26:05,394 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 243 flow [2025-03-09 01:26:05,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:05,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:05,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:05,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-09 01:26:05,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:05,594 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:05,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:05,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1463906376, now seen corresponding path program 1 times [2025-03-09 01:26:05,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:05,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863559356] [2025-03-09 01:26:05,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:05,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-09 01:26:05,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:26:05,607 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:05,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-09 01:26:05,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:05,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863559356] [2025-03-09 01:26:05,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863559356] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:05,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:05,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-09 01:26:05,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316362126] [2025-03-09 01:26:05,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:05,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:26:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:05,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:26:05,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:26:05,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:05,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 01:26:05,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:05,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:05,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:05,964 INFO L124 PetriNetUnfolderBase]: 3628/5267 cut-off events. [2025-03-09 01:26:05,964 INFO L125 PetriNetUnfolderBase]: For 5027/5027 co-relation queries the response was YES. [2025-03-09 01:26:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13813 conditions, 5267 events. 3628/5267 cut-off events. For 5027/5027 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29270 event pairs, 2840 based on Foata normal form. 342/4619 useless extension candidates. Maximal degree in co-relation 6894. Up to 5092 conditions per place. [2025-03-09 01:26:05,983 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 44 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2025-03-09 01:26:05,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 53 transitions, 335 flow [2025-03-09 01:26:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:05,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-03-09 01:26:05,984 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32 [2025-03-09 01:26:05,984 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 243 flow. Second operand 5 states and 88 transitions. [2025-03-09 01:26:05,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 53 transitions, 335 flow [2025-03-09 01:26:05,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 308 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:05,987 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 220 flow [2025-03-09 01:26:05,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2025-03-09 01:26:05,988 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2025-03-09 01:26:05,988 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 220 flow [2025-03-09 01:26:05,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 01:26:05,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:05,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:05,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-09 01:26:05,988 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:05,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1943585686, now seen corresponding path program 1 times [2025-03-09 01:26:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:05,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802716587] [2025-03-09 01:26:05,989 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:05,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:26:06,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:26:06,004 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:06,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:06,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802716587] [2025-03-09 01:26:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802716587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671866210] [2025-03-09 01:26:06,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:06,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:06,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:26:06,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-09 01:26:06,142 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-09 01:26:06,142 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:06,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:06,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:26:06,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:06,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671866210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:06,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-09 01:26:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301280792] [2025-03-09 01:26:06,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:06,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:26:06,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:06,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:26:06,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:26:06,300 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:06,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 220 flow. Second operand has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 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 01:26:06,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:06,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:06,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:06,680 INFO L124 PetriNetUnfolderBase]: 2914/4275 cut-off events. [2025-03-09 01:26:06,680 INFO L125 PetriNetUnfolderBase]: For 2286/2286 co-relation queries the response was YES. [2025-03-09 01:26:06,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 4275 events. 2914/4275 cut-off events. For 2286/2286 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22057 event pairs, 2027 based on Foata normal form. 0/3432 useless extension candidates. Maximal degree in co-relation 7376. Up to 2967 conditions per place. [2025-03-09 01:26:06,696 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 82 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2025-03-09 01:26:06,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 100 transitions, 574 flow [2025-03-09 01:26:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:26:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:26:06,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2025-03-09 01:26:06,697 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3797979797979798 [2025-03-09 01:26:06,697 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 220 flow. Second operand 9 states and 188 transitions. [2025-03-09 01:26:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 100 transitions, 574 flow [2025-03-09 01:26:06,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 566 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:26:06,700 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 257 flow [2025-03-09 01:26:06,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=257, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2025-03-09 01:26:06,700 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2025-03-09 01:26:06,700 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 257 flow [2025-03-09 01:26:06,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.071428571428571) internal successors, (183), 14 states have internal predecessors, (183), 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 01:26:06,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:06,700 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:06,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 01:26:06,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:06,905 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:06,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 137834196, now seen corresponding path program 1 times [2025-03-09 01:26:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998527360] [2025-03-09 01:26:06,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:06,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:26:06,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:26:06,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:06,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998527360] [2025-03-09 01:26:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998527360] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943486762] [2025-03-09 01:26:06,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:06,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:07,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:26:07,047 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:26:07,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:26:07,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:07,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:07,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:26:07,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:07,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:07,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943486762] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:07,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:07,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-09 01:26:07,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542596498] [2025-03-09 01:26:07,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:07,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:26:07,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:07,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:26:07,172 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:26:07,232 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:07,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 257 flow. Second operand has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 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 01:26:07,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:07,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:07,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:07,684 INFO L124 PetriNetUnfolderBase]: 2804/4117 cut-off events. [2025-03-09 01:26:07,685 INFO L125 PetriNetUnfolderBase]: For 2012/2149 co-relation queries the response was YES. [2025-03-09 01:26:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10418 conditions, 4117 events. 2804/4117 cut-off events. For 2012/2149 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21321 event pairs, 1937 based on Foata normal form. 44/3443 useless extension candidates. Maximal degree in co-relation 7851. Up to 3135 conditions per place. [2025-03-09 01:26:07,698 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 84 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2025-03-09 01:26:07,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 605 flow [2025-03-09 01:26:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:26:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:26:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2025-03-09 01:26:07,703 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2025-03-09 01:26:07,703 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 257 flow. Second operand 10 states and 209 transitions. [2025-03-09 01:26:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 605 flow [2025-03-09 01:26:07,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 104 transitions, 580 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:07,708 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 307 flow [2025-03-09 01:26:07,709 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2025-03-09 01:26:07,709 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2025-03-09 01:26:07,709 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 307 flow [2025-03-09 01:26:07,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.214285714285714) internal successors, (185), 14 states have internal predecessors, (185), 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 01:26:07,710 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:07,710 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:07,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 01:26:07,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-09 01:26:07,911 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:07,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 482090929, now seen corresponding path program 1 times [2025-03-09 01:26:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468578448] [2025-03-09 01:26:07,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:07,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:26:07,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:26:07,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:07,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468578448] [2025-03-09 01:26:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468578448] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:08,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:08,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:26:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271313462] [2025-03-09 01:26:08,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:08,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-09 01:26:08,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:08,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-09 01:26:08,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-09 01:26:08,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:08,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:08,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:08,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:08,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:08,461 INFO L124 PetriNetUnfolderBase]: 2912/4328 cut-off events. [2025-03-09 01:26:08,461 INFO L125 PetriNetUnfolderBase]: For 4835/4958 co-relation queries the response was YES. [2025-03-09 01:26:08,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11711 conditions, 4328 events. 2912/4328 cut-off events. For 4835/4958 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22461 event pairs, 1251 based on Foata normal form. 0/3545 useless extension candidates. Maximal degree in co-relation 8574. Up to 2334 conditions per place. [2025-03-09 01:26:08,477 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 72 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2025-03-09 01:26:08,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 86 transitions, 603 flow [2025-03-09 01:26:08,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:26:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:26:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-03-09 01:26:08,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2025-03-09 01:26:08,478 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 307 flow. Second operand 6 states and 114 transitions. [2025-03-09 01:26:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 86 transitions, 603 flow [2025-03-09 01:26:08,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 574 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:08,482 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 326 flow [2025-03-09 01:26:08,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=326, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2025-03-09 01:26:08,482 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2025-03-09 01:26:08,482 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 326 flow [2025-03-09 01:26:08,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:08,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:08,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:08,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-09 01:26:08,483 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:08,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:08,483 INFO L85 PathProgramCache]: Analyzing trace with hash 482090931, now seen corresponding path program 1 times [2025-03-09 01:26:08,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:08,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839643107] [2025-03-09 01:26:08,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:08,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:08,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:26:08,493 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:26:08,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:08,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839643107] [2025-03-09 01:26:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839643107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371764902] [2025-03-09 01:26:08,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:08,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:08,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:08,635 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:08,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:26:08,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-09 01:26:08,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-09 01:26:08,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:08,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:08,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 01:26:08,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:08,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:08,928 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 36 treesize of output 32 [2025-03-09 01:26:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371764902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:09,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:09,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-03-09 01:26:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602630821] [2025-03-09 01:26:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:09,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 01:26:09,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:09,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 01:26:09,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2025-03-09 01:26:09,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:09,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 326 flow. Second operand has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 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 01:26:09,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:09,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:09,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:10,067 INFO L124 PetriNetUnfolderBase]: 2986/4466 cut-off events. [2025-03-09 01:26:10,068 INFO L125 PetriNetUnfolderBase]: For 6761/6973 co-relation queries the response was YES. [2025-03-09 01:26:10,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14068 conditions, 4466 events. 2986/4466 cut-off events. For 6761/6973 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23740 event pairs, 1764 based on Foata normal form. 0/3852 useless extension candidates. Maximal degree in co-relation 9917. Up to 2652 conditions per place. [2025-03-09 01:26:10,089 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 107 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2025-03-09 01:26:10,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 133 transitions, 931 flow [2025-03-09 01:26:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-09 01:26:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-09 01:26:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 321 transitions. [2025-03-09 01:26:10,091 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3433155080213904 [2025-03-09 01:26:10,091 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 326 flow. Second operand 17 states and 321 transitions. [2025-03-09 01:26:10,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 133 transitions, 931 flow [2025-03-09 01:26:10,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 923 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:26:10,102 INFO L231 Difference]: Finished difference. Result has 96 places, 68 transitions, 419 flow [2025-03-09 01:26:10,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=419, PETRI_PLACES=96, PETRI_TRANSITIONS=68} [2025-03-09 01:26:10,103 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2025-03-09 01:26:10,103 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 68 transitions, 419 flow [2025-03-09 01:26:10,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.1) internal successors, (282), 20 states have internal predecessors, (282), 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 01:26:10,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:10,104 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:10,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-09 01:26:10,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-09 01:26:10,304 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:10,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:10,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1726499155, now seen corresponding path program 2 times [2025-03-09 01:26:10,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:10,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524428947] [2025-03-09 01:26:10,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:10,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-09 01:26:10,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:26:10,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:10,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524428947] [2025-03-09 01:26:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524428947] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:10,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410926535] [2025-03-09 01:26:10,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:10,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:10,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:10,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:26:10,643 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-09 01:26:10,674 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:26:10,675 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:10,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:10,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 01:26:10,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:10,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:26:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:10,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:26:10,758 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 01:26:10,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 01:26:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:10,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:10,937 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 52 treesize of output 48 [2025-03-09 01:26:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410926535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:11,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2025-03-09 01:26:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813922432] [2025-03-09 01:26:11,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:11,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-09 01:26:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:11,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-09 01:26:11,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-03-09 01:26:11,305 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:11,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 68 transitions, 419 flow. Second operand has 17 states, 17 states have (on average 12.294117647058824) internal successors, (209), 17 states have internal predecessors, (209), 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 01:26:11,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:11,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:11,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:12,597 INFO L124 PetriNetUnfolderBase]: 4895/7112 cut-off events. [2025-03-09 01:26:12,597 INFO L125 PetriNetUnfolderBase]: For 14076/14354 co-relation queries the response was YES. [2025-03-09 01:26:12,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23496 conditions, 7112 events. 4895/7112 cut-off events. For 14076/14354 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 37520 event pairs, 1363 based on Foata normal form. 0/6403 useless extension candidates. Maximal degree in co-relation 19005. Up to 2233 conditions per place. [2025-03-09 01:26:12,623 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 129 selfloop transitions, 19 changer transitions 0/152 dead transitions. [2025-03-09 01:26:12,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1148 flow [2025-03-09 01:26:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:26:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-09 01:26:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 274 transitions. [2025-03-09 01:26:12,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3321212121212121 [2025-03-09 01:26:12,625 INFO L175 Difference]: Start difference. First operand has 96 places, 68 transitions, 419 flow. Second operand 15 states and 274 transitions. [2025-03-09 01:26:12,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1148 flow [2025-03-09 01:26:12,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1123 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-09 01:26:12,635 INFO L231 Difference]: Finished difference. Result has 105 places, 73 transitions, 471 flow [2025-03-09 01:26:12,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=471, PETRI_PLACES=105, PETRI_TRANSITIONS=73} [2025-03-09 01:26:12,635 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2025-03-09 01:26:12,635 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 73 transitions, 471 flow [2025-03-09 01:26:12,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.294117647058824) internal successors, (209), 17 states have internal predecessors, (209), 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 01:26:12,635 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:12,636 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:12,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:26:12,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-09 01:26:12,836 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:12,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:12,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1726499153, now seen corresponding path program 1 times [2025-03-09 01:26:12,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:12,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085866516] [2025-03-09 01:26:12,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:12,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:12,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-09 01:26:12,849 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:26:12,849 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:12,849 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:26:13,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085866516] [2025-03-09 01:26:13,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085866516] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:13,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011816562] [2025-03-09 01:26:13,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:13,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:13,050 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:13,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:26:13,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-09 01:26:13,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-09 01:26:13,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:13,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:13,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 01:26:13,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-09 01:26:13,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:13,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-09 01:26:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-09 01:26:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011816562] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:13,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2025-03-09 01:26:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221683911] [2025-03-09 01:26:13,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:13,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:26:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:13,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:26:13,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:26:13,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:13,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 73 transitions, 471 flow. Second operand has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 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 01:26:13,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:13,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:13,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:14,418 INFO L124 PetriNetUnfolderBase]: 4384/6494 cut-off events. [2025-03-09 01:26:14,418 INFO L125 PetriNetUnfolderBase]: For 15394/15649 co-relation queries the response was YES. [2025-03-09 01:26:14,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24369 conditions, 6494 events. 4384/6494 cut-off events. For 15394/15649 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 34911 event pairs, 1723 based on Foata normal form. 0/6200 useless extension candidates. Maximal degree in co-relation 19670. Up to 2744 conditions per place. [2025-03-09 01:26:14,459 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 127 selfloop transitions, 19 changer transitions 0/150 dead transitions. [2025-03-09 01:26:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1178 flow [2025-03-09 01:26:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:26:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:26:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2025-03-09 01:26:14,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37662337662337664 [2025-03-09 01:26:14,461 INFO L175 Difference]: Start difference. First operand has 105 places, 73 transitions, 471 flow. Second operand 14 states and 290 transitions. [2025-03-09 01:26:14,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1178 flow [2025-03-09 01:26:14,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1148 flow, removed 1 selfloop flow, removed 12 redundant places. [2025-03-09 01:26:14,486 INFO L231 Difference]: Finished difference. Result has 106 places, 72 transitions, 475 flow [2025-03-09 01:26:14,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=475, PETRI_PLACES=106, PETRI_TRANSITIONS=72} [2025-03-09 01:26:14,486 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2025-03-09 01:26:14,486 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 72 transitions, 475 flow [2025-03-09 01:26:14,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.166666666666666) internal successors, (255), 18 states have internal predecessors, (255), 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 01:26:14,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:14,487 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:14,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:26:14,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-09 01:26:14,687 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:14,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -398873538, now seen corresponding path program 1 times [2025-03-09 01:26:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631954622] [2025-03-09 01:26:14,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:14,694 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:26:14,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:14,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:14,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631954622] [2025-03-09 01:26:14,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631954622] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:14,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274085091] [2025-03-09 01:26:14,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:14,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:14,766 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:14,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:26:14,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:26:14,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:14,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:14,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:14,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:26:14,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:14,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274085091] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:14,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-09 01:26:14,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393749597] [2025-03-09 01:26:14,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:14,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-09 01:26:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:14,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-09 01:26:14,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2025-03-09 01:26:15,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 72 transitions, 475 flow. Second operand has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 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 01:26:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:15,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:15,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:15,580 INFO L124 PetriNetUnfolderBase]: 5070/7171 cut-off events. [2025-03-09 01:26:15,580 INFO L125 PetriNetUnfolderBase]: For 20643/21078 co-relation queries the response was YES. [2025-03-09 01:26:15,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27430 conditions, 7171 events. 5070/7171 cut-off events. For 20643/21078 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 34939 event pairs, 3425 based on Foata normal form. 34/7016 useless extension candidates. Maximal degree in co-relation 24002. Up to 6098 conditions per place. [2025-03-09 01:26:15,618 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 84 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2025-03-09 01:26:15,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 827 flow [2025-03-09 01:26:15,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:26:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:26:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2025-03-09 01:26:15,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3618181818181818 [2025-03-09 01:26:15,619 INFO L175 Difference]: Start difference. First operand has 106 places, 72 transitions, 475 flow. Second operand 10 states and 199 transitions. [2025-03-09 01:26:15,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 827 flow [2025-03-09 01:26:15,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 774 flow, removed 0 selfloop flow, removed 14 redundant places. [2025-03-09 01:26:15,632 INFO L231 Difference]: Finished difference. Result has 101 places, 71 transitions, 456 flow [2025-03-09 01:26:15,632 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=101, PETRI_TRANSITIONS=71} [2025-03-09 01:26:15,632 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2025-03-09 01:26:15,632 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 71 transitions, 456 flow [2025-03-09 01:26:15,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.466666666666667) internal successors, (202), 15 states have internal predecessors, (202), 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 01:26:15,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:15,632 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:15,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:15,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-09 01:26:15,833 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:15,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1722417935, now seen corresponding path program 2 times [2025-03-09 01:26:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:15,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509009192] [2025-03-09 01:26:15,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:15,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:26:15,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:15,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:15,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:16,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509009192] [2025-03-09 01:26:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509009192] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:16,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292491960] [2025-03-09 01:26:16,001 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:16,004 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:16,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:26:16,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-03-09 01:26:16,069 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:16,069 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:16,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:16,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-09 01:26:16,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:16,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:26:16,131 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 01:26:16,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 01:26:16,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-09 01:26:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:16,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:16,345 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 52 treesize of output 48 [2025-03-09 01:26:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292491960] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:16,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:16,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2025-03-09 01:26:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229656955] [2025-03-09 01:26:16,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:16,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 01:26:16,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:16,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 01:26:16,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2025-03-09 01:26:16,749 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2025-03-09 01:26:16,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 71 transitions, 456 flow. Second operand has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 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 01:26:16,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:16,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2025-03-09 01:26:16,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:18,252 INFO L124 PetriNetUnfolderBase]: 6472/8873 cut-off events. [2025-03-09 01:26:18,252 INFO L125 PetriNetUnfolderBase]: For 22064/22821 co-relation queries the response was YES. [2025-03-09 01:26:18,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33530 conditions, 8873 events. 6472/8873 cut-off events. For 22064/22821 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 43588 event pairs, 766 based on Foata normal form. 292/8655 useless extension candidates. Maximal degree in co-relation 29954. Up to 2268 conditions per place. [2025-03-09 01:26:18,295 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 195 selfloop transitions, 23 changer transitions 0/221 dead transitions. [2025-03-09 01:26:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 221 transitions, 1715 flow [2025-03-09 01:26:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-09 01:26:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-09 01:26:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 352 transitions. [2025-03-09 01:26:18,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3368421052631579 [2025-03-09 01:26:18,297 INFO L175 Difference]: Start difference. First operand has 101 places, 71 transitions, 456 flow. Second operand 19 states and 352 transitions. [2025-03-09 01:26:18,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 221 transitions, 1715 flow [2025-03-09 01:26:18,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 221 transitions, 1670 flow, removed 4 selfloop flow, removed 7 redundant places. [2025-03-09 01:26:18,314 INFO L231 Difference]: Finished difference. Result has 113 places, 74 transitions, 498 flow [2025-03-09 01:26:18,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=498, PETRI_PLACES=113, PETRI_TRANSITIONS=74} [2025-03-09 01:26:18,315 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2025-03-09 01:26:18,315 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 74 transitions, 498 flow [2025-03-09 01:26:18,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 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 01:26:18,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:18,315 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:18,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 01:26:18,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:18,516 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:18,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:18,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1722417933, now seen corresponding path program 1 times [2025-03-09 01:26:18,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:18,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459915536] [2025-03-09 01:26:18,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:18,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:18,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:26:18,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:18,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:18,527 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:26:18,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459915536] [2025-03-09 01:26:18,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459915536] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244487549] [2025-03-09 01:26:18,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:18,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:26:18,753 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-09 01:26:18,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:26:18,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:18,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:18,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 01:26:18,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-09 01:26:18,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:18,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-09 01:26:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-09 01:26:18,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244487549] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:18,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:18,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2025-03-09 01:26:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121087987] [2025-03-09 01:26:18,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:18,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-09 01:26:18,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:18,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-09 01:26:18,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2025-03-09 01:26:19,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 74 transitions, 498 flow. Second operand has 22 states, 22 states have (on average 13.818181818181818) internal successors, (304), 22 states have internal predecessors, (304), 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 01:26:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:19,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:19,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:20,328 INFO L124 PetriNetUnfolderBase]: 4704/6858 cut-off events. [2025-03-09 01:26:20,329 INFO L125 PetriNetUnfolderBase]: For 20882/21352 co-relation queries the response was YES. [2025-03-09 01:26:20,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27380 conditions, 6858 events. 4704/6858 cut-off events. For 20882/21352 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 34755 event pairs, 1382 based on Foata normal form. 0/6548 useless extension candidates. Maximal degree in co-relation 24085. Up to 2801 conditions per place. [2025-03-09 01:26:20,356 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 145 selfloop transitions, 20 changer transitions 0/171 dead transitions. [2025-03-09 01:26:20,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 171 transitions, 1345 flow [2025-03-09 01:26:20,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:26:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:26:20,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 303 transitions. [2025-03-09 01:26:20,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3935064935064935 [2025-03-09 01:26:20,357 INFO L175 Difference]: Start difference. First operand has 113 places, 74 transitions, 498 flow. Second operand 14 states and 303 transitions. [2025-03-09 01:26:20,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 171 transitions, 1345 flow [2025-03-09 01:26:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 171 transitions, 1283 flow, removed 8 selfloop flow, removed 16 redundant places. [2025-03-09 01:26:20,372 INFO L231 Difference]: Finished difference. Result has 113 places, 76 transitions, 505 flow [2025-03-09 01:26:20,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=505, PETRI_PLACES=113, PETRI_TRANSITIONS=76} [2025-03-09 01:26:20,372 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2025-03-09 01:26:20,372 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 76 transitions, 505 flow [2025-03-09 01:26:20,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.818181818181818) internal successors, (304), 22 states have internal predecessors, (304), 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 01:26:20,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:20,372 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:20,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:20,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:20,573 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:20,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:20,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1351150282, now seen corresponding path program 2 times [2025-03-09 01:26:20,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:20,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99531843] [2025-03-09 01:26:20,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:20,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:20,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-09 01:26:20,589 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:26:20,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:20,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-09 01:26:20,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:20,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99531843] [2025-03-09 01:26:20,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99531843] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:20,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5095349] [2025-03-09 01:26:20,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:20,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:20,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:20,704 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:20,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:26:20,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-03-09 01:26:20,780 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-03-09 01:26:20,781 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:20,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:20,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-09 01:26:20,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:20,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:21,048 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 36 treesize of output 32 [2025-03-09 01:26:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5095349] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:21,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:21,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 23 [2025-03-09 01:26:21,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965552971] [2025-03-09 01:26:21,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:21,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 01:26:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:21,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 01:26:21,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2025-03-09 01:26:21,378 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:21,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 76 transitions, 505 flow. Second operand has 24 states, 24 states have (on average 13.208333333333334) internal successors, (317), 24 states have internal predecessors, (317), 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 01:26:21,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:21,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:21,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:23,524 INFO L124 PetriNetUnfolderBase]: 14253/19714 cut-off events. [2025-03-09 01:26:23,524 INFO L125 PetriNetUnfolderBase]: For 68976/70651 co-relation queries the response was YES. [2025-03-09 01:26:23,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79903 conditions, 19714 events. 14253/19714 cut-off events. For 68976/70651 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 108794 event pairs, 2935 based on Foata normal form. 1032/20230 useless extension candidates. Maximal degree in co-relation 68388. Up to 3522 conditions per place. [2025-03-09 01:26:23,680 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 281 selfloop transitions, 42 changer transitions 0/328 dead transitions. [2025-03-09 01:26:23,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 328 transitions, 2820 flow [2025-03-09 01:26:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-09 01:26:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-09 01:26:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 491 transitions. [2025-03-09 01:26:23,682 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34335664335664334 [2025-03-09 01:26:23,682 INFO L175 Difference]: Start difference. First operand has 113 places, 76 transitions, 505 flow. Second operand 26 states and 491 transitions. [2025-03-09 01:26:23,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 328 transitions, 2820 flow [2025-03-09 01:26:23,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 328 transitions, 2724 flow, removed 0 selfloop flow, removed 11 redundant places. [2025-03-09 01:26:23,753 INFO L231 Difference]: Finished difference. Result has 128 places, 97 transitions, 742 flow [2025-03-09 01:26:23,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=742, PETRI_PLACES=128, PETRI_TRANSITIONS=97} [2025-03-09 01:26:23,753 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2025-03-09 01:26:23,753 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 97 transitions, 742 flow [2025-03-09 01:26:23,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.208333333333334) internal successors, (317), 24 states have internal predecessors, (317), 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 01:26:23,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:23,753 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:23,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 01:26:23,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:23,954 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:23,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash -577535698, now seen corresponding path program 2 times [2025-03-09 01:26:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547870840] [2025-03-09 01:26:23,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:23,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:23,959 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:26:23,973 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:26:23,974 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:23,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:24,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:24,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547870840] [2025-03-09 01:26:24,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547870840] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:24,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630114751] [2025-03-09 01:26:24,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:24,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:24,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:24,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:24,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:26:24,092 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-09 01:26:24,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-09 01:26:24,114 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:24,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:24,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:26:24,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:24,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630114751] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:24,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2025-03-09 01:26:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428244937] [2025-03-09 01:26:24,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:24,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-09 01:26:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:24,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-09 01:26:24,231 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-03-09 01:26:24,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:24,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 97 transitions, 742 flow. Second operand has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 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 01:26:24,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:24,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:24,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:25,687 INFO L124 PetriNetUnfolderBase]: 12084/17255 cut-off events. [2025-03-09 01:26:25,688 INFO L125 PetriNetUnfolderBase]: For 57407/58683 co-relation queries the response was YES. [2025-03-09 01:26:25,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71854 conditions, 17255 events. 12084/17255 cut-off events. For 57407/58683 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 96218 event pairs, 4836 based on Foata normal form. 0/16645 useless extension candidates. Maximal degree in co-relation 59233. Up to 6245 conditions per place. [2025-03-09 01:26:25,778 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 186 selfloop transitions, 35 changer transitions 0/227 dead transitions. [2025-03-09 01:26:25,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 227 transitions, 2047 flow [2025-03-09 01:26:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-09 01:26:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-09 01:26:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 316 transitions. [2025-03-09 01:26:25,779 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2025-03-09 01:26:25,779 INFO L175 Difference]: Start difference. First operand has 128 places, 97 transitions, 742 flow. Second operand 16 states and 316 transitions. [2025-03-09 01:26:25,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 227 transitions, 2047 flow [2025-03-09 01:26:25,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 227 transitions, 1985 flow, removed 22 selfloop flow, removed 6 redundant places. [2025-03-09 01:26:25,842 INFO L231 Difference]: Finished difference. Result has 141 places, 105 transitions, 880 flow [2025-03-09 01:26:25,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=880, PETRI_PLACES=141, PETRI_TRANSITIONS=105} [2025-03-09 01:26:25,842 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2025-03-09 01:26:25,842 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 105 transitions, 880 flow [2025-03-09 01:26:25,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.263157894736842) internal successors, (252), 19 states have internal predecessors, (252), 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 01:26:25,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:25,843 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:25,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:26,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2025-03-09 01:26:26,044 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:26,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 316285915, now seen corresponding path program 2 times [2025-03-09 01:26:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082925770] [2025-03-09 01:26:26,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:26,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:26,049 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-09 01:26:26,056 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:26:26,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:26,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082925770] [2025-03-09 01:26:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082925770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066199111] [2025-03-09 01:26:26,273 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:26,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:26,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:26,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:26:26,325 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-03-09 01:26:26,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:26:26,346 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:26,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:26,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-09 01:26:26,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:26,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-09 01:26:26,434 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-09 01:26:26,435 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 25 treesize of output 25 [2025-03-09 01:26:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:26,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066199111] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:27,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2025-03-09 01:26:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944309842] [2025-03-09 01:26:27,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:27,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 01:26:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:27,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 01:26:27,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2025-03-09 01:26:27,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 55 [2025-03-09 01:26:27,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 105 transitions, 880 flow. Second operand has 26 states, 26 states have (on average 9.307692307692308) internal successors, (242), 26 states have internal predecessors, (242), 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 01:26:27,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:27,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 55 [2025-03-09 01:26:27,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:30,610 INFO L124 PetriNetUnfolderBase]: 11987/16666 cut-off events. [2025-03-09 01:26:30,610 INFO L125 PetriNetUnfolderBase]: For 72034/73660 co-relation queries the response was YES. [2025-03-09 01:26:30,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74287 conditions, 16666 events. 11987/16666 cut-off events. For 72034/73660 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 90156 event pairs, 2519 based on Foata normal form. 580/16661 useless extension candidates. Maximal degree in co-relation 68635. Up to 3439 conditions per place. [2025-03-09 01:26:30,730 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 319 selfloop transitions, 57 changer transitions 0/381 dead transitions. [2025-03-09 01:26:30,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 381 transitions, 3722 flow [2025-03-09 01:26:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-09 01:26:30,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-03-09 01:26:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 485 transitions. [2025-03-09 01:26:30,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.26721763085399447 [2025-03-09 01:26:30,732 INFO L175 Difference]: Start difference. First operand has 141 places, 105 transitions, 880 flow. Second operand 33 states and 485 transitions. [2025-03-09 01:26:30,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 381 transitions, 3722 flow [2025-03-09 01:26:30,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 381 transitions, 3642 flow, removed 4 selfloop flow, removed 9 redundant places. [2025-03-09 01:26:30,831 INFO L231 Difference]: Finished difference. Result has 165 places, 121 transitions, 1121 flow [2025-03-09 01:26:30,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1121, PETRI_PLACES=165, PETRI_TRANSITIONS=121} [2025-03-09 01:26:30,832 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2025-03-09 01:26:30,832 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 121 transitions, 1121 flow [2025-03-09 01:26:30,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.307692307692308) internal successors, (242), 26 states have internal predecessors, (242), 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 01:26:30,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:30,832 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:30,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:31,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:31,033 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:31,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash -988317907, now seen corresponding path program 1 times [2025-03-09 01:26:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158241582] [2025-03-09 01:26:31,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:31,038 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-09 01:26:31,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 01:26:31,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:31,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:26:31,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:31,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158241582] [2025-03-09 01:26:31,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158241582] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712024963] [2025-03-09 01:26:31,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:31,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:31,132 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:31,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:26:31,184 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-09 01:26:31,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 01:26:31,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:31,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:31,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:26:31,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-09 01:26:31,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-09 01:26:31,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712024963] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:31,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:31,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2025-03-09 01:26:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391317948] [2025-03-09 01:26:31,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:31,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 01:26:31,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:31,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 01:26:31,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2025-03-09 01:26:31,448 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:31,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 121 transitions, 1121 flow. Second operand has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 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 01:26:31,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:31,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:31,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:32,509 INFO L124 PetriNetUnfolderBase]: 8442/12079 cut-off events. [2025-03-09 01:26:32,510 INFO L125 PetriNetUnfolderBase]: For 63197/63646 co-relation queries the response was YES. [2025-03-09 01:26:32,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56705 conditions, 12079 events. 8442/12079 cut-off events. For 63197/63646 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 64132 event pairs, 4274 based on Foata normal form. 208/12094 useless extension candidates. Maximal degree in co-relation 56614. Up to 6297 conditions per place. [2025-03-09 01:26:32,599 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 149 selfloop transitions, 40 changer transitions 0/200 dead transitions. [2025-03-09 01:26:32,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 200 transitions, 2151 flow [2025-03-09 01:26:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-09 01:26:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-09 01:26:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2025-03-09 01:26:32,600 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2025-03-09 01:26:32,600 INFO L175 Difference]: Start difference. First operand has 165 places, 121 transitions, 1121 flow. Second operand 12 states and 236 transitions. [2025-03-09 01:26:32,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 200 transitions, 2151 flow [2025-03-09 01:26:32,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 200 transitions, 1996 flow, removed 16 selfloop flow, removed 21 redundant places. [2025-03-09 01:26:32,660 INFO L231 Difference]: Finished difference. Result has 158 places, 125 transitions, 1161 flow [2025-03-09 01:26:32,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1161, PETRI_PLACES=158, PETRI_TRANSITIONS=125} [2025-03-09 01:26:32,661 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2025-03-09 01:26:32,661 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 125 transitions, 1161 flow [2025-03-09 01:26:32,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.5) internal successors, (270), 20 states have internal predecessors, (270), 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 01:26:32,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:32,661 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 01:26:32,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-09 01:26:32,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:32,863 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:32,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:32,863 INFO L85 PathProgramCache]: Analyzing trace with hash -786983800, now seen corresponding path program 1 times [2025-03-09 01:26:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494613633] [2025-03-09 01:26:32,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:32,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:26:32,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:26:32,870 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:32,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:26:32,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:32,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494613633] [2025-03-09 01:26:32,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494613633] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:32,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:32,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:26:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356807585] [2025-03-09 01:26:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:32,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:26:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:32,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:26:32,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:26:32,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:32,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 125 transitions, 1161 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 01:26:32,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:32,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:32,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:33,763 INFO L124 PetriNetUnfolderBase]: 7115/10657 cut-off events. [2025-03-09 01:26:33,763 INFO L125 PetriNetUnfolderBase]: For 55875/56664 co-relation queries the response was YES. [2025-03-09 01:26:33,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50627 conditions, 10657 events. 7115/10657 cut-off events. For 55875/56664 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 58553 event pairs, 1761 based on Foata normal form. 3/10500 useless extension candidates. Maximal degree in co-relation 50529. Up to 9059 conditions per place. [2025-03-09 01:26:33,831 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 138 selfloop transitions, 6 changer transitions 1/157 dead transitions. [2025-03-09 01:26:33,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 157 transitions, 1690 flow [2025-03-09 01:26:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:26:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:26:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2025-03-09 01:26:33,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5212121212121212 [2025-03-09 01:26:33,832 INFO L175 Difference]: Start difference. First operand has 158 places, 125 transitions, 1161 flow. Second operand 3 states and 86 transitions. [2025-03-09 01:26:33,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 157 transitions, 1690 flow [2025-03-09 01:26:33,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 157 transitions, 1602 flow, removed 1 selfloop flow, removed 9 redundant places. [2025-03-09 01:26:33,875 INFO L231 Difference]: Finished difference. Result has 152 places, 130 transitions, 1140 flow [2025-03-09 01:26:33,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1140, PETRI_PLACES=152, PETRI_TRANSITIONS=130} [2025-03-09 01:26:33,876 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2025-03-09 01:26:33,876 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 130 transitions, 1140 flow [2025-03-09 01:26:33,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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 01:26:33,876 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:33,876 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:33,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-09 01:26:33,876 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:33,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1942685775, now seen corresponding path program 3 times [2025-03-09 01:26:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:33,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886140581] [2025-03-09 01:26:33,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:26:33,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:33,883 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes. [2025-03-09 01:26:33,888 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 25 statements. [2025-03-09 01:26:33,888 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:26:33,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-03-09 01:26:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886140581] [2025-03-09 01:26:33,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886140581] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391707792] [2025-03-09 01:26:33,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:26:33,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:33,992 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:33,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 01:26:34,047 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 25 statements into 5 equivalence classes. [2025-03-09 01:26:34,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 25 statements. [2025-03-09 01:26:34,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:26:34,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:34,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 01:26:34,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:34,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:26:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-09 01:26:34,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2025-03-09 01:26:34,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391707792] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:34,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2025-03-09 01:26:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168722179] [2025-03-09 01:26:34,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:34,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:26:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:34,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:26:34,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:26:34,660 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:34,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 130 transitions, 1140 flow. Second operand has 18 states, 18 states have (on average 13.61111111111111) internal successors, (245), 18 states have internal predecessors, (245), 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 01:26:34,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:34,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:34,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:35,904 INFO L124 PetriNetUnfolderBase]: 8661/12502 cut-off events. [2025-03-09 01:26:35,904 INFO L125 PetriNetUnfolderBase]: For 60830/61654 co-relation queries the response was YES. [2025-03-09 01:26:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59784 conditions, 12502 events. 8661/12502 cut-off events. For 60830/61654 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 68657 event pairs, 1285 based on Foata normal form. 128/12332 useless extension candidates. Maximal degree in co-relation 59696. Up to 3382 conditions per place. [2025-03-09 01:26:36,092 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 257 selfloop transitions, 30 changer transitions 0/296 dead transitions. [2025-03-09 01:26:36,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 296 transitions, 2977 flow [2025-03-09 01:26:36,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:26:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:26:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2025-03-09 01:26:36,093 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2025-03-09 01:26:36,093 INFO L175 Difference]: Start difference. First operand has 152 places, 130 transitions, 1140 flow. Second operand 8 states and 185 transitions. [2025-03-09 01:26:36,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 296 transitions, 2977 flow [2025-03-09 01:26:36,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 296 transitions, 2959 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:26:36,158 INFO L231 Difference]: Finished difference. Result has 156 places, 130 transitions, 1190 flow [2025-03-09 01:26:36,158 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1190, PETRI_PLACES=156, PETRI_TRANSITIONS=130} [2025-03-09 01:26:36,159 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2025-03-09 01:26:36,159 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 130 transitions, 1190 flow [2025-03-09 01:26:36,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.61111111111111) internal successors, (245), 18 states have internal predecessors, (245), 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 01:26:36,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:36,159 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 01:26:36,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-09 01:26:36,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:36,360 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:36,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1673100669, now seen corresponding path program 1 times [2025-03-09 01:26:36,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:36,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042962920] [2025-03-09 01:26:36,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:36,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-09 01:26:36,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:26:36,368 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:36,368 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:36,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:36,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042962920] [2025-03-09 01:26:36,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042962920] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733143427] [2025-03-09 01:26:36,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:36,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:36,427 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:36,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-09 01:26:36,483 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-09 01:26:36,501 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:26:36,501 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:36,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:36,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:26:36,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:36,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:26:36,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733143427] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:36,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:26:36,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2025-03-09 01:26:36,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659650272] [2025-03-09 01:26:36,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:36,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:26:36,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:36,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:26:36,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-09 01:26:36,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:36,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 130 transitions, 1190 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:36,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:36,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:36,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:37,513 INFO L124 PetriNetUnfolderBase]: 8126/11913 cut-off events. [2025-03-09 01:26:37,513 INFO L125 PetriNetUnfolderBase]: For 67677/68423 co-relation queries the response was YES. [2025-03-09 01:26:37,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57900 conditions, 11913 events. 8126/11913 cut-off events. For 67677/68423 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 65565 event pairs, 2440 based on Foata normal form. 346/11950 useless extension candidates. Maximal degree in co-relation 57813. Up to 6430 conditions per place. [2025-03-09 01:26:37,602 INFO L140 encePairwiseOnDemand]: 49/55 looper letters, 150 selfloop transitions, 13 changer transitions 0/172 dead transitions. [2025-03-09 01:26:37,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 172 transitions, 1819 flow [2025-03-09 01:26:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:26:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:26:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2025-03-09 01:26:37,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2025-03-09 01:26:37,603 INFO L175 Difference]: Start difference. First operand has 156 places, 130 transitions, 1190 flow. Second operand 5 states and 105 transitions. [2025-03-09 01:26:37,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 172 transitions, 1819 flow [2025-03-09 01:26:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 1762 flow, removed 4 selfloop flow, removed 5 redundant places. [2025-03-09 01:26:37,706 INFO L231 Difference]: Finished difference. Result has 155 places, 127 transitions, 1120 flow [2025-03-09 01:26:37,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=155, PETRI_TRANSITIONS=127} [2025-03-09 01:26:37,709 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2025-03-09 01:26:37,709 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 127 transitions, 1120 flow [2025-03-09 01:26:37,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:37,709 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:37,709 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 01:26:37,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-09 01:26:37,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-09 01:26:37,910 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:37,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2076140551, now seen corresponding path program 1 times [2025-03-09 01:26:37,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813532504] [2025-03-09 01:26:37,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:37,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-09 01:26:37,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:26:37,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:37,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 01:26:37,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:37,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813532504] [2025-03-09 01:26:37,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813532504] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:26:37,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:26:37,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:26:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195421849] [2025-03-09 01:26:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:26:37,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:26:37,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:37,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:26:37,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:26:37,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:37,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 127 transitions, 1120 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:37,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:37,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:37,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:38,790 INFO L124 PetriNetUnfolderBase]: 7576/10949 cut-off events. [2025-03-09 01:26:38,790 INFO L125 PetriNetUnfolderBase]: For 65861/67072 co-relation queries the response was YES. [2025-03-09 01:26:38,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52713 conditions, 10949 events. 7576/10949 cut-off events. For 65861/67072 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 58926 event pairs, 2311 based on Foata normal form. 272/10761 useless extension candidates. Maximal degree in co-relation 52626. Up to 5914 conditions per place. [2025-03-09 01:26:38,859 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 136 selfloop transitions, 22 changer transitions 0/164 dead transitions. [2025-03-09 01:26:38,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 164 transitions, 1773 flow [2025-03-09 01:26:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:26:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:26:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2025-03-09 01:26:38,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2025-03-09 01:26:38,860 INFO L175 Difference]: Start difference. First operand has 155 places, 127 transitions, 1120 flow. Second operand 4 states and 91 transitions. [2025-03-09 01:26:38,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 164 transitions, 1773 flow [2025-03-09 01:26:38,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 164 transitions, 1726 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-09 01:26:38,912 INFO L231 Difference]: Finished difference. Result has 152 places, 124 transitions, 1110 flow [2025-03-09 01:26:38,912 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=152, PETRI_TRANSITIONS=124} [2025-03-09 01:26:38,913 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2025-03-09 01:26:38,913 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 124 transitions, 1110 flow [2025-03-09 01:26:38,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:26:38,913 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:38,913 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:38,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-09 01:26:38,913 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:38,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1362450672, now seen corresponding path program 2 times [2025-03-09 01:26:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:38,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188377812] [2025-03-09 01:26:38,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:38,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:38,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-09 01:26:38,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:26:38,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:38,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-09 01:26:39,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188377812] [2025-03-09 01:26:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188377812] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831654387] [2025-03-09 01:26:39,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:39,048 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:39,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-09 01:26:39,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-03-09 01:26:39,127 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-03-09 01:26:39,127 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:39,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:39,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:26:39,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-09 01:26:39,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-09 01:26:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831654387] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:39,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:39,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2025-03-09 01:26:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493655921] [2025-03-09 01:26:39,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:39,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-09 01:26:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:39,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-09 01:26:39,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2025-03-09 01:26:39,421 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:26:39,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 124 transitions, 1110 flow. Second operand has 23 states, 23 states have (on average 13.217391304347826) internal successors, (304), 23 states have internal predecessors, (304), 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 01:26:39,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:39,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:26:39,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:40,807 INFO L124 PetriNetUnfolderBase]: 10126/14848 cut-off events. [2025-03-09 01:26:40,807 INFO L125 PetriNetUnfolderBase]: For 78059/78717 co-relation queries the response was YES. [2025-03-09 01:26:40,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70851 conditions, 14848 events. 10126/14848 cut-off events. For 78059/78717 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 84173 event pairs, 4159 based on Foata normal form. 118/14822 useless extension candidates. Maximal degree in co-relation 58226. Up to 5315 conditions per place. [2025-03-09 01:26:40,902 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 205 selfloop transitions, 59 changer transitions 0/276 dead transitions. [2025-03-09 01:26:40,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 276 transitions, 2975 flow [2025-03-09 01:26:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:26:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-09 01:26:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2025-03-09 01:26:40,903 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35515151515151516 [2025-03-09 01:26:40,903 INFO L175 Difference]: Start difference. First operand has 152 places, 124 transitions, 1110 flow. Second operand 15 states and 293 transitions. [2025-03-09 01:26:40,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 276 transitions, 2975 flow [2025-03-09 01:26:40,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 276 transitions, 2869 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:26:40,993 INFO L231 Difference]: Finished difference. Result has 169 places, 145 transitions, 1520 flow [2025-03-09 01:26:40,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1520, PETRI_PLACES=169, PETRI_TRANSITIONS=145} [2025-03-09 01:26:40,993 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2025-03-09 01:26:40,993 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 145 transitions, 1520 flow [2025-03-09 01:26:40,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.217391304347826) internal successors, (304), 23 states have internal predecessors, (304), 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 01:26:40,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:40,994 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:41,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-09 01:26:41,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-09 01:26:41,194 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:41,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:41,195 INFO L85 PathProgramCache]: Analyzing trace with hash -265612494, now seen corresponding path program 1 times [2025-03-09 01:26:41,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:41,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076940588] [2025-03-09 01:26:41,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:41,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:41,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-09 01:26:41,215 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:41,215 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:41,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076940588] [2025-03-09 01:26:41,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076940588] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:41,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329433115] [2025-03-09 01:26:41,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:26:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:41,579 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:41,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-09 01:26:41,631 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-09 01:26:41,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:41,650 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:26:41,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:41,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-09 01:26:41,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:41,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-09 01:26:41,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:41,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-09 01:26:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:41,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:42,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:42,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2025-03-09 01:26:42,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:42,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 234 [2025-03-09 01:26:42,822 INFO L349 Elim1Store]: treesize reduction 5, result has 82.8 percent of original size [2025-03-09 01:26:42,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 139 [2025-03-09 01:26:42,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:42,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 174 [2025-03-09 01:26:42,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:42,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 134 [2025-03-09 01:26:43,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 178 [2025-03-09 01:26:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 110 [2025-03-09 01:26:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2025-03-09 01:26:43,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 50 [2025-03-09 01:26:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 211 [2025-03-09 01:26:43,099 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2025-03-09 01:26:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 50 [2025-03-09 01:26:43,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 369 treesize of output 295 [2025-03-09 01:26:43,142 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 143 [2025-03-09 01:26:43,159 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:43,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,168 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-09 01:26:43,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 1 [2025-03-09 01:26:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 227 [2025-03-09 01:26:43,189 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:43,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 211 [2025-03-09 01:26:43,201 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:43,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329433115] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:43,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2025-03-09 01:26:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411994763] [2025-03-09 01:26:43,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:43,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 01:26:43,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:43,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 01:26:43,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2025-03-09 01:26:43,598 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:43,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 145 transitions, 1520 flow. Second operand has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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 01:26:43,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:43,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:43,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:45,386 INFO L124 PetriNetUnfolderBase]: 8270/12602 cut-off events. [2025-03-09 01:26:45,386 INFO L125 PetriNetUnfolderBase]: For 86487/87504 co-relation queries the response was YES. [2025-03-09 01:26:45,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62895 conditions, 12602 events. 8270/12602 cut-off events. For 86487/87504 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 74015 event pairs, 3645 based on Foata normal form. 1/12453 useless extension candidates. Maximal degree in co-relation 52256. Up to 10806 conditions per place. [2025-03-09 01:26:45,487 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 125 selfloop transitions, 53 changer transitions 37/228 dead transitions. [2025-03-09 01:26:45,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 228 transitions, 2545 flow [2025-03-09 01:26:45,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-09 01:26:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-09 01:26:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 329 transitions. [2025-03-09 01:26:45,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3518716577540107 [2025-03-09 01:26:45,488 INFO L175 Difference]: Start difference. First operand has 169 places, 145 transitions, 1520 flow. Second operand 17 states and 329 transitions. [2025-03-09 01:26:45,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 228 transitions, 2545 flow [2025-03-09 01:26:45,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2527 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-09 01:26:45,591 INFO L231 Difference]: Finished difference. Result has 191 places, 149 transitions, 1675 flow [2025-03-09 01:26:45,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1675, PETRI_PLACES=191, PETRI_TRANSITIONS=149} [2025-03-09 01:26:45,591 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 135 predicate places. [2025-03-09 01:26:45,591 INFO L471 AbstractCegarLoop]: Abstraction has has 191 places, 149 transitions, 1675 flow [2025-03-09 01:26:45,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.423076923076923) internal successors, (375), 26 states have internal predecessors, (375), 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 01:26:45,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:45,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:45,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-09 01:26:45,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:45,792 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:45,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1264474660, now seen corresponding path program 2 times [2025-03-09 01:26:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:45,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130866520] [2025-03-09 01:26:45,793 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:45,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:45,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-09 01:26:45,819 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:45,819 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:45,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:26:46,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130866520] [2025-03-09 01:26:46,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130866520] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:46,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869435956] [2025-03-09 01:26:46,347 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:26:46,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:46,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:46,349 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:46,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-09 01:26:46,405 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-09 01:26:46,426 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:46,426 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:26:46,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:46,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-03-09 01:26:46,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:46,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-09 01:26:46,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:46,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-09 01:26:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:46,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:46,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:46,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2025-03-09 01:26:47,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:47,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 235 [2025-03-09 01:26:47,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:47,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 182 [2025-03-09 01:26:47,743 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:26:47,746 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-09 01:26:47,748 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-09 01:26:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-09 01:26:47,759 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2025-03-09 01:26:47,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 172 treesize of output 1 [2025-03-09 01:26:47,792 INFO L349 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2025-03-09 01:26:47,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 71 [2025-03-09 01:26:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869435956] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:47,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:47,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2025-03-09 01:26:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010138572] [2025-03-09 01:26:47,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:47,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-09 01:26:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:47,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-09 01:26:47,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2025-03-09 01:26:48,673 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:48,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 149 transitions, 1675 flow. Second operand has 31 states, 31 states have (on average 12.35483870967742) internal successors, (383), 31 states have internal predecessors, (383), 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 01:26:48,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:48,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:48,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:50,955 INFO L124 PetriNetUnfolderBase]: 8473/13214 cut-off events. [2025-03-09 01:26:50,956 INFO L125 PetriNetUnfolderBase]: For 89642/90728 co-relation queries the response was YES. [2025-03-09 01:26:51,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65430 conditions, 13214 events. 8473/13214 cut-off events. For 89642/90728 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 81998 event pairs, 4971 based on Foata normal form. 13/13091 useless extension candidates. Maximal degree in co-relation 65370. Up to 11058 conditions per place. [2025-03-09 01:26:51,056 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 136 selfloop transitions, 111 changer transitions 30/290 dead transitions. [2025-03-09 01:26:51,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 290 transitions, 3397 flow [2025-03-09 01:26:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-09 01:26:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-09 01:26:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 417 transitions. [2025-03-09 01:26:51,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2916083916083916 [2025-03-09 01:26:51,060 INFO L175 Difference]: Start difference. First operand has 191 places, 149 transitions, 1675 flow. Second operand 26 states and 417 transitions. [2025-03-09 01:26:51,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 290 transitions, 3397 flow [2025-03-09 01:26:51,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 290 transitions, 3194 flow, removed 32 selfloop flow, removed 12 redundant places. [2025-03-09 01:26:51,199 INFO L231 Difference]: Finished difference. Result has 212 places, 198 transitions, 2392 flow [2025-03-09 01:26:51,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2392, PETRI_PLACES=212, PETRI_TRANSITIONS=198} [2025-03-09 01:26:51,200 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 156 predicate places. [2025-03-09 01:26:51,200 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 198 transitions, 2392 flow [2025-03-09 01:26:51,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.35483870967742) internal successors, (383), 31 states have internal predecessors, (383), 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 01:26:51,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:51,200 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:51,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-09 01:26:51,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:51,401 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:51,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:51,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1641682202, now seen corresponding path program 3 times [2025-03-09 01:26:51,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:51,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884880094] [2025-03-09 01:26:51,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:26:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:51,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-03-09 01:26:51,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 30 statements. [2025-03-09 01:26:51,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:26:51,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-09 01:26:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884880094] [2025-03-09 01:26:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884880094] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092941487] [2025-03-09 01:26:51,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:26:51,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:51,823 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:51,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-09 01:26:51,877 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 30 statements into 3 equivalence classes. [2025-03-09 01:26:51,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 30 statements. [2025-03-09 01:26:51,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:26:51,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:51,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-09 01:26:51,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:51,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-09 01:26:52,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:52,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-09 01:26:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:52,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:52,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:52,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 232 [2025-03-09 01:26:52,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:52,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 104 [2025-03-09 01:26:52,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:26:52,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 68 [2025-03-09 01:26:52,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:52,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092941487] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:52,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2025-03-09 01:26:52,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391975617] [2025-03-09 01:26:52,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:52,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-09 01:26:52,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:52,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-09 01:26:52,675 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2025-03-09 01:26:53,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2025-03-09 01:26:53,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 198 transitions, 2392 flow. Second operand has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 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 01:26:53,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:53,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2025-03-09 01:26:53,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:26:55,383 INFO L124 PetriNetUnfolderBase]: 8682/13497 cut-off events. [2025-03-09 01:26:55,384 INFO L125 PetriNetUnfolderBase]: For 109205/110197 co-relation queries the response was YES. [2025-03-09 01:26:55,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70978 conditions, 13497 events. 8682/13497 cut-off events. For 109205/110197 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 83952 event pairs, 3957 based on Foata normal form. 19/13370 useless extension candidates. Maximal degree in co-relation 70866. Up to 11302 conditions per place. [2025-03-09 01:26:55,484 INFO L140 encePairwiseOnDemand]: 38/55 looper letters, 172 selfloop transitions, 118 changer transitions 27/330 dead transitions. [2025-03-09 01:26:55,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 330 transitions, 4186 flow [2025-03-09 01:26:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-09 01:26:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-09 01:26:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 444 transitions. [2025-03-09 01:26:55,485 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33636363636363636 [2025-03-09 01:26:55,485 INFO L175 Difference]: Start difference. First operand has 212 places, 198 transitions, 2392 flow. Second operand 24 states and 444 transitions. [2025-03-09 01:26:55,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 330 transitions, 4186 flow [2025-03-09 01:26:55,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 330 transitions, 3939 flow, removed 38 selfloop flow, removed 12 redundant places. [2025-03-09 01:26:55,650 INFO L231 Difference]: Finished difference. Result has 232 places, 233 transitions, 2977 flow [2025-03-09 01:26:55,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2977, PETRI_PLACES=232, PETRI_TRANSITIONS=233} [2025-03-09 01:26:55,651 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 176 predicate places. [2025-03-09 01:26:55,651 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 233 transitions, 2977 flow [2025-03-09 01:26:55,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 14.464285714285714) internal successors, (405), 28 states have internal predecessors, (405), 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 01:26:55,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:26:55,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:26:55,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-09 01:26:55,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:55,852 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:26:55,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:26:55,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1276250162, now seen corresponding path program 4 times [2025-03-09 01:26:55,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:26:55,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544486837] [2025-03-09 01:26:55,853 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:26:55,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:26:55,860 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-09 01:26:55,879 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:55,879 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:26:55,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:26:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544486837] [2025-03-09 01:26:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544486837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:26:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137310606] [2025-03-09 01:26:56,661 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:26:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:26:56,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:26:56,664 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:26:56,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-09 01:26:56,720 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-03-09 01:26:56,739 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:26:56,739 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:26:56,739 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:26:56,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-03-09 01:26:56,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:26:56,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-09 01:26:56,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-09 01:26:56,786 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 01:26:56,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 01:26:56,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-09 01:26:57,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2025-03-09 01:26:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:57,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:26:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:26:57,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137310606] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:26:57,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:26:57,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2025-03-09 01:26:57,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978413209] [2025-03-09 01:26:57,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:26:57,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-09 01:26:57,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:26:57,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-09 01:26:57,270 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2025-03-09 01:26:57,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2025-03-09 01:26:57,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 233 transitions, 2977 flow. Second operand has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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 01:26:57,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:26:57,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2025-03-09 01:26:57,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:00,134 INFO L124 PetriNetUnfolderBase]: 8701/13507 cut-off events. [2025-03-09 01:27:00,135 INFO L125 PetriNetUnfolderBase]: For 120806/121826 co-relation queries the response was YES. [2025-03-09 01:27:00,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74059 conditions, 13507 events. 8701/13507 cut-off events. For 120806/121826 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 83444 event pairs, 4541 based on Foata normal form. 9/13366 useless extension candidates. Maximal degree in co-relation 73941. Up to 11538 conditions per place. [2025-03-09 01:27:00,255 INFO L140 encePairwiseOnDemand]: 41/55 looper letters, 136 selfloop transitions, 80 changer transitions 52/281 dead transitions. [2025-03-09 01:27:00,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 281 transitions, 3869 flow [2025-03-09 01:27:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:27:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-09 01:27:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 251 transitions. [2025-03-09 01:27:00,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30424242424242426 [2025-03-09 01:27:00,256 INFO L175 Difference]: Start difference. First operand has 232 places, 233 transitions, 2977 flow. Second operand 15 states and 251 transitions. [2025-03-09 01:27:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 281 transitions, 3869 flow [2025-03-09 01:27:00,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 281 transitions, 3751 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-03-09 01:27:00,475 INFO L231 Difference]: Finished difference. Result has 236 places, 214 transitions, 2791 flow [2025-03-09 01:27:00,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2791, PETRI_PLACES=236, PETRI_TRANSITIONS=214} [2025-03-09 01:27:00,475 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 180 predicate places. [2025-03-09 01:27:00,475 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 214 transitions, 2791 flow [2025-03-09 01:27:00,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.392857142857142) internal successors, (347), 28 states have internal predecessors, (347), 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 01:27:00,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:00,476 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:00,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:00,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2025-03-09 01:27:00,677 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:27:00,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 65414296, now seen corresponding path program 5 times [2025-03-09 01:27:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:00,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768831081] [2025-03-09 01:27:00,677 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:00,686 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-03-09 01:27:00,703 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:27:00,703 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-09 01:27:00,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:27:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768831081] [2025-03-09 01:27:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768831081] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260195219] [2025-03-09 01:27:01,433 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:27:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:01,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:01,435 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:27:01,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-09 01:27:01,499 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 30 statements into 3 equivalence classes. [2025-03-09 01:27:01,522 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 30 of 30 statements. [2025-03-09 01:27:01,522 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-09 01:27:01,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:01,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-09 01:27:01,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:01,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:27:01,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2025-03-09 01:27:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:27:01,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:01,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-09 01:27:01,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2025-03-09 01:27:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:27:02,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260195219] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:02,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2025-03-09 01:27:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974641851] [2025-03-09 01:27:02,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:02,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-09 01:27:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:02,261 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-09 01:27:02,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2025-03-09 01:27:02,823 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2025-03-09 01:27:02,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 214 transitions, 2791 flow. Second operand has 31 states, 31 states have (on average 11.32258064516129) internal successors, (351), 31 states have internal predecessors, (351), 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 01:27:02,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:02,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2025-03-09 01:27:02,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:05,247 INFO L124 PetriNetUnfolderBase]: 11037/16639 cut-off events. [2025-03-09 01:27:05,247 INFO L125 PetriNetUnfolderBase]: For 141731/143009 co-relation queries the response was YES. [2025-03-09 01:27:05,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90460 conditions, 16639 events. 11037/16639 cut-off events. For 141731/143009 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 99990 event pairs, 4044 based on Foata normal form. 9/15989 useless extension candidates. Maximal degree in co-relation 90360. Up to 14641 conditions per place. [2025-03-09 01:27:05,370 INFO L140 encePairwiseOnDemand]: 40/55 looper letters, 149 selfloop transitions, 67 changer transitions 64/285 dead transitions. [2025-03-09 01:27:05,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 285 transitions, 3928 flow [2025-03-09 01:27:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-09 01:27:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-09 01:27:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 283 transitions. [2025-03-09 01:27:05,371 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28585858585858587 [2025-03-09 01:27:05,371 INFO L175 Difference]: Start difference. First operand has 236 places, 214 transitions, 2791 flow. Second operand 18 states and 283 transitions. [2025-03-09 01:27:05,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 285 transitions, 3928 flow [2025-03-09 01:27:05,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 285 transitions, 3700 flow, removed 11 selfloop flow, removed 19 redundant places. [2025-03-09 01:27:05,662 INFO L231 Difference]: Finished difference. Result has 224 places, 192 transitions, 2501 flow [2025-03-09 01:27:05,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2567, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2501, PETRI_PLACES=224, PETRI_TRANSITIONS=192} [2025-03-09 01:27:05,662 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2025-03-09 01:27:05,663 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 192 transitions, 2501 flow [2025-03-09 01:27:05,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 11.32258064516129) internal successors, (351), 31 states have internal predecessors, (351), 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 01:27:05,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:05,663 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:05,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-09 01:27:05,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-03-09 01:27:05,863 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:27:05,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash -301010829, now seen corresponding path program 3 times [2025-03-09 01:27:05,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:05,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389728991] [2025-03-09 01:27:05,864 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:05,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:05,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 6 equivalence classes. [2025-03-09 01:27:05,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 31 statements. [2025-03-09 01:27:05,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:05,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-09 01:27:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389728991] [2025-03-09 01:27:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389728991] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138861027] [2025-03-09 01:27:05,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:27:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:05,979 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:27:05,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-09 01:27:06,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 31 statements into 6 equivalence classes. [2025-03-09 01:27:06,057 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 31 statements. [2025-03-09 01:27:06,057 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:27:06,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:06,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-09 01:27:06,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:06,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-09 01:27:06,420 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-09 01:27:06,420 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 18 treesize of output 17 [2025-03-09 01:27:06,430 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-09 01:27:06,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-09 01:27:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-09 01:27:06,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:06,894 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 72 treesize of output 68 [2025-03-09 01:27:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2025-03-09 01:27:07,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138861027] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:07,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:07,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2025-03-09 01:27:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161449435] [2025-03-09 01:27:07,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:07,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-09 01:27:07,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:07,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-09 01:27:07,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2025-03-09 01:27:07,364 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 55 [2025-03-09 01:27:07,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 192 transitions, 2501 flow. Second operand has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 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 01:27:07,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:07,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 55 [2025-03-09 01:27:07,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:09,433 INFO L124 PetriNetUnfolderBase]: 10052/14788 cut-off events. [2025-03-09 01:27:09,434 INFO L125 PetriNetUnfolderBase]: For 117496/118238 co-relation queries the response was YES. [2025-03-09 01:27:09,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81361 conditions, 14788 events. 10052/14788 cut-off events. For 117496/118238 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 86952 event pairs, 1734 based on Foata normal form. 154/14797 useless extension candidates. Maximal degree in co-relation 81309. Up to 4780 conditions per place. [2025-03-09 01:27:09,559 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 240 selfloop transitions, 48 changer transitions 0/298 dead transitions. [2025-03-09 01:27:09,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 298 transitions, 4071 flow [2025-03-09 01:27:09,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:27:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-09 01:27:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2025-03-09 01:27:09,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3373737373737374 [2025-03-09 01:27:09,560 INFO L175 Difference]: Start difference. First operand has 224 places, 192 transitions, 2501 flow. Second operand 9 states and 167 transitions. [2025-03-09 01:27:09,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 298 transitions, 4071 flow [2025-03-09 01:27:09,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 298 transitions, 3612 flow, removed 33 selfloop flow, removed 23 redundant places. [2025-03-09 01:27:09,808 INFO L231 Difference]: Finished difference. Result has 181 places, 193 transitions, 2246 flow [2025-03-09 01:27:09,809 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2246, PETRI_PLACES=181, PETRI_TRANSITIONS=193} [2025-03-09 01:27:09,809 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2025-03-09 01:27:09,809 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 193 transitions, 2246 flow [2025-03-09 01:27:09,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.478260869565217) internal successors, (264), 23 states have internal predecessors, (264), 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 01:27:09,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:09,809 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:09,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2025-03-09 01:27:10,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-03-09 01:27:10,010 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:27:10,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:10,011 INFO L85 PathProgramCache]: Analyzing trace with hash -301010827, now seen corresponding path program 1 times [2025-03-09 01:27:10,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:10,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296204551] [2025-03-09 01:27:10,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:10,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-09 01:27:10,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-09 01:27:10,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:10,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-09 01:27:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296204551] [2025-03-09 01:27:10,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296204551] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:27:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868251397] [2025-03-09 01:27:10,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:27:10,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:10,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:27:10,198 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:27:10,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-09 01:27:10,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-09 01:27:10,277 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-09 01:27:10,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:27:10,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:10,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-09 01:27:10,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:27:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-09 01:27:10,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:27:10,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-09 01:27:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2025-03-09 01:27:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868251397] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:27:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:27:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2025-03-09 01:27:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463753910] [2025-03-09 01:27:10,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:27:10,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-09 01:27:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:10,576 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-09 01:27:10,576 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2025-03-09 01:27:10,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:27:10,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 193 transitions, 2246 flow. Second operand has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 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 01:27:10,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:10,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:27:10,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:14,144 INFO L124 PetriNetUnfolderBase]: 17403/25543 cut-off events. [2025-03-09 01:27:14,145 INFO L125 PetriNetUnfolderBase]: For 171749/172203 co-relation queries the response was YES. [2025-03-09 01:27:14,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132876 conditions, 25543 events. 17403/25543 cut-off events. For 171749/172203 co-relation queries the response was YES. Maximal size of possible extension queue 744. Compared 161148 event pairs, 2896 based on Foata normal form. 46/25565 useless extension candidates. Maximal degree in co-relation 132833. Up to 3678 conditions per place. [2025-03-09 01:27:14,323 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 545 selfloop transitions, 94 changer transitions 0/649 dead transitions. [2025-03-09 01:27:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 649 transitions, 7794 flow [2025-03-09 01:27:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-09 01:27:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-09 01:27:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 479 transitions. [2025-03-09 01:27:14,324 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147186147186147 [2025-03-09 01:27:14,324 INFO L175 Difference]: Start difference. First operand has 181 places, 193 transitions, 2246 flow. Second operand 21 states and 479 transitions. [2025-03-09 01:27:14,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 649 transitions, 7794 flow [2025-03-09 01:27:14,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 649 transitions, 7644 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-03-09 01:27:14,780 INFO L231 Difference]: Finished difference. Result has 198 places, 225 transitions, 2856 flow [2025-03-09 01:27:14,781 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2856, PETRI_PLACES=198, PETRI_TRANSITIONS=225} [2025-03-09 01:27:14,781 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2025-03-09 01:27:14,781 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 225 transitions, 2856 flow [2025-03-09 01:27:14,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 13.444444444444445) internal successors, (363), 27 states have internal predecessors, (363), 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 01:27:14,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:27:14,781 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:27:14,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-09 01:27:14,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:27:14,982 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-09 01:27:14,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:27:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1236711285, now seen corresponding path program 6 times [2025-03-09 01:27:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:27:14,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743518145] [2025-03-09 01:27:14,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:27:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:27:14,988 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 34 statements into 4 equivalence classes. [2025-03-09 01:27:14,995 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 34 statements. [2025-03-09 01:27:14,995 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-03-09 01:27:14,996 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:27:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-03-09 01:27:15,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:27:15,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743518145] [2025-03-09 01:27:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743518145] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:27:15,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:27:15,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-09 01:27:15,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620947525] [2025-03-09 01:27:15,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:27:15,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-09 01:27:15,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:27:15,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-09 01:27:15,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:27:15,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2025-03-09 01:27:15,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 225 transitions, 2856 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 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 01:27:15,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:27:15,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2025-03-09 01:27:15,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:27:18,671 INFO L124 PetriNetUnfolderBase]: 19380/29465 cut-off events. [2025-03-09 01:27:18,671 INFO L125 PetriNetUnfolderBase]: For 225496/226786 co-relation queries the response was YES. [2025-03-09 01:27:18,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151272 conditions, 29465 events. 19380/29465 cut-off events. For 225496/226786 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 196227 event pairs, 3280 based on Foata normal form. 157/29202 useless extension candidates. Maximal degree in co-relation 151226. Up to 23775 conditions per place. [2025-03-09 01:27:18,938 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 284 selfloop transitions, 71 changer transitions 1/368 dead transitions. [2025-03-09 01:27:18,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 368 transitions, 5078 flow [2025-03-09 01:27:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:27:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:27:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2025-03-09 01:27:18,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39454545454545453 [2025-03-09 01:27:18,939 INFO L175 Difference]: Start difference. First operand has 198 places, 225 transitions, 2856 flow. Second operand 10 states and 217 transitions. [2025-03-09 01:27:18,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 368 transitions, 5078 flow