./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:49:51,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:49:51,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:49:51,607 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:49:51,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:49:51,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:49:51,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:49:51,641 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:49:51,641 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:49:51,642 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:49:51,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:49:51,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:49:51,644 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:49:51,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:49:51,646 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:49:51,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:49:51,646 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:49:51,647 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:49:51,647 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:49:51,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:49:51,648 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:49:51,650 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:49:51,651 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:49:51,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:49:51,651 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:49:51,651 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:49:51,652 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:49:51,652 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:49:51,652 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:49:51,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:49:51,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:49:51,653 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:49:51,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:49:51,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:49:51,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:49:51,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:49:51,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:49:51,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:49:51,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:49:51,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:49:51,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:49:51,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:49:51,660 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-20 17:49:51,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:49:51,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:49:51,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:49:51,920 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:49:51,921 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:49:51,922 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-20 17:49:53,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:49:53,503 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:49:53,504 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-20 17:49:53,512 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f45bceb9/62dd386a703844b7854bb3e0179390f4/FLAG8f32ce853 [2024-11-20 17:49:53,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f45bceb9/62dd386a703844b7854bb3e0179390f4 [2024-11-20 17:49:53,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:49:53,896 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:49:53,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:49:53,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:49:53,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:49:53,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:53" (1/1) ... [2024-11-20 17:49:53,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210fca10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:53, skipping insertion in model container [2024-11-20 17:49:53,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:49:53" (1/1) ... [2024-11-20 17:49:53,932 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:49:54,176 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:49:54,178 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:49:54,191 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:49:54,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:49:54,245 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:49:54,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54 WrapperNode [2024-11-20 17:49:54,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:49:54,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:49:54,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:49:54,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:49:54,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,295 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 140 [2024-11-20 17:49:54,299 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:49:54,299 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:49:54,300 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:49:54,300 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:49:54,310 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,313 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,342 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-20 17:49:54,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:49:54,373 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:49:54,373 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:49:54,373 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:49:54,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (1/1) ... [2024-11-20 17:49:54,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:49:54,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:54,413 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) [2024-11-20 17:49:54,417 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 [2024-11-20 17:49:54,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:49:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:49:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:49:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:49:54,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:49:54,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:49:54,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:49:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:49:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:49:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:49:54,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:49:54,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:49:54,472 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:49:54,575 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:49:54,577 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:49:54,987 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:49:54,987 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:49:55,250 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:49:55,250 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:49:55,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:55 BoogieIcfgContainer [2024-11-20 17:49:55,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:49:55,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:49:55,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:49:55,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:49:55,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:49:53" (1/3) ... [2024-11-20 17:49:55,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360123cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:55, skipping insertion in model container [2024-11-20 17:49:55,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:49:54" (2/3) ... [2024-11-20 17:49:55,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@360123cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:49:55, skipping insertion in model container [2024-11-20 17:49:55,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:49:55" (3/3) ... [2024-11-20 17:49:55,261 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-20 17:49:55,278 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:49:55,278 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-20 17:49:55,279 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:49:55,343 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:49:55,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-11-20 17:49:55,414 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-11-20 17:49:55,414 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:49:55,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 7/61 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 152 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-20 17:49:55,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-11-20 17:49:55,423 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-11-20 17:49:55,432 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:49:55,439 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;@6c51e78c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:49:55,442 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-20 17:49:55,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:49:55,449 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:49:55,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:49:55,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:55,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:49:55,450 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:49:55,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 607425, now seen corresponding path program 1 times [2024-11-20 17:49:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:55,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47719387] [2024-11-20 17:49:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:55,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47719387] [2024-11-20 17:49:55,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47719387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:55,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:55,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:49:55,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982172346] [2024-11-20 17:49:55,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:55,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:49:55,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:55,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:49:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:49:55,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:49:55,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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) [2024-11-20 17:49:55,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:55,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:49:55,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:56,307 INFO L124 PetriNetUnfolderBase]: 1588/2580 cut-off events. [2024-11-20 17:49:56,308 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-11-20 17:49:56,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4895 conditions, 2580 events. 1588/2580 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15398 event pairs, 1210 based on Foata normal form. 1/1918 useless extension candidates. Maximal degree in co-relation 4374. Up to 2144 conditions per place. [2024-11-20 17:49:56,335 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-20 17:49:56,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-11-20 17:49:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:49:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:49:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-20 17:49:56,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-20 17:49:56,350 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-11-20 17:49:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-11-20 17:49:56,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:49:56,363 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-11-20 17:49:56,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-20 17:49:56,370 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-11-20 17:49:56,372 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-11-20 17:49:56,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 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) [2024-11-20 17:49:56,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:56,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:49:56,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:49:56,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:49:56,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 607426, now seen corresponding path program 1 times [2024-11-20 17:49:56,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:56,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873253266] [2024-11-20 17:49:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:56,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:56,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873253266] [2024-11-20 17:49:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873253266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:56,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:49:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616233195] [2024-11-20 17:49:56,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:56,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:49:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:56,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:49:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:49:56,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:49:56,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-20 17:49:56,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:56,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:49:56,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:57,015 INFO L124 PetriNetUnfolderBase]: 1589/2583 cut-off events. [2024-11-20 17:49:57,016 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-20 17:49:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2583 events. 1589/2583 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15377 event pairs, 1210 based on Foata normal form. 0/1917 useless extension candidates. Maximal degree in co-relation 4754. Up to 2157 conditions per place. [2024-11-20 17:49:57,030 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-20 17:49:57,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-11-20 17:49:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:49:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:49:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-20 17:49:57,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-11-20 17:49:57,035 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-11-20 17:49:57,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-11-20 17:49:57,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:49:57,037 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-11-20 17:49:57,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-11-20 17:49:57,039 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-11-20 17:49:57,039 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-11-20 17:49:57,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-20 17:49:57,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:57,040 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:49:57,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:49:57,040 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:49:57,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 18832013, now seen corresponding path program 1 times [2024-11-20 17:49:57,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:57,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619157348] [2024-11-20 17:49:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:57,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:57,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:57,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619157348] [2024-11-20 17:49:57,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619157348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:49:57,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:49:57,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:49:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569210602] [2024-11-20 17:49:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:57,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:49:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:49:57,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:49:57,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-20 17:49:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:57,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-20 17:49:57,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:57,453 INFO L124 PetriNetUnfolderBase]: 1591/2593 cut-off events. [2024-11-20 17:49:57,453 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-20 17:49:57,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4817 conditions, 2593 events. 1591/2593 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15431 event pairs, 1210 based on Foata normal form. 0/1928 useless extension candidates. Maximal degree in co-relation 4765. Up to 2155 conditions per place. [2024-11-20 17:49:57,467 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-20 17:49:57,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-11-20 17:49:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:49:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:49:57,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-20 17:49:57,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-11-20 17:49:57,471 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-11-20 17:49:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-11-20 17:49:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:49:57,473 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-11-20 17:49:57,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-20 17:49:57,474 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-11-20 17:49:57,474 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-11-20 17:49:57,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:57,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:57,475 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:49:57,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:49:57,476 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:49:57,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:57,476 INFO L85 PathProgramCache]: Analyzing trace with hash 583755680, now seen corresponding path program 1 times [2024-11-20 17:49:57,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:57,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549524742] [2024-11-20 17:49:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:57,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549524742] [2024-11-20 17:49:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549524742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:57,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678792389] [2024-11-20 17:49:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:57,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:57,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:57,701 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) [2024-11-20 17:49:57,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:49:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:57,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:49:57,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:57,861 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 [2024-11-20 17:49:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:58,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678792389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:49:58,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:49:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:49:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003403627] [2024-11-20 17:49:58,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:49:58,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:49:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:49:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:49:58,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:49:58,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:58,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:58,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:49:58,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:58,605 INFO L124 PetriNetUnfolderBase]: 1592/2595 cut-off events. [2024-11-20 17:49:58,606 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-20 17:49:58,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4854 conditions, 2595 events. 1592/2595 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15452 event pairs, 1210 based on Foata normal form. 0/1935 useless extension candidates. Maximal degree in co-relation 4770. Up to 2164 conditions per place. [2024-11-20 17:49:58,622 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-20 17:49:58,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-11-20 17:49:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:49:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:49:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-11-20 17:49:58,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-11-20 17:49:58,626 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-11-20 17:49:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-11-20 17:49:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:49:58,630 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-11-20 17:49:58,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-11-20 17:49:58,632 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-20 17:49:58,633 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-11-20 17:49:58,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:49:58,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:49:58,633 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:49:58,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:49:58,834 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 [2024-11-20 17:49:58,835 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:49:58,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:49:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 916558703, now seen corresponding path program 1 times [2024-11-20 17:49:58,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:49:58,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288836834] [2024-11-20 17:49:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:49:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:59,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:49:59,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288836834] [2024-11-20 17:49:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288836834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:59,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464476149] [2024-11-20 17:49:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:49:59,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:49:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:49:59,054 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) [2024-11-20 17:49:59,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:49:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:49:59,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:49:59,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:49:59,130 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 [2024-11-20 17:49:59,251 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:49:59,252 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 [2024-11-20 17:49:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:59,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:49:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:49:59,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464476149] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:49:59,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:49:59,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-20 17:49:59,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705466104] [2024-11-20 17:49:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:49:59,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:49:59,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:49:59,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:49:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:49:59,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:49:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-20 17:49:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:49:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:49:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:49:59,969 INFO L124 PetriNetUnfolderBase]: 3176/5161 cut-off events. [2024-11-20 17:49:59,969 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-20 17:49:59,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 5161 events. 3176/5161 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 34576 event pairs, 2420 based on Foata normal form. 2/3848 useless extension candidates. Maximal degree in co-relation 4811. Up to 2158 conditions per place. [2024-11-20 17:50:00,007 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-20 17:50:00,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-11-20 17:50:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:00,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-20 17:50:00,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-20 17:50:00,009 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-11-20 17:50:00,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-11-20 17:50:00,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 17:50:00,013 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-11-20 17:50:00,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-20 17:50:00,013 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-11-20 17:50:00,014 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-11-20 17:50:00,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-20 17:50:00,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:00,014 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:00,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:00,218 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 [2024-11-20 17:50:00,219 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:00,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 344637380, now seen corresponding path program 1 times [2024-11-20 17:50:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:00,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381456557] [2024-11-20 17:50:00,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:00,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:00,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381456557] [2024-11-20 17:50:00,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381456557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682631954] [2024-11-20 17:50:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:00,311 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) [2024-11-20 17:50:00,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:50:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:00,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:50:00,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:00,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682631954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:00,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:00,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:50:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214156578] [2024-11-20 17:50:00,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:00,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:50:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:50:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:50:00,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-20 17:50:00,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 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) [2024-11-20 17:50:00,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:00,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-20 17:50:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:01,433 INFO L124 PetriNetUnfolderBase]: 4764/7744 cut-off events. [2024-11-20 17:50:01,433 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-20 17:50:01,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 7744 events. 4764/7744 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 50395 event pairs, 3630 based on Foata normal form. 2/5771 useless extension candidates. Maximal degree in co-relation 4785. Up to 4290 conditions per place. [2024-11-20 17:50:01,470 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 70 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-11-20 17:50:01,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 113 transitions, 571 flow [2024-11-20 17:50:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:50:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:50:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-20 17:50:01,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-20 17:50:01,472 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 9 states and 298 transitions. [2024-11-20 17:50:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 113 transitions, 571 flow [2024-11-20 17:50:01,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 113 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:01,475 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 373 flow [2024-11-20 17:50:01,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=373, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-11-20 17:50:01,476 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2024-11-20 17:50:01,476 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 373 flow [2024-11-20 17:50:01,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 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) [2024-11-20 17:50:01,476 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:01,476 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:01,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:50:01,680 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 [2024-11-20 17:50:01,681 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:01,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:01,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1482732715, now seen corresponding path program 1 times [2024-11-20 17:50:01,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:01,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619639859] [2024-11-20 17:50:01,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:01,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:01,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:01,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619639859] [2024-11-20 17:50:01,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619639859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:01,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:50:01,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700481747] [2024-11-20 17:50:01,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:01,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:01,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-20 17:50:01,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 373 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-20 17:50:01,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:01,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-20 17:50:01,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:02,731 INFO L124 PetriNetUnfolderBase]: 6124/10015 cut-off events. [2024-11-20 17:50:02,731 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2024-11-20 17:50:02,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18747 conditions, 10015 events. 6124/10015 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 68369 event pairs, 4224 based on Foata normal form. 0/7093 useless extension candidates. Maximal degree in co-relation 6865. Up to 5273 conditions per place. [2024-11-20 17:50:02,777 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 97 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2024-11-20 17:50:02,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 729 flow [2024-11-20 17:50:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:50:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:50:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-11-20 17:50:02,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-20 17:50:02,779 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 373 flow. Second operand 6 states and 228 transitions. [2024-11-20 17:50:02,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 729 flow [2024-11-20 17:50:02,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 659 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-20 17:50:02,783 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 361 flow [2024-11-20 17:50:02,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-11-20 17:50:02,784 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 14 predicate places. [2024-11-20 17:50:02,784 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 361 flow [2024-11-20 17:50:02,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2024-11-20 17:50:02,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:02,784 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:02,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:50:02,785 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:02,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1073711366, now seen corresponding path program 1 times [2024-11-20 17:50:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:02,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75671798] [2024-11-20 17:50:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:02,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75671798] [2024-11-20 17:50:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75671798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:02,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:02,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:50:02,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664528635] [2024-11-20 17:50:02,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:02,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:02,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-20 17:50:02,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-20 17:50:02,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:02,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-20 17:50:02,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:03,508 INFO L124 PetriNetUnfolderBase]: 4074/6689 cut-off events. [2024-11-20 17:50:03,508 INFO L125 PetriNetUnfolderBase]: For 1340/1646 co-relation queries the response was YES. [2024-11-20 17:50:03,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13541 conditions, 6689 events. 4074/6689 cut-off events. For 1340/1646 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 39523 event pairs, 2922 based on Foata normal form. 0/5076 useless extension candidates. Maximal degree in co-relation 5556. Up to 4727 conditions per place. [2024-11-20 17:50:03,535 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-20 17:50:03,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 653 flow [2024-11-20 17:50:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:50:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:50:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-20 17:50:03,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-20 17:50:03,537 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 361 flow. Second operand 6 states and 211 transitions. [2024-11-20 17:50:03,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 653 flow [2024-11-20 17:50:03,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:03,543 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-11-20 17:50:03,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-20 17:50:03,544 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-20 17:50:03,545 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-11-20 17:50:03,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-20 17:50:03,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:03,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-20 17:50:03,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:50:03,547 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:03,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:03,547 INFO L85 PathProgramCache]: Analyzing trace with hash -626935898, now seen corresponding path program 2 times [2024-11-20 17:50:03,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:03,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197149054] [2024-11-20 17:50:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:03,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197149054] [2024-11-20 17:50:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197149054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352767908] [2024-11-20 17:50:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:50:03,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:03,791 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) [2024-11-20 17:50:03,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:50:03,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:50:03,853 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:03,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:50:03,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:03,869 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 [2024-11-20 17:50:03,991 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:50:03,992 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 [2024-11-20 17:50:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:04,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352767908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:04,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:04,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:50:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133452918] [2024-11-20 17:50:04,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:04,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:50:04,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:04,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:50:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:50:04,742 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:50:04,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 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) [2024-11-20 17:50:04,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:04,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:50:04,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:06,255 INFO L124 PetriNetUnfolderBase]: 3861/6238 cut-off events. [2024-11-20 17:50:06,255 INFO L125 PetriNetUnfolderBase]: For 2051/2396 co-relation queries the response was YES. [2024-11-20 17:50:06,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13593 conditions, 6238 events. 3861/6238 cut-off events. For 2051/2396 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38556 event pairs, 3085 based on Foata normal form. 12/4800 useless extension candidates. Maximal degree in co-relation 5521. Up to 3200 conditions per place. [2024-11-20 17:50:06,284 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-11-20 17:50:06,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 823 flow [2024-11-20 17:50:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 17:50:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 17:50:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2024-11-20 17:50:06,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4622395833333333 [2024-11-20 17:50:06,286 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 12 states and 355 transitions. [2024-11-20 17:50:06,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 823 flow [2024-11-20 17:50:06,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 132 transitions, 788 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:06,292 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 482 flow [2024-11-20 17:50:06,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-20 17:50:06,293 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 29 predicate places. [2024-11-20 17:50:06,293 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 482 flow [2024-11-20 17:50:06,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.57894736842105) internal successors, (391), 19 states have internal predecessors, (391), 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) [2024-11-20 17:50:06,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:06,294 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-20 17:50:06,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:06,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:06,499 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:06,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1189957061, now seen corresponding path program 3 times [2024-11-20 17:50:06,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:06,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243172902] [2024-11-20 17:50:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:06,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:06,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243172902] [2024-11-20 17:50:06,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243172902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:06,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37132615] [2024-11-20 17:50:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:50:06,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:06,637 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) [2024-11-20 17:50:06,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:50:06,707 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:50:06,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:06,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:50:06,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:06,723 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 [2024-11-20 17:50:06,810 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-20 17:50:06,810 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 29 treesize of output 33 [2024-11-20 17:50:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:06,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37132615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:07,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-20 17:50:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132995296] [2024-11-20 17:50:07,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:07,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:50:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:50:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:50:07,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:50:07,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 482 flow. Second operand has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 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) [2024-11-20 17:50:07,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:07,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:50:07,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:08,873 INFO L124 PetriNetUnfolderBase]: 3979/6248 cut-off events. [2024-11-20 17:50:08,873 INFO L125 PetriNetUnfolderBase]: For 2075/2367 co-relation queries the response was YES. [2024-11-20 17:50:08,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13965 conditions, 6248 events. 3979/6248 cut-off events. For 2075/2367 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 37930 event pairs, 3262 based on Foata normal form. 6/4800 useless extension candidates. Maximal degree in co-relation 13858. Up to 5549 conditions per place. [2024-11-20 17:50:08,911 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 35 selfloop transitions, 53 changer transitions 0/100 dead transitions. [2024-11-20 17:50:08,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 739 flow [2024-11-20 17:50:08,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:50:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:50:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 469 transitions. [2024-11-20 17:50:08,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36640625 [2024-11-20 17:50:08,914 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 482 flow. Second operand 20 states and 469 transitions. [2024-11-20 17:50:08,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 739 flow [2024-11-20 17:50:08,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 650 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-20 17:50:08,924 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 580 flow [2024-11-20 17:50:08,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=580, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2024-11-20 17:50:08,925 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 35 predicate places. [2024-11-20 17:50:08,925 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 580 flow [2024-11-20 17:50:08,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 20.77777777777778) internal successors, (374), 18 states have internal predecessors, (374), 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) [2024-11-20 17:50:08,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:08,925 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:08,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:09,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 17:50:09,126 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:09,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341589, now seen corresponding path program 1 times [2024-11-20 17:50:09,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:09,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433624282] [2024-11-20 17:50:09,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:09,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:09,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:09,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433624282] [2024-11-20 17:50:09,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433624282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:09,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:09,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:50:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184576157] [2024-11-20 17:50:09,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:09,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:50:09,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:50:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:50:09,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-20 17:50:09,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 580 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-20 17:50:09,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:09,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-20 17:50:09,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:09,522 INFO L124 PetriNetUnfolderBase]: 2920/4587 cut-off events. [2024-11-20 17:50:09,522 INFO L125 PetriNetUnfolderBase]: For 1216/1444 co-relation queries the response was YES. [2024-11-20 17:50:09,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10159 conditions, 4587 events. 2920/4587 cut-off events. For 1216/1444 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 26110 event pairs, 2345 based on Foata normal form. 0/3660 useless extension candidates. Maximal degree in co-relation 5590. Up to 4038 conditions per place. [2024-11-20 17:50:09,541 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 78 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-11-20 17:50:09,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 748 flow [2024-11-20 17:50:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:50:09,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:50:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-20 17:50:09,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-20 17:50:09,543 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 580 flow. Second operand 4 states and 116 transitions. [2024-11-20 17:50:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 748 flow [2024-11-20 17:50:09,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 98 transitions, 551 flow, removed 37 selfloop flow, removed 14 redundant places. [2024-11-20 17:50:09,550 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 395 flow [2024-11-20 17:50:09,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=395, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-11-20 17:50:09,551 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 22 predicate places. [2024-11-20 17:50:09,551 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 395 flow [2024-11-20 17:50:09,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2024-11-20 17:50:09,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:09,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:09,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:50:09,552 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:09,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1461341588, now seen corresponding path program 1 times [2024-11-20 17:50:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:09,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857600984] [2024-11-20 17:50:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:09,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:09,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:09,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857600984] [2024-11-20 17:50:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857600984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:09,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:09,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:50:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438391084] [2024-11-20 17:50:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:09,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:09,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-20 17:50:09,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 395 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-20 17:50:09,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:09,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-20 17:50:09,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:09,972 INFO L124 PetriNetUnfolderBase]: 2988/4757 cut-off events. [2024-11-20 17:50:09,972 INFO L125 PetriNetUnfolderBase]: For 1149/1509 co-relation queries the response was YES. [2024-11-20 17:50:09,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10063 conditions, 4757 events. 2988/4757 cut-off events. For 1149/1509 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 27630 event pairs, 2214 based on Foata normal form. 0/3612 useless extension candidates. Maximal degree in co-relation 4603. Up to 3896 conditions per place. [2024-11-20 17:50:09,994 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 85 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-11-20 17:50:09,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 669 flow [2024-11-20 17:50:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:50:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:50:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 200 transitions. [2024-11-20 17:50:09,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-11-20 17:50:09,996 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 395 flow. Second operand 6 states and 200 transitions. [2024-11-20 17:50:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 669 flow [2024-11-20 17:50:10,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 660 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:10,004 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 439 flow [2024-11-20 17:50:10,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=439, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-11-20 17:50:10,005 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 27 predicate places. [2024-11-20 17:50:10,006 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 439 flow [2024-11-20 17:50:10,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 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) [2024-11-20 17:50:10,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:10,007 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:10,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:50:10,007 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:10,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash 26888348, now seen corresponding path program 1 times [2024-11-20 17:50:10,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:10,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093569713] [2024-11-20 17:50:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:10,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:10,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:10,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093569713] [2024-11-20 17:50:10,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093569713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:10,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:10,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:50:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607126189] [2024-11-20 17:50:10,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:10,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:10,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:10,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-20 17:50:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-20 17:50:10,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:10,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-20 17:50:10,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:10,437 INFO L124 PetriNetUnfolderBase]: 2322/4007 cut-off events. [2024-11-20 17:50:10,438 INFO L125 PetriNetUnfolderBase]: For 1162/1418 co-relation queries the response was YES. [2024-11-20 17:50:10,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8596 conditions, 4007 events. 2322/4007 cut-off events. For 1162/1418 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24681 event pairs, 1720 based on Foata normal form. 0/3277 useless extension candidates. Maximal degree in co-relation 4822. Up to 3145 conditions per place. [2024-11-20 17:50:10,457 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 74 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2024-11-20 17:50:10,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 97 transitions, 607 flow [2024-11-20 17:50:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-20 17:50:10,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-11-20 17:50:10,459 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 439 flow. Second operand 5 states and 129 transitions. [2024-11-20 17:50:10,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 97 transitions, 607 flow [2024-11-20 17:50:10,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 97 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:10,465 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 422 flow [2024-11-20 17:50:10,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-11-20 17:50:10,466 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-11-20 17:50:10,466 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 422 flow [2024-11-20 17:50:10,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-20 17:50:10,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:10,467 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:10,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:50:10,467 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:10,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:10,468 INFO L85 PathProgramCache]: Analyzing trace with hash 26888349, now seen corresponding path program 1 times [2024-11-20 17:50:10,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:10,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913135532] [2024-11-20 17:50:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:10,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:10,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913135532] [2024-11-20 17:50:10,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913135532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:10,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545480694] [2024-11-20 17:50:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:10,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:10,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:10,792 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) [2024-11-20 17:50:10,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:50:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:10,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:50:10,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:10,886 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 [2024-11-20 17:50:10,892 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 [2024-11-20 17:50:10,950 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:50:10,950 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 [2024-11-20 17:50:10,971 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:50:10,972 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 [2024-11-20 17:50:11,093 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-20 17:50:11,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-20 17:50:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:11,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545480694] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:12,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:50:12,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-20 17:50:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722989162] [2024-11-20 17:50:12,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:12,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:50:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:12,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:50:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:50:12,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-20 17:50:12,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 422 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 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) [2024-11-20 17:50:12,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:12,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-20 17:50:12,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:20,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:24,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:28,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:32,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:36,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:40,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:45,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:50:45,198 INFO L124 PetriNetUnfolderBase]: 3769/6196 cut-off events. [2024-11-20 17:50:45,199 INFO L125 PetriNetUnfolderBase]: For 1668/2064 co-relation queries the response was YES. [2024-11-20 17:50:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13555 conditions, 6196 events. 3769/6196 cut-off events. For 1668/2064 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 39464 event pairs, 1463 based on Foata normal form. 0/4867 useless extension candidates. Maximal degree in co-relation 7514. Up to 3154 conditions per place. [2024-11-20 17:50:45,222 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 103 selfloop transitions, 23 changer transitions 0/136 dead transitions. [2024-11-20 17:50:45,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 136 transitions, 800 flow [2024-11-20 17:50:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:50:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:50:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-11-20 17:50:45,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5044642857142857 [2024-11-20 17:50:45,224 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 422 flow. Second operand 7 states and 226 transitions. [2024-11-20 17:50:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 136 transitions, 800 flow [2024-11-20 17:50:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 783 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:45,230 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 496 flow [2024-11-20 17:50:45,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-11-20 17:50:45,230 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-11-20 17:50:45,230 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 496 flow [2024-11-20 17:50:45,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 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) [2024-11-20 17:50:45,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:45,231 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:45,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:50:45,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:45,432 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:45,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 833539474, now seen corresponding path program 1 times [2024-11-20 17:50:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:45,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134007227] [2024-11-20 17:50:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:45,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134007227] [2024-11-20 17:50:45,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134007227] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:45,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:45,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:50:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767066926] [2024-11-20 17:50:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:45,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:45,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:45,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-20 17:50:45,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-11-20 17:50:45,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:45,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-20 17:50:45,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:45,828 INFO L124 PetriNetUnfolderBase]: 2785/4766 cut-off events. [2024-11-20 17:50:45,828 INFO L125 PetriNetUnfolderBase]: For 5605/6141 co-relation queries the response was YES. [2024-11-20 17:50:45,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12441 conditions, 4766 events. 2785/4766 cut-off events. For 5605/6141 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29499 event pairs, 1992 based on Foata normal form. 172/4234 useless extension candidates. Maximal degree in co-relation 7244. Up to 3757 conditions per place. [2024-11-20 17:50:45,846 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 75 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-11-20 17:50:45,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 99 transitions, 670 flow [2024-11-20 17:50:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-20 17:50:45,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 17:50:45,847 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 496 flow. Second operand 5 states and 128 transitions. [2024-11-20 17:50:45,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 99 transitions, 670 flow [2024-11-20 17:50:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:45,853 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 517 flow [2024-11-20 17:50:45,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=517, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-20 17:50:45,854 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 32 predicate places. [2024-11-20 17:50:45,854 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 517 flow [2024-11-20 17:50:45,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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) [2024-11-20 17:50:45,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:45,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:45,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:50:45,855 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:45,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 833539475, now seen corresponding path program 1 times [2024-11-20 17:50:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:45,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803719623] [2024-11-20 17:50:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:45,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:46,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803719623] [2024-11-20 17:50:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803719623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:46,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513835778] [2024-11-20 17:50:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:46,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:46,045 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) [2024-11-20 17:50:46,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:50:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:46,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:50:46,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:46,136 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 [2024-11-20 17:50:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:50:46,180 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 [2024-11-20 17:50:46,188 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:50:46,188 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 [2024-11-20 17:50:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:46,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:46,327 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 [2024-11-20 17:50:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513835778] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:46,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:50:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105948025] [2024-11-20 17:50:46,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:46,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:50:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:50:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:50:46,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-20 17:50:46,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 517 flow. Second operand has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 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) [2024-11-20 17:50:46,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:46,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-20 17:50:46,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:47,286 INFO L124 PetriNetUnfolderBase]: 3787/6078 cut-off events. [2024-11-20 17:50:47,286 INFO L125 PetriNetUnfolderBase]: For 5137/5935 co-relation queries the response was YES. [2024-11-20 17:50:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15889 conditions, 6078 events. 3787/6078 cut-off events. For 5137/5935 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36785 event pairs, 2027 based on Foata normal form. 200/5304 useless extension candidates. Maximal degree in co-relation 9056. Up to 3582 conditions per place. [2024-11-20 17:50:47,317 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-11-20 17:50:47,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 879 flow [2024-11-20 17:50:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:50:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:50:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-11-20 17:50:47,318 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4453125 [2024-11-20 17:50:47,318 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 517 flow. Second operand 8 states and 228 transitions. [2024-11-20 17:50:47,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 879 flow [2024-11-20 17:50:47,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 858 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:47,332 INFO L231 Difference]: Finished difference. Result has 100 places, 100 transitions, 565 flow [2024-11-20 17:50:47,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=565, PETRI_PLACES=100, PETRI_TRANSITIONS=100} [2024-11-20 17:50:47,332 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2024-11-20 17:50:47,333 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 100 transitions, 565 flow [2024-11-20 17:50:47,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 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) [2024-11-20 17:50:47,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:47,333 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:47,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:50:47,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:47,534 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:47,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 19190448, now seen corresponding path program 1 times [2024-11-20 17:50:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439793142] [2024-11-20 17:50:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:47,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439793142] [2024-11-20 17:50:47,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439793142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:47,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960980777] [2024-11-20 17:50:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:47,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:47,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:47,721 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) [2024-11-20 17:50:47,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:50:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:47,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 17:50:47,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:47,830 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 [2024-11-20 17:50:47,907 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:50:47,908 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 [2024-11-20 17:50:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:47,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:48,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960980777] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:48,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:50:48,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-20 17:50:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998080461] [2024-11-20 17:50:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:48,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:50:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:50:48,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:50:48,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-20 17:50:48,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 100 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2024-11-20 17:50:48,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:48,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-20 17:50:48,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:48,836 INFO L124 PetriNetUnfolderBase]: 4946/7937 cut-off events. [2024-11-20 17:50:48,836 INFO L125 PetriNetUnfolderBase]: For 14988/16222 co-relation queries the response was YES. [2024-11-20 17:50:48,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22725 conditions, 7937 events. 4946/7937 cut-off events. For 14988/16222 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 49250 event pairs, 2030 based on Foata normal form. 0/6615 useless extension candidates. Maximal degree in co-relation 13046. Up to 3694 conditions per place. [2024-11-20 17:50:48,875 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 113 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-11-20 17:50:48,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1024 flow [2024-11-20 17:50:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:50:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:50:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-20 17:50:48,876 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-20 17:50:48,876 INFO L175 Difference]: Start difference. First operand has 100 places, 100 transitions, 565 flow. Second operand 7 states and 229 transitions. [2024-11-20 17:50:48,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1024 flow [2024-11-20 17:50:48,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 141 transitions, 974 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:50:48,886 INFO L231 Difference]: Finished difference. Result has 103 places, 104 transitions, 609 flow [2024-11-20 17:50:48,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=103, PETRI_TRANSITIONS=104} [2024-11-20 17:50:48,887 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 40 predicate places. [2024-11-20 17:50:48,887 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 104 transitions, 609 flow [2024-11-20 17:50:48,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2024-11-20 17:50:48,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:48,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:48,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:49,087 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,SelfDestructingSolverStorable16 [2024-11-20 17:50:49,088 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:50:49,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:49,088 INFO L85 PathProgramCache]: Analyzing trace with hash 19190444, now seen corresponding path program 1 times [2024-11-20 17:50:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:49,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332307656] [2024-11-20 17:50:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:49,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:49,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332307656] [2024-11-20 17:50:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332307656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:49,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741620193] [2024-11-20 17:50:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:49,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:49,382 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) [2024-11-20 17:50:49,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:50:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:49,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:50:49,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:49,471 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 [2024-11-20 17:50:49,474 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 [2024-11-20 17:50:49,508 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:50:49,509 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 [2024-11-20 17:50:49,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:50:49,614 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-20 17:50:49,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-20 17:50:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:49,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741620193] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:50,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:50:50,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-20 17:50:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172870240] [2024-11-20 17:50:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:50,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:50:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:50:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:50:50,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-20 17:50:50,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 104 transitions, 609 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2024-11-20 17:50:50,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:50,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-20 17:50:50,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:58,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:02,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:06,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:10,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:14,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:19,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:51:19,272 INFO L124 PetriNetUnfolderBase]: 4514/7095 cut-off events. [2024-11-20 17:51:19,273 INFO L125 PetriNetUnfolderBase]: For 12758/14060 co-relation queries the response was YES. [2024-11-20 17:51:19,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21897 conditions, 7095 events. 4514/7095 cut-off events. For 12758/14060 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 41526 event pairs, 1528 based on Foata normal form. 0/6517 useless extension candidates. Maximal degree in co-relation 12534. Up to 3229 conditions per place. [2024-11-20 17:51:19,309 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 103 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-11-20 17:51:19,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 138 transitions, 1018 flow [2024-11-20 17:51:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:51:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:51:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 227 transitions. [2024-11-20 17:51:19,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066964285714286 [2024-11-20 17:51:19,311 INFO L175 Difference]: Start difference. First operand has 103 places, 104 transitions, 609 flow. Second operand 7 states and 227 transitions. [2024-11-20 17:51:19,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 138 transitions, 1018 flow [2024-11-20 17:51:19,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 138 transitions, 1000 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:51:19,327 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 692 flow [2024-11-20 17:51:19,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-11-20 17:51:19,327 INFO L277 CegarLoopForPetriNet]: 63 programPoint places, 44 predicate places. [2024-11-20 17:51:19,328 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 692 flow [2024-11-20 17:51:19,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2024-11-20 17:51:19,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:51:19,328 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:51:19,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:51:19,528 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,SelfDestructingSolverStorable17 [2024-11-20 17:51:19,529 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:51:19,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:51:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 19190446, now seen corresponding path program 1 times [2024-11-20 17:51:19,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:51:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627914336] [2024-11-20 17:51:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:51:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:19,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:51:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627914336] [2024-11-20 17:51:19,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627914336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:51:19,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956150758] [2024-11-20 17:51:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:51:19,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:51:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:51:19,710 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) [2024-11-20 17:51:19,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:51:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:51:19,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:51:19,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:51:19,801 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 [2024-11-20 17:51:19,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:51:19,831 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 [2024-11-20 17:51:19,837 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:51:19,837 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 [2024-11-20 17:51:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:19,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:51:19,941 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 [2024-11-20 17:51:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:51:19,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956150758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:51:19,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:51:19,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:51:19,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405348928] [2024-11-20 17:51:19,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:51:19,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:51:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:51:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:51:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:51:24,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]