./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC --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 e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:07:29,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:07:29,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 00:07:29,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:07:29,877 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:07:29,901 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:07:29,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:07:29,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:07:29,902 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:07:29,902 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:07:29,902 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:07:29,903 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:07:29,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:07:29,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:07:29,903 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:07:29,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:07:29,904 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:07:29,905 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:07:29,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:07:29,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:07:29,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:07:29,906 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:07:29,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:07:29,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:07:29,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:07:29,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:07:29,908 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:07:29,908 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC 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 -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2024-11-24 00:07:30,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:07:30,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:07:30,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:07:30,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:07:30,258 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:07:30,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2024-11-24 00:07:33,222 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/data/4abc791cf/bbf57fb549e548fabc09d52ad412e81e/FLAG01cdda7cc [2024-11-24 00:07:33,561 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:07:33,562 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2024-11-24 00:07:33,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/data/4abc791cf/bbf57fb549e548fabc09d52ad412e81e/FLAG01cdda7cc [2024-11-24 00:07:33,791 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/data/4abc791cf/bbf57fb549e548fabc09d52ad412e81e [2024-11-24 00:07:33,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:07:33,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:07:33,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:07:33,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:07:33,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:07:33,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:07:33" (1/1) ... [2024-11-24 00:07:33,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f842e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:33, skipping insertion in model container [2024-11-24 00:07:33,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:07:33" (1/1) ... [2024-11-24 00:07:33,829 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:07:34,085 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:07:34,086 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:07:34,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:07:34,107 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:07:34,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:07:34,177 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:07:34,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34 WrapperNode [2024-11-24 00:07:34,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:07:34,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:07:34,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:07:34,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:07:34,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,220 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-11-24 00:07:34,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:07:34,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:07:34,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:07:34,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:07:34,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,233 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,244 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [4, 5]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-24 00:07:34,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,250 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,254 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,255 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:07:34,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:07:34,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:07:34,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:07:34,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (1/1) ... [2024-11-24 00:07:34,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:07:34,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:34,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:07:34,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:07:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:07:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:07:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:07:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:07:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-24 00:07:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-24 00:07:34,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:07:34,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:07:34,451 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:07:34,453 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:07:34,687 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-24 00:07:34,687 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:07:34,697 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:07:34,697 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-24 00:07:34,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:07:34 BoogieIcfgContainer [2024-11-24 00:07:34,698 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:07:34,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:07:34,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:07:34,707 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:07:34,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:07:33" (1/3) ... [2024-11-24 00:07:34,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62014e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:07:34, skipping insertion in model container [2024-11-24 00:07:34,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:07:34" (2/3) ... [2024-11-24 00:07:34,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62014e63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:07:34, skipping insertion in model container [2024-11-24 00:07:34,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:07:34" (3/3) ... [2024-11-24 00:07:34,711 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2024-11-24 00:07:34,731 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:07:34,733 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrncmp-alloca-2.i that has 1 procedures, 54 locations, 1 initial locations, 3 loop locations, and 19 error locations. [2024-11-24 00:07:34,778 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:07:34,798 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;@26c8a0f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:07:34,798 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-24 00:07:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:07:34,810 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:34,810 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:34,811 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:34,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-11-24 00:07:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:34,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739111772] [2024-11-24 00:07:34,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:34,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:35,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739111772] [2024-11-24 00:07:35,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739111772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:35,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:35,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022084739] [2024-11-24 00:07:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:35,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:35,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:35,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:35,136 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:35,191 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2024-11-24 00:07:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) Word has length 8 [2024-11-24 00:07:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:35,200 INFO L225 Difference]: With dead ends: 67 [2024-11-24 00:07:35,200 INFO L226 Difference]: Without dead ends: 65 [2024-11-24 00:07:35,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:35,204 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:35,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-24 00:07:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2024-11-24 00:07:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 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) [2024-11-24 00:07:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-24 00:07:35,239 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 8 [2024-11-24 00:07:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:35,240 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-24 00:07:35,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-24 00:07:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:07:35,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:35,241 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:35,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:07:35,241 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:35,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash 178583535, now seen corresponding path program 1 times [2024-11-24 00:07:35,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:35,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720865696] [2024-11-24 00:07:35,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:35,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:35,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:35,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720865696] [2024-11-24 00:07:35,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720865696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:35,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:35,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:07:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984142644] [2024-11-24 00:07:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:35,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:07:35,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:35,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:07:35,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:07:35,394 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:35,469 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-24 00:07:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:07:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2024-11-24 00:07:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:35,470 INFO L225 Difference]: With dead ends: 53 [2024-11-24 00:07:35,470 INFO L226 Difference]: Without dead ends: 53 [2024-11-24 00:07:35,471 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:07:35,472 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:35,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-24 00:07:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-24 00:07:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 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) [2024-11-24 00:07:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-24 00:07:35,480 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 8 [2024-11-24 00:07:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:35,481 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-24 00:07:35,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-24 00:07:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:07:35,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:35,481 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:35,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:07:35,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:35,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:35,483 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-11-24 00:07:35,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:35,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099683584] [2024-11-24 00:07:35,483 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:35,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:35,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:35,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099683584] [2024-11-24 00:07:35,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099683584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:35,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:35,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:35,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48381619] [2024-11-24 00:07:35,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:35,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:35,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:35,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:35,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:35,786 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:35,886 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-11-24 00:07:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) Word has length 8 [2024-11-24 00:07:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:35,887 INFO L225 Difference]: With dead ends: 57 [2024-11-24 00:07:35,887 INFO L226 Difference]: Without dead ends: 57 [2024-11-24 00:07:35,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:07:35,888 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 25 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:35,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 121 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-24 00:07:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2024-11-24 00:07:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2024-11-24 00:07:35,894 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 8 [2024-11-24 00:07:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:35,894 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2024-11-24 00:07:35,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-24 00:07:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2024-11-24 00:07:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 00:07:35,895 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:35,895 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:35,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:07:35,896 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:35,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 631530201, now seen corresponding path program 1 times [2024-11-24 00:07:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407345601] [2024-11-24 00:07:35,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:35,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407345601] [2024-11-24 00:07:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407345601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:35,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405878478] [2024-11-24 00:07:35,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:35,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:35,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:35,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:35,991 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:36,023 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2024-11-24 00:07:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:36,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 10 [2024-11-24 00:07:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:36,025 INFO L225 Difference]: With dead ends: 74 [2024-11-24 00:07:36,026 INFO L226 Difference]: Without dead ends: 74 [2024-11-24 00:07:36,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:36,052 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:36,053 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-24 00:07:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-11-24 00:07:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 67 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-11-24 00:07:36,063 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 10 [2024-11-24 00:07:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:36,063 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-11-24 00:07:36,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-11-24 00:07:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 00:07:36,065 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:36,066 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:36,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-24 00:07:36,066 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:36,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 631532380, now seen corresponding path program 1 times [2024-11-24 00:07:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381544499] [2024-11-24 00:07:36,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:36,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:36,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:36,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381544499] [2024-11-24 00:07:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381544499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:36,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:36,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:07:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716252853] [2024-11-24 00:07:36,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:36,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:36,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:36,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:36,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:36,306 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:36,336 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2024-11-24 00:07:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) Word has length 10 [2024-11-24 00:07:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:36,338 INFO L225 Difference]: With dead ends: 79 [2024-11-24 00:07:36,338 INFO L226 Difference]: Without dead ends: 79 [2024-11-24 00:07:36,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:36,339 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:36,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-24 00:07:36,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-11-24 00:07:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 76 states have internal predecessors, (92), 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) [2024-11-24 00:07:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-11-24 00:07:36,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 10 [2024-11-24 00:07:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:36,351 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-11-24 00:07:36,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-11-24 00:07:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 00:07:36,353 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:36,354 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:36,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 00:07:36,355 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:36,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:36,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429733, now seen corresponding path program 1 times [2024-11-24 00:07:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:36,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829972576] [2024-11-24 00:07:36,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:36,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:36,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829972576] [2024-11-24 00:07:36,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829972576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:36,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:36,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:07:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456102006] [2024-11-24 00:07:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:36,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:07:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:36,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:07:36,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:07:36,419 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:36,471 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-11-24 00:07:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:07:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) Word has length 10 [2024-11-24 00:07:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:36,472 INFO L225 Difference]: With dead ends: 75 [2024-11-24 00:07:36,473 INFO L226 Difference]: Without dead ends: 75 [2024-11-24 00:07:36,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:07:36,473 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:36,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 69 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-24 00:07:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-24 00:07:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 74 states have internal predecessors, (89), 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) [2024-11-24 00:07:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2024-11-24 00:07:36,482 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 10 [2024-11-24 00:07:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:36,482 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2024-11-24 00:07:36,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2024-11-24 00:07:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 00:07:36,483 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:36,483 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:36,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-24 00:07:36,483 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:36,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:36,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429732, now seen corresponding path program 1 times [2024-11-24 00:07:36,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223072815] [2024-11-24 00:07:36,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:36,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:36,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:36,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223072815] [2024-11-24 00:07:36,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223072815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:36,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:36,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:07:36,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81620418] [2024-11-24 00:07:36,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:36,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:07:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:36,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:07:36,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:07:36,716 INFO L87 Difference]: Start difference. First operand 75 states and 89 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:36,849 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2024-11-24 00:07:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:07:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) Word has length 10 [2024-11-24 00:07:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:36,851 INFO L225 Difference]: With dead ends: 83 [2024-11-24 00:07:36,852 INFO L226 Difference]: Without dead ends: 83 [2024-11-24 00:07:36,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:36,852 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:36,853 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 126 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-24 00:07:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-24 00:07:36,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 80 states have internal predecessors, (97), 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) [2024-11-24 00:07:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-11-24 00:07:36,860 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 10 [2024-11-24 00:07:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:36,860 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-11-24 00:07:36,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2024-11-24 00:07:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-11-24 00:07:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-24 00:07:36,861 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:36,861 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:36,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:07:36,862 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:36,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash -177814246, now seen corresponding path program 1 times [2024-11-24 00:07:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727372139] [2024-11-24 00:07:36,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:37,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727372139] [2024-11-24 00:07:37,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727372139] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:37,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:37,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850852964] [2024-11-24 00:07:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:37,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:37,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:37,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:37,134 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-24 00:07:37,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:37,229 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2024-11-24 00:07:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) Word has length 10 [2024-11-24 00:07:37,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:37,230 INFO L225 Difference]: With dead ends: 96 [2024-11-24 00:07:37,232 INFO L226 Difference]: Without dead ends: 96 [2024-11-24 00:07:37,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:37,233 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 27 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:37,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 116 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-24 00:07:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2024-11-24 00:07:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 80 states have internal predecessors, (97), 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) [2024-11-24 00:07:37,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2024-11-24 00:07:37,241 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 10 [2024-11-24 00:07:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:37,241 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2024-11-24 00:07:37,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2024-11-24 00:07:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2024-11-24 00:07:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-24 00:07:37,246 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:37,246 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:37,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-24 00:07:37,247 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:37,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1897332705, now seen corresponding path program 1 times [2024-11-24 00:07:37,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:37,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124384152] [2024-11-24 00:07:37,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124384152] [2024-11-24 00:07:37,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124384152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:37,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:37,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:07:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842199064] [2024-11-24 00:07:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:37,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:37,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:37,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:37,394 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-24 00:07:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:37,472 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-11-24 00:07:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 11 [2024-11-24 00:07:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:37,473 INFO L225 Difference]: With dead ends: 88 [2024-11-24 00:07:37,473 INFO L226 Difference]: Without dead ends: 88 [2024-11-24 00:07:37,473 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:37,474 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:37,474 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 125 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-24 00:07:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-24 00:07:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 85 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) [2024-11-24 00:07:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2024-11-24 00:07:37,481 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 11 [2024-11-24 00:07:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:37,481 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2024-11-24 00:07:37,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2024-11-24 00:07:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2024-11-24 00:07:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-24 00:07:37,485 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:37,485 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:37,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 00:07:37,485 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:37,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1588287965, now seen corresponding path program 1 times [2024-11-24 00:07:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:37,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353209819] [2024-11-24 00:07:37,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:37,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:37,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353209819] [2024-11-24 00:07:37,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353209819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:37,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:37,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604621163] [2024-11-24 00:07:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:37,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:37,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:37,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:37,649 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-24 00:07:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:37,706 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2024-11-24 00:07:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) Word has length 11 [2024-11-24 00:07:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:37,707 INFO L225 Difference]: With dead ends: 85 [2024-11-24 00:07:37,707 INFO L226 Difference]: Without dead ends: 85 [2024-11-24 00:07:37,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:37,708 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:37,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-24 00:07:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-11-24 00:07:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 79 states have internal predecessors, (96), 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) [2024-11-24 00:07:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2024-11-24 00:07:37,716 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 11 [2024-11-24 00:07:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:37,716 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2024-11-24 00:07:37,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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) [2024-11-24 00:07:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2024-11-24 00:07:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-24 00:07:37,720 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:37,720 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:37,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 00:07:37,720 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:37,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-11-24 00:07:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:37,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708438616] [2024-11-24 00:07:37,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:38,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708438616] [2024-11-24 00:07:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708438616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37526667] [2024-11-24 00:07:38,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:38,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:38,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:38,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:07:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:38,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 00:07:38,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:07:38,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-24 00:07:38,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-24 00:07:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:38,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:38,716 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:07:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37526667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:38,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:38,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-24 00:07:38,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321002624] [2024-11-24 00:07:38,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:38,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 00:07:38,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:38,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 00:07:38,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:07:38,742 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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) [2024-11-24 00:07:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:39,023 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2024-11-24 00:07:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:07:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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) Word has length 12 [2024-11-24 00:07:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:39,024 INFO L225 Difference]: With dead ends: 83 [2024-11-24 00:07:39,024 INFO L226 Difference]: Without dead ends: 83 [2024-11-24 00:07:39,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:07:39,025 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:39,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 196 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:07:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-24 00:07:39,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-11-24 00:07:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 74 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-11-24 00:07:39,029 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 12 [2024-11-24 00:07:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:39,029 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-11-24 00:07:39,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 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) [2024-11-24 00:07:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-11-24 00:07:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-24 00:07:39,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:39,030 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:39,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 00:07:39,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:39,234 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:39,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:39,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001118, now seen corresponding path program 1 times [2024-11-24 00:07:39,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:39,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437957381] [2024-11-24 00:07:39,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:39,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:39,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437957381] [2024-11-24 00:07:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437957381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:07:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003869881] [2024-11-24 00:07:39,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:39,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:39,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:39,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:39,322 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-24 00:07:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:39,381 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2024-11-24 00:07:39,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 14 [2024-11-24 00:07:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:39,382 INFO L225 Difference]: With dead ends: 74 [2024-11-24 00:07:39,382 INFO L226 Difference]: Without dead ends: 74 [2024-11-24 00:07:39,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:39,383 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:39,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 71 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-24 00:07:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2024-11-24 00:07:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 72 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2024-11-24 00:07:39,389 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 14 [2024-11-24 00:07:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:39,389 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2024-11-24 00:07:39,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-11-24 00:07:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2024-11-24 00:07:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-24 00:07:39,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:39,390 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:39,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-24 00:07:39,390 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:39,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1669001117, now seen corresponding path program 1 times [2024-11-24 00:07:39,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:39,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316994510] [2024-11-24 00:07:39,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:39,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:39,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316994510] [2024-11-24 00:07:39,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316994510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:39,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:39,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:07:39,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668961993] [2024-11-24 00:07:39,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:39,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:07:39,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:39,516 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:07:39,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:07:39,516 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-24 00:07:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:39,624 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2024-11-24 00:07:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:07:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) Word has length 14 [2024-11-24 00:07:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:39,625 INFO L225 Difference]: With dead ends: 86 [2024-11-24 00:07:39,625 INFO L226 Difference]: Without dead ends: 86 [2024-11-24 00:07:39,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:39,626 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:39,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 155 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-24 00:07:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2024-11-24 00:07:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 77 states have internal predecessors, (96), 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) [2024-11-24 00:07:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-11-24 00:07:39,629 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 14 [2024-11-24 00:07:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:39,630 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-11-24 00:07:39,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2024-11-24 00:07:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-11-24 00:07:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-24 00:07:39,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:39,631 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:39,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-24 00:07:39,631 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:39,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1315344789, now seen corresponding path program 1 times [2024-11-24 00:07:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:39,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43608170] [2024-11-24 00:07:39,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43608170] [2024-11-24 00:07:39,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43608170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:39,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171669674] [2024-11-24 00:07:39,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:39,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:07:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:40,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:07:40,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:40,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2024-11-24 00:07:40,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:07:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:40,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:40,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171669674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:40,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:40,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-24 00:07:40,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251726044] [2024-11-24 00:07:40,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:40,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:07:40,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:40,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:07:40,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:07:40,603 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-11-24 00:07:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:40,920 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2024-11-24 00:07:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:07:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) Word has length 14 [2024-11-24 00:07:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:40,923 INFO L225 Difference]: With dead ends: 81 [2024-11-24 00:07:40,923 INFO L226 Difference]: Without dead ends: 81 [2024-11-24 00:07:40,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2024-11-24 00:07:40,924 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:40,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 267 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:07:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-24 00:07:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2024-11-24 00:07:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 70 states have internal predecessors, (86), 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) [2024-11-24 00:07:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2024-11-24 00:07:40,928 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 14 [2024-11-24 00:07:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:40,928 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2024-11-24 00:07:40,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 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) [2024-11-24 00:07:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2024-11-24 00:07:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-24 00:07:40,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:40,929 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:40,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 00:07:41,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 00:07:41,132 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:41,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash 61543571, now seen corresponding path program 1 times [2024-11-24 00:07:41,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:41,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168644117] [2024-11-24 00:07:41,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168644117] [2024-11-24 00:07:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168644117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:41,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:41,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:07:41,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733356835] [2024-11-24 00:07:41,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:41,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:07:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:41,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:07:41,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:41,404 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-24 00:07:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:41,470 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2024-11-24 00:07:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:07:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 14 [2024-11-24 00:07:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:41,471 INFO L225 Difference]: With dead ends: 70 [2024-11-24 00:07:41,471 INFO L226 Difference]: Without dead ends: 70 [2024-11-24 00:07:41,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:41,472 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:41,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:41,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-24 00:07:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2024-11-24 00:07:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.42) internal successors, (71), 58 states have internal predecessors, (71), 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) [2024-11-24 00:07:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2024-11-24 00:07:41,478 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 14 [2024-11-24 00:07:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:41,478 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2024-11-24 00:07:41,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-24 00:07:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2024-11-24 00:07:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-24 00:07:41,479 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:41,479 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:41,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 00:07:41,479 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:41,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash -199427742, now seen corresponding path program 1 times [2024-11-24 00:07:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83013529] [2024-11-24 00:07:41,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:41,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:41,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83013529] [2024-11-24 00:07:41,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83013529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:41,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:41,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:07:41,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621140135] [2024-11-24 00:07:41,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:41,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:07:41,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:41,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:07:41,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:41,634 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-24 00:07:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:41,672 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-11-24 00:07:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:07:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 15 [2024-11-24 00:07:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:41,673 INFO L225 Difference]: With dead ends: 58 [2024-11-24 00:07:41,673 INFO L226 Difference]: Without dead ends: 54 [2024-11-24 00:07:41,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:07:41,674 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:41,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-24 00:07:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-24 00:07:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 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) [2024-11-24 00:07:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-24 00:07:41,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 15 [2024-11-24 00:07:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:41,676 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-24 00:07:41,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-11-24 00:07:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-24 00:07:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-24 00:07:41,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:41,678 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:41,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-24 00:07:41,678 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:41,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:41,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1887271709, now seen corresponding path program 1 times [2024-11-24 00:07:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929977145] [2024-11-24 00:07:41,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:41,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929977145] [2024-11-24 00:07:41,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929977145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:41,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323803030] [2024-11-24 00:07:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:41,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:41,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:41,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:41,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:41,743 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-11-24 00:07:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:41,809 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-24 00:07:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) Word has length 16 [2024-11-24 00:07:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:41,810 INFO L225 Difference]: With dead ends: 53 [2024-11-24 00:07:41,810 INFO L226 Difference]: Without dead ends: 53 [2024-11-24 00:07:41,810 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:07:41,811 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:41,811 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:41,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-24 00:07:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-24 00:07:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 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) [2024-11-24 00:07:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-24 00:07:41,814 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2024-11-24 00:07:41,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:41,814 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-24 00:07:41,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2024-11-24 00:07:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-24 00:07:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-24 00:07:41,814 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:41,815 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:41,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 00:07:41,815 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:41,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1887271708, now seen corresponding path program 1 times [2024-11-24 00:07:41,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:41,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206063613] [2024-11-24 00:07:41,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:42,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206063613] [2024-11-24 00:07:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206063613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:42,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:07:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540942809] [2024-11-24 00:07:42,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:42,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:07:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:42,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:07:42,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:42,024 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-11-24 00:07:42,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:42,133 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-11-24 00:07:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:07:42,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) Word has length 16 [2024-11-24 00:07:42,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:42,134 INFO L225 Difference]: With dead ends: 59 [2024-11-24 00:07:42,134 INFO L226 Difference]: Without dead ends: 59 [2024-11-24 00:07:42,134 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:07:42,135 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:42,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 113 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-24 00:07:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2024-11-24 00:07:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 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) [2024-11-24 00:07:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-24 00:07:42,137 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 16 [2024-11-24 00:07:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:42,137 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-24 00:07:42,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2024-11-24 00:07:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-24 00:07:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 00:07:42,138 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:42,138 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:42,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-24 00:07:42,138 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:42,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:42,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1191911644, now seen corresponding path program 1 times [2024-11-24 00:07:42,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:42,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84946856] [2024-11-24 00:07:42,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:42,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:42,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84946856] [2024-11-24 00:07:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84946856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:42,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:42,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:42,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169370395] [2024-11-24 00:07:42,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:42,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:42,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:42,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:42,209 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-24 00:07:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:42,267 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-24 00:07:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) Word has length 18 [2024-11-24 00:07:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:42,268 INFO L225 Difference]: With dead ends: 52 [2024-11-24 00:07:42,268 INFO L226 Difference]: Without dead ends: 52 [2024-11-24 00:07:42,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:07:42,269 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:42,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 75 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-24 00:07:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-24 00:07:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-24 00:07:42,271 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 18 [2024-11-24 00:07:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:42,271 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-24 00:07:42,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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) [2024-11-24 00:07:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-24 00:07:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-24 00:07:42,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:42,272 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:42,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-24 00:07:42,273 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:42,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:42,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1191911643, now seen corresponding path program 1 times [2024-11-24 00:07:42,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:42,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531202780] [2024-11-24 00:07:42,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:42,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:42,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531202780] [2024-11-24 00:07:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531202780] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:42,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:42,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:07:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154293037] [2024-11-24 00:07:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:42,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:07:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:42,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:07:42,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:07:42,450 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2024-11-24 00:07:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:42,558 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-11-24 00:07:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:07:42,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) Word has length 18 [2024-11-24 00:07:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:42,559 INFO L225 Difference]: With dead ends: 68 [2024-11-24 00:07:42,559 INFO L226 Difference]: Without dead ends: 68 [2024-11-24 00:07:42,560 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:07:42,560 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:42,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 135 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-24 00:07:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2024-11-24 00:07:42,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 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) [2024-11-24 00:07:42,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-24 00:07:42,562 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 18 [2024-11-24 00:07:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:42,566 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-24 00:07:42,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2024-11-24 00:07:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-24 00:07:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-24 00:07:42,567 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:42,567 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:42,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-24 00:07:42,567 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:42,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1328872229, now seen corresponding path program 1 times [2024-11-24 00:07:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:42,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30369698] [2024-11-24 00:07:42,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:42,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30369698] [2024-11-24 00:07:42,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30369698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:42,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:42,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:07:42,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082728067] [2024-11-24 00:07:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:42,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:07:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:42,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:07:42,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:42,656 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-24 00:07:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:42,698 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-24 00:07:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:07:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) Word has length 20 [2024-11-24 00:07:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:42,698 INFO L225 Difference]: With dead ends: 52 [2024-11-24 00:07:42,699 INFO L226 Difference]: Without dead ends: 52 [2024-11-24 00:07:42,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:07:42,699 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:42,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:07:42,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-24 00:07:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-24 00:07:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-11-24 00:07:42,701 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 20 [2024-11-24 00:07:42,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:42,702 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-11-24 00:07:42,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-24 00:07:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-11-24 00:07:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-24 00:07:42,702 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:42,702 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:42,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-24 00:07:42,702 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:42,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1328872230, now seen corresponding path program 1 times [2024-11-24 00:07:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:42,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578445168] [2024-11-24 00:07:42,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578445168] [2024-11-24 00:07:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578445168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:42,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:07:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977795382] [2024-11-24 00:07:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:42,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:07:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:42,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:07:42,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:07:42,961 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-24 00:07:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:43,112 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-11-24 00:07:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:07:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) Word has length 20 [2024-11-24 00:07:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:43,116 INFO L225 Difference]: With dead ends: 65 [2024-11-24 00:07:43,116 INFO L226 Difference]: Without dead ends: 62 [2024-11-24 00:07:43,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:07:43,118 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:43,118 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 137 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-24 00:07:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2024-11-24 00:07:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-24 00:07:43,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 20 [2024-11-24 00:07:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:43,122 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-24 00:07:43,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 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) [2024-11-24 00:07:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-24 00:07:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-24 00:07:43,122 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:43,122 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:43,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-24 00:07:43,123 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:43,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:43,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1745086753, now seen corresponding path program 1 times [2024-11-24 00:07:43,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:43,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465448327] [2024-11-24 00:07:43,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465448327] [2024-11-24 00:07:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465448327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:07:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560902771] [2024-11-24 00:07:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:43,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:07:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:43,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:07:43,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:07:43,356 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-24 00:07:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:43,412 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2024-11-24 00:07:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:07:43,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) Word has length 21 [2024-11-24 00:07:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:43,413 INFO L225 Difference]: With dead ends: 69 [2024-11-24 00:07:43,413 INFO L226 Difference]: Without dead ends: 46 [2024-11-24 00:07:43,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:07:43,414 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:43,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 172 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-24 00:07:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-24 00:07:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-11-24 00:07:43,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2024-11-24 00:07:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:43,416 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-11-24 00:07:43,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2024-11-24 00:07:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-11-24 00:07:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-24 00:07:43,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:43,416 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:43,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-24 00:07:43,416 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:43,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 860936801, now seen corresponding path program 1 times [2024-11-24 00:07:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956665272] [2024-11-24 00:07:43,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956665272] [2024-11-24 00:07:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956665272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:43,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:43,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-24 00:07:43,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971660317] [2024-11-24 00:07:43,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:43,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:07:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:43,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:07:43,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:07:43,699 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-11-24 00:07:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:43,781 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-11-24 00:07:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:07:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) Word has length 21 [2024-11-24 00:07:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:43,782 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:07:43,782 INFO L226 Difference]: Without dead ends: 54 [2024-11-24 00:07:43,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:07:43,783 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:43,783 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 175 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-24 00:07:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-11-24 00:07:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:43,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-24 00:07:43,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2024-11-24 00:07:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:43,785 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-24 00:07:43,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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) [2024-11-24 00:07:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-24 00:07:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 00:07:43,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:43,786 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:43,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-24 00:07:43,786 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:43,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash -947104440, now seen corresponding path program 1 times [2024-11-24 00:07:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:43,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586571816] [2024-11-24 00:07:43,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:43,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:44,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586571816] [2024-11-24 00:07:44,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586571816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:44,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084515041] [2024-11-24 00:07:44,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:44,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:44,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:44,015 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:44,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:07:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:44,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 00:07:44,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:44,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:44,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084515041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:44,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:44,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-11-24 00:07:44,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197124774] [2024-11-24 00:07:44,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:44,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 00:07:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:44,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 00:07:44,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:07:44,442 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:44,635 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-11-24 00:07:44,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:07:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-24 00:07:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:44,636 INFO L225 Difference]: With dead ends: 61 [2024-11-24 00:07:44,636 INFO L226 Difference]: Without dead ends: 61 [2024-11-24 00:07:44,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:07:44,637 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:44,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 194 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-24 00:07:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2024-11-24 00:07:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 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) [2024-11-24 00:07:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-11-24 00:07:44,640 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 25 [2024-11-24 00:07:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:44,640 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-11-24 00:07:44,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-11-24 00:07:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:07:44,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:44,641 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:44,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:07:44,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-24 00:07:44,845 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:44,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash 365700233, now seen corresponding path program 1 times [2024-11-24 00:07:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:44,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677571619] [2024-11-24 00:07:44,846 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:44,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677571619] [2024-11-24 00:07:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677571619] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:45,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:45,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 00:07:45,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542081158] [2024-11-24 00:07:45,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:45,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:07:45,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:45,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:07:45,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:07:45,231 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2024-11-24 00:07:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:45,338 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2024-11-24 00:07:45,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:07:45,338 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) Word has length 27 [2024-11-24 00:07:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:45,338 INFO L225 Difference]: With dead ends: 61 [2024-11-24 00:07:45,339 INFO L226 Difference]: Without dead ends: 42 [2024-11-24 00:07:45,339 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:07:45,339 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:45,340 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-24 00:07:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-24 00:07:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 41 states have internal predecessors, (44), 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) [2024-11-24 00:07:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-24 00:07:45,342 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 27 [2024-11-24 00:07:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:45,342 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-24 00:07:45,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2024-11-24 00:07:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-24 00:07:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:07:45,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:45,343 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:45,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-24 00:07:45,343 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:45,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 231686727, now seen corresponding path program 1 times [2024-11-24 00:07:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140850147] [2024-11-24 00:07:45,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140850147] [2024-11-24 00:07:45,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140850147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:07:45,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:07:45,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-24 00:07:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798318743] [2024-11-24 00:07:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:07:45,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:07:45,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:45,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:07:45,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:07:45,786 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2024-11-24 00:07:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:45,940 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-24 00:07:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:07:45,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) Word has length 27 [2024-11-24 00:07:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:45,941 INFO L225 Difference]: With dead ends: 57 [2024-11-24 00:07:45,941 INFO L226 Difference]: Without dead ends: 46 [2024-11-24 00:07:45,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:07:45,942 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:45,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 205 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-24 00:07:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-24 00:07:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 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) [2024-11-24 00:07:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-24 00:07:45,945 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2024-11-24 00:07:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:45,945 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-24 00:07:45,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2024-11-24 00:07:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-24 00:07:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-24 00:07:45,946 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:45,946 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:45,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-24 00:07:45,946 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:45,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1526484434, now seen corresponding path program 1 times [2024-11-24 00:07:45,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:45,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941192970] [2024-11-24 00:07:45,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:45,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:46,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:46,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941192970] [2024-11-24 00:07:46,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941192970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600087968] [2024-11-24 00:07:46,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:46,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:46,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:46,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:46,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:07:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:46,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 00:07:46,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:46,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:46,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:46,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:07:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:46,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600087968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:46,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:46,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-11-24 00:07:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816221740] [2024-11-24 00:07:46,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:46,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:07:46,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:46,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:07:46,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:07:46,713 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:46,940 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2024-11-24 00:07:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:07:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-24 00:07:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:46,941 INFO L225 Difference]: With dead ends: 48 [2024-11-24 00:07:46,941 INFO L226 Difference]: Without dead ends: 48 [2024-11-24 00:07:46,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:07:46,942 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:46,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 199 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:07:46,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-24 00:07:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-11-24 00:07:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-11-24 00:07:46,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2024-11-24 00:07:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:46,945 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-11-24 00:07:46,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-11-24 00:07:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:07:46,946 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:46,946 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:46,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 00:07:47,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 00:07:47,151 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:47,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1927274991, now seen corresponding path program 1 times [2024-11-24 00:07:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:47,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493116377] [2024-11-24 00:07:47,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:07:47,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493116377] [2024-11-24 00:07:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493116377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:47,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604660393] [2024-11-24 00:07:47,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:47,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:47,262 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:47,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:07:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:47,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-24 00:07:47,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:47,408 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2024-11-24 00:07:47,408 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 1 case distinctions, treesize of input 13 treesize of output 19 [2024-11-24 00:07:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:48,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604660393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:49,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 14] total 33 [2024-11-24 00:07:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693600779] [2024-11-24 00:07:49,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:49,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-24 00:07:49,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:49,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-24 00:07:49,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2024-11-24 00:07:49,200 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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) [2024-11-24 00:07:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:50,295 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-11-24 00:07:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-24 00:07:50,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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) Word has length 33 [2024-11-24 00:07:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:50,296 INFO L225 Difference]: With dead ends: 116 [2024-11-24 00:07:50,297 INFO L226 Difference]: Without dead ends: 116 [2024-11-24 00:07:50,298 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=289, Invalid=1781, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:07:50,298 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:50,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 261 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:07:50,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-24 00:07:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 44. [2024-11-24 00:07:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 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) [2024-11-24 00:07:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-24 00:07:50,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2024-11-24 00:07:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:50,301 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-24 00:07:50,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 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) [2024-11-24 00:07:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-24 00:07:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-24 00:07:50,302 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:50,302 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:50,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:07:50,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 00:07:50,503 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:50,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:50,503 INFO L85 PathProgramCache]: Analyzing trace with hash 980054896, now seen corresponding path program 1 times [2024-11-24 00:07:50,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:50,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028642804] [2024-11-24 00:07:50,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:50,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028642804] [2024-11-24 00:07:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028642804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752323346] [2024-11-24 00:07:50,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:50,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:50,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:07:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:50,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 00:07:50,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:51,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:51,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:07:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752323346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:51,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2024-11-24 00:07:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495118247] [2024-11-24 00:07:51,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:51,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 00:07:51,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:51,400 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 00:07:51,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:07:51,401 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:51,645 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-11-24 00:07:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:07:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-24 00:07:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:51,647 INFO L225 Difference]: With dead ends: 57 [2024-11-24 00:07:51,647 INFO L226 Difference]: Without dead ends: 54 [2024-11-24 00:07:51,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:07:51,648 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:51,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 243 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:07:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-24 00:07:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2024-11-24 00:07:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2024-11-24 00:07:51,652 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 35 [2024-11-24 00:07:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:51,652 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2024-11-24 00:07:51,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2024-11-24 00:07:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-24 00:07:51,653 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:51,653 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:51,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 00:07:51,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:51,857 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:51,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 326477781, now seen corresponding path program 1 times [2024-11-24 00:07:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631899283] [2024-11-24 00:07:51,858 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631899283] [2024-11-24 00:07:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631899283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979923477] [2024-11-24 00:07:52,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:07:52,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:52,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:52,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:07:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:07:52,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 00:07:52,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:52,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:07:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:52,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:52,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:07:52,879 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 16 treesize of output 12 [2024-11-24 00:07:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:52,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979923477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:52,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2024-11-24 00:07:52,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943183707] [2024-11-24 00:07:52,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:52,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:07:52,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:52,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:07:52,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:07:52,955 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:53,175 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2024-11-24 00:07:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:07:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-24 00:07:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:53,176 INFO L225 Difference]: With dead ends: 76 [2024-11-24 00:07:53,176 INFO L226 Difference]: Without dead ends: 52 [2024-11-24 00:07:53,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:07:53,177 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:53,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 339 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:07:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-24 00:07:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-24 00:07:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:53,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2024-11-24 00:07:53,179 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 36 [2024-11-24 00:07:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:53,179 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2024-11-24 00:07:53,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:53,179 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2024-11-24 00:07:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-24 00:07:53,180 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:53,180 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:53,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-24 00:07:53,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:53,384 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:53,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1540772110, now seen corresponding path program 2 times [2024-11-24 00:07:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647093113] [2024-11-24 00:07:53,385 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:07:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:53,406 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:07:53,406 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:53,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:53,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647093113] [2024-11-24 00:07:53,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647093113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:53,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539658062] [2024-11-24 00:07:53,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:07:53,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:53,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:53,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:53,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:07:53,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:07:53,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:53,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-24 00:07:53,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:54,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:07:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:07:54,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539658062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:54,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:54,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-24 00:07:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119584768] [2024-11-24 00:07:54,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:54,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:07:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:54,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:07:54,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:07:54,368 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 states have internal predecessors, (85), 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) [2024-11-24 00:07:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:54,660 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-24 00:07:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:07:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 states have internal predecessors, (85), 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) Word has length 40 [2024-11-24 00:07:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:54,661 INFO L225 Difference]: With dead ends: 58 [2024-11-24 00:07:54,661 INFO L226 Difference]: Without dead ends: 58 [2024-11-24 00:07:54,662 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:07:54,662 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:54,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 304 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:07:54,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-24 00:07:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-11-24 00:07:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-24 00:07:54,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2024-11-24 00:07:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:54,667 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-24 00:07:54,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.25) internal successors, (85), 21 states have internal predecessors, (85), 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) [2024-11-24 00:07:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-24 00:07:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-24 00:07:54,667 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:54,668 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:54,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 00:07:54,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:54,872 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:54,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1081719089, now seen corresponding path program 2 times [2024-11-24 00:07:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:54,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653826934] [2024-11-24 00:07:54,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:07:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:54,907 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:07:54,908 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:07:55,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:55,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653826934] [2024-11-24 00:07:55,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653826934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920761254] [2024-11-24 00:07:55,873 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:07:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:55,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:55,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:07:56,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:07:56,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:56,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-24 00:07:56,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:07:56,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:07:56,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:07:56,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:07:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:07:57,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:07:57,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:07:57,556 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 34 treesize of output 30 [2024-11-24 00:07:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:07:57,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920761254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:07:57,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:07:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 16] total 49 [2024-11-24 00:07:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802952932] [2024-11-24 00:07:57,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:07:57,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-24 00:07:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:07:57,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-24 00:07:57,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2024-11-24 00:07:57,903 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:07:58,986 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-24 00:07:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 00:07:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-24 00:07:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:07:58,987 INFO L225 Difference]: With dead ends: 81 [2024-11-24 00:07:58,988 INFO L226 Difference]: Without dead ends: 63 [2024-11-24 00:07:58,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=298, Invalid=3608, Unknown=0, NotChecked=0, Total=3906 [2024-11-24 00:07:58,989 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:07:58,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 458 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:07:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-24 00:07:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-24 00:07:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2024-11-24 00:07:58,991 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 42 [2024-11-24 00:07:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:07:58,992 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2024-11-24 00:07:58,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:07:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2024-11-24 00:07:58,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-24 00:07:58,992 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:07:58,993 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:07:59,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:07:59,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:59,195 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:07:59,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:07:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -373781496, now seen corresponding path program 3 times [2024-11-24 00:07:59,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:07:59,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19034354] [2024-11-24 00:07:59,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:07:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:07:59,232 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:07:59,232 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:07:59,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:07:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19034354] [2024-11-24 00:07:59,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19034354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:07:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803154635] [2024-11-24 00:07:59,645 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:07:59,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:07:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:07:59,647 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:07:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:07:59,869 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-24 00:07:59,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:07:59,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 00:07:59,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:08:00,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:00,291 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 7 treesize of output 5 [2024-11-24 00:08:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:08:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803154635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2024-11-24 00:08:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388675658] [2024-11-24 00:08:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:00,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:08:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:00,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:08:00,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:08:00,350 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:00,624 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-24 00:08:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:08:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-24 00:08:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:00,625 INFO L225 Difference]: With dead ends: 59 [2024-11-24 00:08:00,625 INFO L226 Difference]: Without dead ends: 59 [2024-11-24 00:08:00,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:08:00,626 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:00,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-24 00:08:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-24 00:08:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 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) [2024-11-24 00:08:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-11-24 00:08:00,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 46 [2024-11-24 00:08:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:00,629 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-11-24 00:08:00,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-11-24 00:08:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-24 00:08:00,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:00,630 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:00,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:08:00,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:00,834 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:00,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:00,835 INFO L85 PathProgramCache]: Analyzing trace with hash 51040330, now seen corresponding path program 2 times [2024-11-24 00:08:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:00,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254367410] [2024-11-24 00:08:00,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:00,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:00,851 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:08:00,851 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:08:00,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:00,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254367410] [2024-11-24 00:08:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254367410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:08:00,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:08:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:08:00,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335214471] [2024-11-24 00:08:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:08:00,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:08:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:00,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:08:00,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:08:00,927 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-11-24 00:08:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:00,975 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-11-24 00:08:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:08:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) Word has length 50 [2024-11-24 00:08:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:00,976 INFO L225 Difference]: With dead ends: 58 [2024-11-24 00:08:00,976 INFO L226 Difference]: Without dead ends: 55 [2024-11-24 00:08:00,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:08:00,976 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:00,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 85 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:08:00,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-24 00:08:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-24 00:08:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-24 00:08:00,980 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2024-11-24 00:08:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:00,980 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-24 00:08:00,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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) [2024-11-24 00:08:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-24 00:08:00,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-24 00:08:00,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:00,981 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:00,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-24 00:08:00,981 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:00,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:00,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1591797307, now seen corresponding path program 3 times [2024-11-24 00:08:00,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:00,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884800932] [2024-11-24 00:08:00,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:00,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:01,019 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:08:01,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:08:01,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884800932] [2024-11-24 00:08:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884800932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:01,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858275578] [2024-11-24 00:08:01,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:01,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:01,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:01,458 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:08:01,702 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-24 00:08:01,702 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:01,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-24 00:08:01,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:01,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:08:02,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:02,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:08:02,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:02,633 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 16 treesize of output 12 [2024-11-24 00:08:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:08:02,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858275578] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:02,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:02,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 16] total 44 [2024-11-24 00:08:02,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837806653] [2024-11-24 00:08:02,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:02,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-24 00:08:02,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:02,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-24 00:08:02,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1759, Unknown=0, NotChecked=0, Total=1892 [2024-11-24 00:08:02,813 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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) [2024-11-24 00:08:04,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:04,082 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2024-11-24 00:08:04,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-24 00:08:04,083 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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) Word has length 51 [2024-11-24 00:08:04,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:04,084 INFO L225 Difference]: With dead ends: 158 [2024-11-24 00:08:04,084 INFO L226 Difference]: Without dead ends: 69 [2024-11-24 00:08:04,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2024-11-24 00:08:04,085 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:04,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 512 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:08:04,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-24 00:08:04,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2024-11-24 00:08:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-11-24 00:08:04,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 51 [2024-11-24 00:08:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:04,088 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-11-24 00:08:04,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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) [2024-11-24 00:08:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-11-24 00:08:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-24 00:08:04,088 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:04,089 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:04,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 00:08:04,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-24 00:08:04,293 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:04,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1106502473, now seen corresponding path program 4 times [2024-11-24 00:08:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:04,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231949595] [2024-11-24 00:08:04,294 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:04,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:04,330 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:04,332 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:04,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231949595] [2024-11-24 00:08:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231949595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108670194] [2024-11-24 00:08:04,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:04,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:04,642 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 00:08:04,803 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:04,803 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:04,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-24 00:08:04,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:05,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:05,336 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 21 treesize of output 17 [2024-11-24 00:08:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:05,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108670194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:05,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:05,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-24 00:08:05,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557182441] [2024-11-24 00:08:05,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:05,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:08:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:05,548 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:08:05,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:08:05,549 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 27 states have internal predecessors, (128), 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) [2024-11-24 00:08:05,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:05,812 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-11-24 00:08:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:08:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 27 states have internal predecessors, (128), 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) Word has length 59 [2024-11-24 00:08:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:05,813 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:08:05,813 INFO L226 Difference]: Without dead ends: 72 [2024-11-24 00:08:05,814 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:08:05,814 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:05,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 312 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-24 00:08:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-11-24 00:08:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 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) [2024-11-24 00:08:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-11-24 00:08:05,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 59 [2024-11-24 00:08:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:05,816 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-11-24 00:08:05,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.923076923076923) internal successors, (128), 27 states have internal predecessors, (128), 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) [2024-11-24 00:08:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-11-24 00:08:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-24 00:08:05,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:05,818 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:05,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 00:08:06,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 00:08:06,022 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:06,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1803012534, now seen corresponding path program 4 times [2024-11-24 00:08:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187197412] [2024-11-24 00:08:06,023 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:06,045 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:06,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:06,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:06,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187197412] [2024-11-24 00:08:06,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187197412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:06,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785608148] [2024-11-24 00:08:06,415 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:06,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:06,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:06,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:06,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:08:06,569 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:06,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:06,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:08:06,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:06,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 00:08:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:06,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:07,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785608148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:07,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:07,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2024-11-24 00:08:07,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004479291] [2024-11-24 00:08:07,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:07,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 00:08:07,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:07,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 00:08:07,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2024-11-24 00:08:07,465 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 32 states, 31 states have (on average 4.258064516129032) internal successors, (132), 32 states have internal predecessors, (132), 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) [2024-11-24 00:08:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:07,830 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2024-11-24 00:08:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:08:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.258064516129032) internal successors, (132), 32 states have internal predecessors, (132), 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) Word has length 61 [2024-11-24 00:08:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:07,831 INFO L225 Difference]: With dead ends: 70 [2024-11-24 00:08:07,831 INFO L226 Difference]: Without dead ends: 70 [2024-11-24 00:08:07,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-11-24 00:08:07,832 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:07,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 385 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:08:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-24 00:08:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-24 00:08:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-24 00:08:07,835 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2024-11-24 00:08:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:07,836 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-24 00:08:07,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.258064516129032) internal successors, (132), 32 states have internal predecessors, (132), 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) [2024-11-24 00:08:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-24 00:08:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-24 00:08:07,836 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:07,836 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:07,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 00:08:08,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-24 00:08:08,037 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:08,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:08,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1511303879, now seen corresponding path program 5 times [2024-11-24 00:08:08,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:08,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275804995] [2024-11-24 00:08:08,038 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:08,087 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-24 00:08:08,087 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:08,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:08,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275804995] [2024-11-24 00:08:08,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275804995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:08,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150530872] [2024-11-24 00:08:08,770 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:08,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:08,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:08,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 00:08:08,924 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-24 00:08:08,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:08,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-24 00:08:08,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:09,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:08:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:09,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:09,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:09,942 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 16 treesize of output 12 [2024-11-24 00:08:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:08:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150530872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:10,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:10,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 46 [2024-11-24 00:08:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216442892] [2024-11-24 00:08:10,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:10,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-24 00:08:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:10,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-24 00:08:10,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1917, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:08:10,162 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 46 states, 46 states have (on average 3.5434782608695654) internal successors, (163), 46 states have internal predecessors, (163), 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) [2024-11-24 00:08:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:11,089 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2024-11-24 00:08:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 00:08:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.5434782608695654) internal successors, (163), 46 states have internal predecessors, (163), 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) Word has length 66 [2024-11-24 00:08:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:11,090 INFO L225 Difference]: With dead ends: 132 [2024-11-24 00:08:11,090 INFO L226 Difference]: Without dead ends: 86 [2024-11-24 00:08:11,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=3294, Unknown=0, NotChecked=0, Total=3540 [2024-11-24 00:08:11,091 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:11,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 635 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:08:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-24 00:08:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2024-11-24 00:08:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 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) [2024-11-24 00:08:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-11-24 00:08:11,095 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2024-11-24 00:08:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:11,095 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-11-24 00:08:11,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.5434782608695654) internal successors, (163), 46 states have internal predecessors, (163), 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) [2024-11-24 00:08:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-11-24 00:08:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-24 00:08:11,095 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:11,096 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:11,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:11,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-24 00:08:11,296 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:11,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:11,297 INFO L85 PathProgramCache]: Analyzing trace with hash 284193139, now seen corresponding path program 5 times [2024-11-24 00:08:11,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:11,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283028916] [2024-11-24 00:08:11,297 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:11,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:11,345 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-24 00:08:11,345 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:12,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:12,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283028916] [2024-11-24 00:08:12,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283028916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:12,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395000832] [2024-11-24 00:08:12,221 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:12,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:12,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:12,223 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:12,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:08:12,386 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-24 00:08:12,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:12,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-24 00:08:12,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:12,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:08:12,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:12,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:14,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:14,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:08:14,779 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 34 treesize of output 30 [2024-11-24 00:08:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:15,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395000832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:15,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:15,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 22] total 66 [2024-11-24 00:08:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134228473] [2024-11-24 00:08:15,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:15,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-24 00:08:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:15,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-24 00:08:15,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4067, Unknown=0, NotChecked=0, Total=4290 [2024-11-24 00:08:15,325 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 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) [2024-11-24 00:08:17,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:17,632 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2024-11-24 00:08:17,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-24 00:08:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 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) Word has length 72 [2024-11-24 00:08:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:17,634 INFO L225 Difference]: With dead ends: 121 [2024-11-24 00:08:17,634 INFO L226 Difference]: Without dead ends: 89 [2024-11-24 00:08:17,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=420, Invalid=8136, Unknown=0, NotChecked=0, Total=8556 [2024-11-24 00:08:17,636 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:17,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 838 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-24 00:08:17,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-24 00:08:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2024-11-24 00:08:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 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) [2024-11-24 00:08:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-24 00:08:17,639 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2024-11-24 00:08:17,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:17,639 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-24 00:08:17,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 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) [2024-11-24 00:08:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-24 00:08:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-24 00:08:17,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:17,640 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:17,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:17,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-24 00:08:17,841 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:17,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1733774572, now seen corresponding path program 6 times [2024-11-24 00:08:17,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:17,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296324773] [2024-11-24 00:08:17,841 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:17,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:17,881 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-24 00:08:17,881 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:18,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296324773] [2024-11-24 00:08:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296324773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068540159] [2024-11-24 00:08:18,436 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:18,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:18,441 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:18,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 00:08:18,659 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-24 00:08:18,660 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:18,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-24 00:08:18,666 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:18,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:19,242 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 7 treesize of output 5 [2024-11-24 00:08:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 67 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:19,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068540159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:19,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:19,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2024-11-24 00:08:19,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108714069] [2024-11-24 00:08:19,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:19,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 00:08:19,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:19,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 00:08:19,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 00:08:19,323 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 33 states, 32 states have (on average 4.125) internal successors, (132), 33 states have internal predecessors, (132), 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) [2024-11-24 00:08:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:19,693 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-24 00:08:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 00:08:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.125) internal successors, (132), 33 states have internal predecessors, (132), 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) Word has length 76 [2024-11-24 00:08:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:19,694 INFO L225 Difference]: With dead ends: 85 [2024-11-24 00:08:19,694 INFO L226 Difference]: Without dead ends: 85 [2024-11-24 00:08:19,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2024-11-24 00:08:19,695 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:19,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 274 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:08:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-24 00:08:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-24 00:08:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 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) [2024-11-24 00:08:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-24 00:08:19,698 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 76 [2024-11-24 00:08:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:19,698 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-24 00:08:19,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.125) internal successors, (132), 33 states have internal predecessors, (132), 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) [2024-11-24 00:08:19,699 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-24 00:08:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-24 00:08:19,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:19,699 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:19,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-24 00:08:19,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:19,904 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:19,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:19,904 INFO L85 PathProgramCache]: Analyzing trace with hash -611642409, now seen corresponding path program 6 times [2024-11-24 00:08:19,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:19,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907376726] [2024-11-24 00:08:19,904 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:19,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:19,960 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-24 00:08:19,960 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 6 proven. 97 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:20,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907376726] [2024-11-24 00:08:20,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907376726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:20,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852610928] [2024-11-24 00:08:20,873 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:20,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:20,875 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:20,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 00:08:21,256 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-24 00:08:21,256 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:21,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-24 00:08:21,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:21,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:08:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:08:22,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:22,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:08:22,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:22,748 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 16 treesize of output 12 [2024-11-24 00:08:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 9 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:23,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852610928] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:23,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:23,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 20] total 60 [2024-11-24 00:08:23,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834717222] [2024-11-24 00:08:23,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:23,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-24 00:08:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:23,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-24 00:08:23,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3359, Unknown=0, NotChecked=0, Total=3540 [2024-11-24 00:08:23,043 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 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) [2024-11-24 00:08:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:25,801 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2024-11-24 00:08:25,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-24 00:08:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 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) Word has length 81 [2024-11-24 00:08:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:25,802 INFO L225 Difference]: With dead ends: 140 [2024-11-24 00:08:25,802 INFO L226 Difference]: Without dead ends: 101 [2024-11-24 00:08:25,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=583, Invalid=9517, Unknown=0, NotChecked=0, Total=10100 [2024-11-24 00:08:25,805 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:25,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 914 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-24 00:08:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-24 00:08:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2024-11-24 00:08:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 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) [2024-11-24 00:08:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2024-11-24 00:08:25,808 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 81 [2024-11-24 00:08:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:25,808 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2024-11-24 00:08:25,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.466666666666667) internal successors, (208), 60 states have internal predecessors, (208), 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) [2024-11-24 00:08:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2024-11-24 00:08:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-24 00:08:25,809 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:25,809 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:25,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-24 00:08:26,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:26,010 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:26,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:26,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1906382273, now seen corresponding path program 7 times [2024-11-24 00:08:26,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:26,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92173015] [2024-11-24 00:08:26,010 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:26,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92173015] [2024-11-24 00:08:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92173015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506475766] [2024-11-24 00:08:26,652 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:26,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:26,656 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:26,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 00:08:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:26,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-24 00:08:26,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:27,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:27,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:08:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506475766] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:27,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2024-11-24 00:08:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933191236] [2024-11-24 00:08:27,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:27,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 00:08:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:27,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 00:08:27,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 00:08:27,681 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 36 states have internal predecessors, (152), 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) [2024-11-24 00:08:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:28,128 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2024-11-24 00:08:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 00:08:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 36 states have internal predecessors, (152), 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) Word has length 87 [2024-11-24 00:08:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:28,129 INFO L225 Difference]: With dead ends: 96 [2024-11-24 00:08:28,129 INFO L226 Difference]: Without dead ends: 96 [2024-11-24 00:08:28,129 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2024-11-24 00:08:28,129 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:28,130 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 485 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:08:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-24 00:08:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-24 00:08:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 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) [2024-11-24 00:08:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-24 00:08:28,131 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 87 [2024-11-24 00:08:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:28,132 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-24 00:08:28,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 36 states have internal predecessors, (152), 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) [2024-11-24 00:08:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-24 00:08:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-24 00:08:28,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:28,132 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:28,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:28,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:28,335 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:28,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2002768484, now seen corresponding path program 7 times [2024-11-24 00:08:28,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:28,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712193487] [2024-11-24 00:08:28,335 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:28,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-24 00:08:29,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:29,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712193487] [2024-11-24 00:08:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712193487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:29,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76863354] [2024-11-24 00:08:29,434 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:08:29,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:29,436 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:29,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 00:08:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:29,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-24 00:08:29,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:29,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:30,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:30,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:08:30,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:30,608 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 16 treesize of output 12 [2024-11-24 00:08:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76863354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:30,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:30,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 43 [2024-11-24 00:08:30,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060687787] [2024-11-24 00:08:30,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:30,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-24 00:08:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:30,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-24 00:08:30,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1708, Unknown=0, NotChecked=0, Total=1806 [2024-11-24 00:08:30,729 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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) [2024-11-24 00:08:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:33,495 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2024-11-24 00:08:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-24 00:08:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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) Word has length 92 [2024-11-24 00:08:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:33,496 INFO L225 Difference]: With dead ends: 283 [2024-11-24 00:08:33,496 INFO L226 Difference]: Without dead ends: 191 [2024-11-24 00:08:33,497 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=322, Invalid=6320, Unknown=0, NotChecked=0, Total=6642 [2024-11-24 00:08:33,497 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:33,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 876 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-24 00:08:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-24 00:08:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2024-11-24 00:08:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 176 states have (on average 1.0340909090909092) internal successors, (182), 177 states have internal predecessors, (182), 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) [2024-11-24 00:08:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2024-11-24 00:08:33,502 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 92 [2024-11-24 00:08:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:33,502 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2024-11-24 00:08:33,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.744186046511628) internal successors, (161), 43 states have internal predecessors, (161), 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) [2024-11-24 00:08:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2024-11-24 00:08:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-24 00:08:33,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:33,504 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:33,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 00:08:33,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-24 00:08:33,704 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:33,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2077829794, now seen corresponding path program 8 times [2024-11-24 00:08:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:33,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129181606] [2024-11-24 00:08:33,705 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:33,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:33,739 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:33,739 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 28 proven. 161 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129181606] [2024-11-24 00:08:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129181606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976550443] [2024-11-24 00:08:34,566 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:34,568 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:34,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 00:08:34,748 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:34,748 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:34,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-24 00:08:34,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:35,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:35,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:08:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-24 00:08:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976550443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:35,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:35,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 40 [2024-11-24 00:08:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167436784] [2024-11-24 00:08:35,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:35,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-24 00:08:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:35,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-24 00:08:35,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2024-11-24 00:08:35,782 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 41 states, 40 states have (on average 4.4) internal successors, (176), 41 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:36,432 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2024-11-24 00:08:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 00:08:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.4) internal successors, (176), 41 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-24 00:08:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:36,434 INFO L225 Difference]: With dead ends: 186 [2024-11-24 00:08:36,434 INFO L226 Difference]: Without dead ends: 186 [2024-11-24 00:08:36,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:08:36,435 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:36,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 620 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 00:08:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-24 00:08:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2024-11-24 00:08:36,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0382513661202186) internal successors, (190), 184 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:36,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 190 transitions. [2024-11-24 00:08:36,444 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 190 transitions. Word has length 98 [2024-11-24 00:08:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:36,445 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 190 transitions. [2024-11-24 00:08:36,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.4) internal successors, (176), 41 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:36,445 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 190 transitions. [2024-11-24 00:08:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-24 00:08:36,446 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:36,446 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:36,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 00:08:36,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-24 00:08:36,647 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:36,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:36,647 INFO L85 PathProgramCache]: Analyzing trace with hash 278732054, now seen corresponding path program 8 times [2024-11-24 00:08:36,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:36,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549941325] [2024-11-24 00:08:36,648 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:36,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:36,705 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:36,705 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 145 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:37,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:37,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549941325] [2024-11-24 00:08:37,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549941325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451341334] [2024-11-24 00:08:37,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:08:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:37,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:37,400 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:37,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 00:08:37,587 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:08:37,587 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:37,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-24 00:08:37,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:38,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:08:38,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:08:38,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:08:39,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:08:39,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-11-24 00:08:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:39,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:40,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-24 00:08:40,534 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 62 treesize of output 54 [2024-11-24 00:08:40,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-24 00:08:40,612 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 77 treesize of output 69 [2024-11-24 00:08:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 166 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-24 00:08:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451341334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:41,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:41,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36, 30] total 78 [2024-11-24 00:08:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813664521] [2024-11-24 00:08:41,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:41,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-11-24 00:08:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:41,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-11-24 00:08:41,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=5672, Unknown=0, NotChecked=0, Total=6006 [2024-11-24 00:08:41,066 INFO L87 Difference]: Start difference. First operand 185 states and 190 transitions. Second operand has 78 states, 78 states have (on average 3.1923076923076925) internal successors, (249), 78 states have internal predecessors, (249), 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) [2024-11-24 00:08:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:42,829 INFO L93 Difference]: Finished difference Result 267 states and 273 transitions. [2024-11-24 00:08:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 00:08:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1923076923076925) internal successors, (249), 78 states have internal predecessors, (249), 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) Word has length 100 [2024-11-24 00:08:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:42,831 INFO L225 Difference]: With dead ends: 267 [2024-11-24 00:08:42,831 INFO L226 Difference]: Without dead ends: 192 [2024-11-24 00:08:42,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=358, Invalid=6284, Unknown=0, NotChecked=0, Total=6642 [2024-11-24 00:08:42,832 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 23 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 3270 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:42,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1693 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3270 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 00:08:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-24 00:08:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2024-11-24 00:08:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.0374331550802138) internal successors, (194), 188 states have internal predecessors, (194), 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) [2024-11-24 00:08:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2024-11-24 00:08:42,836 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 100 [2024-11-24 00:08:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:42,836 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2024-11-24 00:08:42,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1923076923076925) internal successors, (249), 78 states have internal predecessors, (249), 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) [2024-11-24 00:08:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2024-11-24 00:08:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-24 00:08:42,837 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:42,837 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:42,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 00:08:43,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-24 00:08:43,038 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:43,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1035535013, now seen corresponding path program 9 times [2024-11-24 00:08:43,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:43,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586994490] [2024-11-24 00:08:43,039 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:43,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:43,108 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-24 00:08:43,108 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586994490] [2024-11-24 00:08:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586994490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054270105] [2024-11-24 00:08:44,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:08:44,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:44,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:44,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 00:08:44,674 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-24 00:08:44,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:44,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-24 00:08:44,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:45,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:08:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 77 proven. 154 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-24 00:08:45,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:45,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:45,986 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 16 treesize of output 12 [2024-11-24 00:08:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 77 proven. 94 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-24 00:08:46,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054270105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:46,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:46,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 17] total 53 [2024-11-24 00:08:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374619169] [2024-11-24 00:08:46,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:46,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-24 00:08:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:46,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-24 00:08:46,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2612, Unknown=0, NotChecked=0, Total=2756 [2024-11-24 00:08:46,338 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:48,453 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-11-24 00:08:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 00:08:48,454 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2024-11-24 00:08:48,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:48,454 INFO L225 Difference]: With dead ends: 180 [2024-11-24 00:08:48,454 INFO L226 Difference]: Without dead ends: 115 [2024-11-24 00:08:48,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=316, Invalid=5384, Unknown=0, NotChecked=0, Total=5700 [2024-11-24 00:08:48,455 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:48,455 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1142 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 00:08:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-24 00:08:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-24 00:08:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2024-11-24 00:08:48,457 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 103 [2024-11-24 00:08:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:48,458 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2024-11-24 00:08:48,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.377358490566038) internal successors, (232), 53 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:08:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2024-11-24 00:08:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-24 00:08:48,458 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:48,458 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:48,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-24 00:08:48,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:48,659 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:48,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash 249003599, now seen corresponding path program 10 times [2024-11-24 00:08:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:48,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427272805] [2024-11-24 00:08:48,660 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:48,690 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:48,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:49,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427272805] [2024-11-24 00:08:49,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427272805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:49,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461434259] [2024-11-24 00:08:49,298 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:08:49,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:49,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:49,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 00:08:49,613 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:08:49,613 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:49,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-24 00:08:49,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:50,104 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:50,449 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 21 treesize of output 17 [2024-11-24 00:08:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461434259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:50,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:50,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2024-11-24 00:08:50,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862218425] [2024-11-24 00:08:50,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:50,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-24 00:08:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:50,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-24 00:08:50,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2024-11-24 00:08:50,787 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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) [2024-11-24 00:08:51,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:51,256 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2024-11-24 00:08:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 00:08:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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) Word has length 104 [2024-11-24 00:08:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:51,258 INFO L225 Difference]: With dead ends: 116 [2024-11-24 00:08:51,258 INFO L226 Difference]: Without dead ends: 116 [2024-11-24 00:08:51,258 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2024-11-24 00:08:51,259 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:51,259 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 631 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:08:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-24 00:08:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2024-11-24 00:08:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 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) [2024-11-24 00:08:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2024-11-24 00:08:51,262 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 104 [2024-11-24 00:08:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:51,262 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2024-11-24 00:08:51,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 5.024390243902439) internal successors, (206), 42 states have internal predecessors, (206), 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) [2024-11-24 00:08:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2024-11-24 00:08:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-24 00:08:51,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:51,263 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:51,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-24 00:08:51,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-24 00:08:51,468 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:51,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -384145549, now seen corresponding path program 11 times [2024-11-24 00:08:51,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:51,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432235866] [2024-11-24 00:08:51,468 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:51,599 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-24 00:08:51,599 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:52,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432235866] [2024-11-24 00:08:52,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432235866] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:52,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243832183] [2024-11-24 00:08:52,633 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:08:52,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:52,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:52,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:52,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 00:08:52,975 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-24 00:08:52,975 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:52,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-24 00:08:52,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:53,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:08:53,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-24 00:08:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:08:53,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:53,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-24 00:08:53,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:53,926 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 16 treesize of output 12 [2024-11-24 00:08:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243832183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:54,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 22] total 50 [2024-11-24 00:08:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846116635] [2024-11-24 00:08:54,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:54,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-24 00:08:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:54,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-24 00:08:54,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2024-11-24 00:08:54,245 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 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) [2024-11-24 00:08:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:55,144 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2024-11-24 00:08:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 00:08:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 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) Word has length 111 [2024-11-24 00:08:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:55,145 INFO L225 Difference]: With dead ends: 204 [2024-11-24 00:08:55,145 INFO L226 Difference]: Without dead ends: 122 [2024-11-24 00:08:55,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=2890, Unknown=0, NotChecked=0, Total=3080 [2024-11-24 00:08:55,146 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:55,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1314 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:08:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-24 00:08:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2024-11-24 00:08:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 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) [2024-11-24 00:08:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2024-11-24 00:08:55,149 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 111 [2024-11-24 00:08:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:55,149 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2024-11-24 00:08:55,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.24) internal successors, (212), 50 states have internal predecessors, (212), 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) [2024-11-24 00:08:55,149 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2024-11-24 00:08:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-24 00:08:55,150 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:55,150 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:08:55,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 00:08:55,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-24 00:08:55,351 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:08:55,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1462290278, now seen corresponding path program 12 times [2024-11-24 00:08:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:08:55,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067783870] [2024-11-24 00:08:55,352 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:55,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:08:55,417 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-24 00:08:55,417 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 00:08:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:08:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067783870] [2024-11-24 00:08:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067783870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663712467] [2024-11-24 00:08:56,329 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:08:56,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:56,331 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:56,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 00:08:57,035 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-24 00:08:57,036 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:08:57,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-24 00:08:57,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:57,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:08:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:08:57,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:57,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:08:57,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:08:57,900 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 16 treesize of output 12 [2024-11-24 00:08:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:08:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663712467] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:08:58,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:08:58,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 47 [2024-11-24 00:08:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012380546] [2024-11-24 00:08:58,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:08:58,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-24 00:08:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:08:58,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-24 00:08:58,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2023, Unknown=0, NotChecked=0, Total=2162 [2024-11-24 00:08:58,068 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 47 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 47 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:00,715 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2024-11-24 00:09:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-24 00:09:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 47 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2024-11-24 00:09:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:00,716 INFO L225 Difference]: With dead ends: 188 [2024-11-24 00:09:00,716 INFO L226 Difference]: Without dead ends: 135 [2024-11-24 00:09:00,717 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2326 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=679, Invalid=9623, Unknown=0, NotChecked=0, Total=10302 [2024-11-24 00:09:00,718 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:00,718 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 902 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-24 00:09:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-24 00:09:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2024-11-24 00:09:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 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) [2024-11-24 00:09:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2024-11-24 00:09:00,721 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 115 [2024-11-24 00:09:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:00,721 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2024-11-24 00:09:00,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.0638297872340425) internal successors, (191), 47 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2024-11-24 00:09:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-24 00:09:00,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:00,723 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:00,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-24 00:09:00,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-24 00:09:00,924 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:00,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1176481662, now seen corresponding path program 9 times [2024-11-24 00:09:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108654647] [2024-11-24 00:09:00,925 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:09:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:01,013 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-24 00:09:01,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 45 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108654647] [2024-11-24 00:09:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108654647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542218240] [2024-11-24 00:09:02,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:09:02,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:02,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:02,119 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:02,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 00:09:02,679 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-24 00:09:02,679 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:02,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-24 00:09:02,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:03,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:03,615 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 7 treesize of output 5 [2024-11-24 00:09:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542218240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:03,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:03,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 45 [2024-11-24 00:09:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049960132] [2024-11-24 00:09:03,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:03,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-24 00:09:03,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:03,800 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-24 00:09:03,800 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1816, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:09:03,800 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 46 states, 45 states have (on average 4.444444444444445) internal successors, (200), 46 states have internal predecessors, (200), 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) [2024-11-24 00:09:04,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:04,746 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2024-11-24 00:09:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-24 00:09:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.444444444444445) internal successors, (200), 46 states have internal predecessors, (200), 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) Word has length 121 [2024-11-24 00:09:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:04,747 INFO L225 Difference]: With dead ends: 130 [2024-11-24 00:09:04,748 INFO L226 Difference]: Without dead ends: 130 [2024-11-24 00:09:04,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 211 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=589, Invalid=3833, Unknown=0, NotChecked=0, Total=4422 [2024-11-24 00:09:04,748 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:04,749 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 491 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:09:04,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-24 00:09:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-24 00:09:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 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) [2024-11-24 00:09:04,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2024-11-24 00:09:04,752 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 121 [2024-11-24 00:09:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:04,752 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2024-11-24 00:09:04,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.444444444444445) internal successors, (200), 46 states have internal predecessors, (200), 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) [2024-11-24 00:09:04,752 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2024-11-24 00:09:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-24 00:09:04,753 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:04,753 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:04,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-24 00:09:04,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-24 00:09:04,954 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:04,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:04,954 INFO L85 PathProgramCache]: Analyzing trace with hash -719135231, now seen corresponding path program 13 times [2024-11-24 00:09:04,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:04,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849556023] [2024-11-24 00:09:04,954 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:09:04,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849556023] [2024-11-24 00:09:05,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849556023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017876604] [2024-11-24 00:09:05,937 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:09:05,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:05,939 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:05,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 00:09:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:06,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-24 00:09:06,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:06,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:09:06,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-24 00:09:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:06,660 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:06,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-24 00:09:06,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:09:06,786 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 16 treesize of output 12 [2024-11-24 00:09:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 15 proven. 280 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017876604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:06,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:06,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2024-11-24 00:09:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341710228] [2024-11-24 00:09:06,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:06,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-24 00:09:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:06,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-24 00:09:06,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2024-11-24 00:09:06,924 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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) [2024-11-24 00:09:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:07,729 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2024-11-24 00:09:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 00:09:07,729 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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) Word has length 126 [2024-11-24 00:09:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:07,730 INFO L225 Difference]: With dead ends: 227 [2024-11-24 00:09:07,730 INFO L226 Difference]: Without dead ends: 137 [2024-11-24 00:09:07,730 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=2106, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:09:07,731 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:07,731 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1417 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:09:07,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-24 00:09:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2024-11-24 00:09:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 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) [2024-11-24 00:09:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2024-11-24 00:09:07,734 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 126 [2024-11-24 00:09:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:07,734 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2024-11-24 00:09:07,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.975) internal successors, (159), 40 states have internal predecessors, (159), 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) [2024-11-24 00:09:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2024-11-24 00:09:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-24 00:09:07,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:07,735 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:07,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 00:09:07,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-24 00:09:07,940 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:07,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1723680262, now seen corresponding path program 14 times [2024-11-24 00:09:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:07,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839887820] [2024-11-24 00:09:07,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:09:07,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:07,986 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:09:07,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839887820] [2024-11-24 00:09:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839887820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680751137] [2024-11-24 00:09:09,100 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:09:09,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:09,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:09,103 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:09,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 00:09:09,351 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:09:09,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:09,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-24 00:09:09,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:09,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:10,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:09:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-24 00:09:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680751137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:10,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:10,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2024-11-24 00:09:10,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103399490] [2024-11-24 00:09:10,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:10,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-24 00:09:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:10,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-24 00:09:10,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2024-11-24 00:09:10,638 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 45 states, 44 states have (on average 4.931818181818182) internal successors, (217), 45 states have internal predecessors, (217), 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) [2024-11-24 00:09:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:11,258 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2024-11-24 00:09:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 00:09:11,259 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.931818181818182) internal successors, (217), 45 states have internal predecessors, (217), 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) Word has length 130 [2024-11-24 00:09:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:11,259 INFO L225 Difference]: With dead ends: 143 [2024-11-24 00:09:11,259 INFO L226 Difference]: Without dead ends: 143 [2024-11-24 00:09:11,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 227 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2024-11-24 00:09:11,260 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:11,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 745 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:09:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-24 00:09:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-11-24 00:09:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 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) [2024-11-24 00:09:11,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2024-11-24 00:09:11,263 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 130 [2024-11-24 00:09:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:11,263 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2024-11-24 00:09:11,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.931818181818182) internal successors, (217), 45 states have internal predecessors, (217), 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) [2024-11-24 00:09:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2024-11-24 00:09:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-24 00:09:11,264 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:11,264 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:11,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-24 00:09:11,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-24 00:09:11,465 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:11,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1400644795, now seen corresponding path program 10 times [2024-11-24 00:09:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553006967] [2024-11-24 00:09:11,466 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:09:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:11,537 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:09:11,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:09:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553006967] [2024-11-24 00:09:13,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553006967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:13,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84815416] [2024-11-24 00:09:13,542 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:09:13,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:13,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:13,544 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:13,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 00:09:14,047 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:09:14,047 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:14,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-24 00:09:14,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:14,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:09:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 280 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:15,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:16,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:09:16,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:09:16,346 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 16 treesize of output 12 [2024-11-24 00:09:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 280 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84815416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:16,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 26] total 83 [2024-11-24 00:09:16,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287512693] [2024-11-24 00:09:16,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:16,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-24 00:09:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:16,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-24 00:09:16,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6562, Unknown=0, NotChecked=0, Total=6806 [2024-11-24 00:09:16,942 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 83 states, 83 states have (on average 3.3132530120481927) internal successors, (275), 83 states have internal predecessors, (275), 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) [2024-11-24 00:09:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:20,123 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2024-11-24 00:09:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-24 00:09:20,124 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.3132530120481927) internal successors, (275), 83 states have internal predecessors, (275), 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) Word has length 132 [2024-11-24 00:09:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:20,124 INFO L225 Difference]: With dead ends: 209 [2024-11-24 00:09:20,124 INFO L226 Difference]: Without dead ends: 149 [2024-11-24 00:09:20,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2438 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=493, Invalid=11939, Unknown=0, NotChecked=0, Total=12432 [2024-11-24 00:09:20,125 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 88 mSDsluCounter, 1989 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:20,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 2037 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4052 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-24 00:09:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-24 00:09:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2024-11-24 00:09:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 142 states have internal predecessors, (145), 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) [2024-11-24 00:09:20,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2024-11-24 00:09:20,130 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 132 [2024-11-24 00:09:20,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:20,130 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2024-11-24 00:09:20,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.3132530120481927) internal successors, (275), 83 states have internal predecessors, (275), 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) [2024-11-24 00:09:20,130 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2024-11-24 00:09:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-24 00:09:20,131 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:20,131 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:20,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-24 00:09:20,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-24 00:09:20,332 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:20,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2120819532, now seen corresponding path program 11 times [2024-11-24 00:09:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:20,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437381249] [2024-11-24 00:09:20,332 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:20,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:20,408 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-24 00:09:20,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 249 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:21,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:21,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437381249] [2024-11-24 00:09:21,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437381249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:21,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606698269] [2024-11-24 00:09:21,412 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:21,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:21,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:21,414 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:21,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 00:09:22,045 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-24 00:09:22,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:22,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-24 00:09:22,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:22,060 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 [2024-11-24 00:09:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 249 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:22,696 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 91 proven. 249 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606698269] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:24,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:24,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2024-11-24 00:09:24,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442462512] [2024-11-24 00:09:24,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:24,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-24 00:09:24,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:24,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-24 00:09:24,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2024-11-24 00:09:24,163 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 57 states, 56 states have (on average 4.678571428571429) internal successors, (262), 57 states have internal predecessors, (262), 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) [2024-11-24 00:09:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:25,152 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2024-11-24 00:09:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 00:09:25,153 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.678571428571429) internal successors, (262), 57 states have internal predecessors, (262), 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) Word has length 136 [2024-11-24 00:09:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:25,153 INFO L225 Difference]: With dead ends: 145 [2024-11-24 00:09:25,153 INFO L226 Difference]: Without dead ends: 145 [2024-11-24 00:09:25,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=468, Invalid=3822, Unknown=0, NotChecked=0, Total=4290 [2024-11-24 00:09:25,154 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:25,154 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1007 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:09:25,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-24 00:09:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2024-11-24 00:09:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.027972027972028) internal successors, (147), 144 states have internal predecessors, (147), 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) [2024-11-24 00:09:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2024-11-24 00:09:25,157 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 136 [2024-11-24 00:09:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:25,157 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2024-11-24 00:09:25,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.678571428571429) internal successors, (262), 57 states have internal predecessors, (262), 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) [2024-11-24 00:09:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2024-11-24 00:09:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-24 00:09:25,158 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:25,158 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:25,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-24 00:09:25,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-24 00:09:25,359 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:25,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1426710257, now seen corresponding path program 15 times [2024-11-24 00:09:25,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:25,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831587679] [2024-11-24 00:09:25,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:09:25,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:25,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-24 00:09:25,514 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 364 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831587679] [2024-11-24 00:09:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831587679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642463838] [2024-11-24 00:09:27,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:09:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:27,460 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:27,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-24 00:09:28,385 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-24 00:09:28,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:28,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-11-24 00:09:28,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:29,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:09:29,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-24 00:09:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 364 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:29,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:29,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-24 00:09:30,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:09:30,476 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 16 treesize of output 12 [2024-11-24 00:09:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 17 proven. 364 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642463838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:31,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26, 26] total 82 [2024-11-24 00:09:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990298648] [2024-11-24 00:09:31,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:31,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-24 00:09:31,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:31,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-24 00:09:31,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=6393, Unknown=0, NotChecked=0, Total=6642 [2024-11-24 00:09:31,168 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 82 states, 82 states have (on average 3.951219512195122) internal successors, (324), 82 states have internal predecessors, (324), 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) [2024-11-24 00:09:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:34,104 INFO L93 Difference]: Finished difference Result 253 states and 256 transitions. [2024-11-24 00:09:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 00:09:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.951219512195122) internal successors, (324), 82 states have internal predecessors, (324), 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) Word has length 141 [2024-11-24 00:09:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:34,105 INFO L225 Difference]: With dead ends: 253 [2024-11-24 00:09:34,105 INFO L226 Difference]: Without dead ends: 152 [2024-11-24 00:09:34,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=411, Invalid=11579, Unknown=0, NotChecked=0, Total=11990 [2024-11-24 00:09:34,106 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 1951 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:34,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1996 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-24 00:09:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-24 00:09:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2024-11-24 00:09:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-24 00:09:34,109 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 141 [2024-11-24 00:09:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:34,109 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-24 00:09:34,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.951219512195122) internal successors, (324), 82 states have internal predecessors, (324), 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) [2024-11-24 00:09:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-24 00:09:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-24 00:09:34,110 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:34,110 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:34,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-24 00:09:34,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-24 00:09:34,311 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:34,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1957016566, now seen corresponding path program 16 times [2024-11-24 00:09:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:34,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875838847] [2024-11-24 00:09:34,311 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:09:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:34,351 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:09:34,351 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875838847] [2024-11-24 00:09:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875838847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837839254] [2024-11-24 00:09:35,074 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:09:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:35,076 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:35,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-24 00:09:35,928 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:09:35,928 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:35,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-24 00:09:35,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:36,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:37,170 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 21 treesize of output 17 [2024-11-24 00:09:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-24 00:09:37,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837839254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:37,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:37,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2024-11-24 00:09:37,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121238633] [2024-11-24 00:09:37,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:37,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-24 00:09:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:37,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-24 00:09:37,768 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2775, Unknown=0, NotChecked=0, Total=3192 [2024-11-24 00:09:37,768 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 57 states, 56 states have (on average 5.071428571428571) internal successors, (284), 57 states have internal predecessors, (284), 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) [2024-11-24 00:09:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:38,577 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2024-11-24 00:09:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-24 00:09:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.071428571428571) internal successors, (284), 57 states have internal predecessors, (284), 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) Word has length 145 [2024-11-24 00:09:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:38,579 INFO L225 Difference]: With dead ends: 158 [2024-11-24 00:09:38,579 INFO L226 Difference]: Without dead ends: 158 [2024-11-24 00:09:38,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=462, Invalid=2960, Unknown=0, NotChecked=0, Total=3422 [2024-11-24 00:09:38,579 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:38,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 992 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:09:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-24 00:09:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-24 00:09:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 153 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:09:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2024-11-24 00:09:38,582 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 145 [2024-11-24 00:09:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:38,583 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2024-11-24 00:09:38,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.071428571428571) internal successors, (284), 57 states have internal predecessors, (284), 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) [2024-11-24 00:09:38,583 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2024-11-24 00:09:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-24 00:09:38,584 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:38,584 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:38,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-24 00:09:38,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:38,784 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:38,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:38,785 INFO L85 PathProgramCache]: Analyzing trace with hash -502755401, now seen corresponding path program 12 times [2024-11-24 00:09:38,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:38,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508190000] [2024-11-24 00:09:38,785 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:09:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:38,919 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-24 00:09:38,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 35 proven. 364 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:40,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508190000] [2024-11-24 00:09:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508190000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645994577] [2024-11-24 00:09:40,099 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:09:40,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:40,101 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:40,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-24 00:09:41,485 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-24 00:09:41,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:41,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 213 conjuncts are in the unsatisfiable core [2024-11-24 00:09:41,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:41,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:09:42,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:09:42,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:09:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 35 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:09:44,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:46,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:09:46,541 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 34 treesize of output 30 [2024-11-24 00:09:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 35 proven. 364 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645994577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:47,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 37] total 109 [2024-11-24 00:09:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141547662] [2024-11-24 00:09:47,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:47,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-24 00:09:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:47,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-24 00:09:47,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=11397, Unknown=0, NotChecked=0, Total=11772 [2024-11-24 00:09:47,757 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 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) [2024-11-24 00:09:53,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:53,172 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2024-11-24 00:09:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-24 00:09:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 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) Word has length 147 [2024-11-24 00:09:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:53,173 INFO L225 Difference]: With dead ends: 231 [2024-11-24 00:09:53,173 INFO L226 Difference]: Without dead ends: 164 [2024-11-24 00:09:53,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5243 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=642, Invalid=19950, Unknown=0, NotChecked=0, Total=20592 [2024-11-24 00:09:53,174 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 6856 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2640 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:53,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2640 Invalid, 6864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 6856 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-24 00:09:53,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-24 00:09:53,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2024-11-24 00:09:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 157 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) [2024-11-24 00:09:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2024-11-24 00:09:53,177 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 147 [2024-11-24 00:09:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:53,177 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2024-11-24 00:09:53,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.2844036697247705) internal successors, (358), 109 states have internal predecessors, (358), 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) [2024-11-24 00:09:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2024-11-24 00:09:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-24 00:09:53,178 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:53,179 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:53,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-24 00:09:53,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-24 00:09:53,383 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:53,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1332582754, now seen corresponding path program 13 times [2024-11-24 00:09:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:53,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789646240] [2024-11-24 00:09:53,383 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:09:53,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789646240] [2024-11-24 00:09:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789646240] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453591588] [2024-11-24 00:09:54,483 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:09:54,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:54,485 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-24 00:09:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:54,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-24 00:09:54,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:55,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:55,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:09:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453591588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:09:56,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:09:56,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 51 [2024-11-24 00:09:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418349662] [2024-11-24 00:09:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:56,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-24 00:09:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:09:56,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-24 00:09:56,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2355, Unknown=0, NotChecked=0, Total=2652 [2024-11-24 00:09:56,183 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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) [2024-11-24 00:09:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:57,164 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2024-11-24 00:09:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 00:09:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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) Word has length 151 [2024-11-24 00:09:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:57,166 INFO L225 Difference]: With dead ends: 160 [2024-11-24 00:09:57,166 INFO L226 Difference]: Without dead ends: 160 [2024-11-24 00:09:57,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 265 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=3379, Unknown=0, NotChecked=0, Total=3782 [2024-11-24 00:09:57,166 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:57,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 946 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-24 00:09:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-24 00:09:57,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2024-11-24 00:09:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 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) [2024-11-24 00:09:57,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-11-24 00:09:57,169 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 151 [2024-11-24 00:09:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:57,169 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-11-24 00:09:57,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.705882352941177) internal successors, (240), 52 states have internal predecessors, (240), 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) [2024-11-24 00:09:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-11-24 00:09:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-24 00:09:57,170 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:57,170 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:09:57,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-24 00:09:57,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-24 00:09:57,371 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:09:57,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -132761243, now seen corresponding path program 17 times [2024-11-24 00:09:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:09:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961311636] [2024-11-24 00:09:57,371 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:09:57,501 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-24 00:09:57,501 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 459 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:09:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:09:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961311636] [2024-11-24 00:09:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961311636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364607014] [2024-11-24 00:09:58,652 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:09:58,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:58,654 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:58,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-24 00:09:59,447 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-24 00:09:59,447 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:09:59,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-11-24 00:09:59,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:00,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:10:00,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:10:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:10:01,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:03,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:10:03,899 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 34 treesize of output 30 [2024-11-24 00:10:03,980 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 7 treesize of output 3 [2024-11-24 00:10:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 459 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-11-24 00:10:04,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364607014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:04,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:04,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49, 40] total 109 [2024-11-24 00:10:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100027214] [2024-11-24 00:10:04,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:04,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-24 00:10:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:04,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-24 00:10:04,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=11433, Unknown=0, NotChecked=0, Total=11772 [2024-11-24 00:10:04,845 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 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) [2024-11-24 00:10:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:11,149 INFO L93 Difference]: Finished difference Result 438 states and 443 transitions. [2024-11-24 00:10:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-24 00:10:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 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) Word has length 156 [2024-11-24 00:10:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:11,150 INFO L225 Difference]: With dead ends: 438 [2024-11-24 00:10:11,150 INFO L226 Difference]: Without dead ends: 174 [2024-11-24 00:10:11,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=807, Invalid=26915, Unknown=0, NotChecked=0, Total=27722 [2024-11-24 00:10:11,151 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 77 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 6950 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 6968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:11,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2685 Invalid, 6968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6950 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-24 00:10:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-24 00:10:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2024-11-24 00:10:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 167 states have internal predecessors, (170), 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) [2024-11-24 00:10:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2024-11-24 00:10:11,154 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 156 [2024-11-24 00:10:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:11,154 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2024-11-24 00:10:11,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.5688073394495414) internal successors, (389), 109 states have internal predecessors, (389), 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) [2024-11-24 00:10:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2024-11-24 00:10:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-11-24 00:10:11,155 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:11,155 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:11,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-24 00:10:11,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-24 00:10:11,355 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:11,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1212296169, now seen corresponding path program 18 times [2024-11-24 00:10:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733123997] [2024-11-24 00:10:11,356 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:10:11,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:11,491 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-24 00:10:11,491 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:12,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733123997] [2024-11-24 00:10:12,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733123997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:12,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424561307] [2024-11-24 00:10:12,807 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:10:12,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:12,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:12,809 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:12,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-24 00:10:14,888 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-11-24 00:10:14,888 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:14,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-24 00:10:14,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:15,357 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:16,102 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 7 treesize of output 5 [2024-11-24 00:10:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:16,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424561307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:16,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:16,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 53 [2024-11-24 00:10:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258941911] [2024-11-24 00:10:16,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:16,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-24 00:10:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:16,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-24 00:10:16,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2439, Unknown=0, NotChecked=0, Total=2862 [2024-11-24 00:10:16,385 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 54 states, 53 states have (on average 4.981132075471698) internal successors, (264), 54 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:10:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:17,110 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2024-11-24 00:10:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-24 00:10:17,111 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.981132075471698) internal successors, (264), 54 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2024-11-24 00:10:17,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:17,112 INFO L225 Difference]: With dead ends: 177 [2024-11-24 00:10:17,112 INFO L226 Difference]: Without dead ends: 177 [2024-11-24 00:10:17,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 289 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=876, Invalid=4526, Unknown=0, NotChecked=0, Total=5402 [2024-11-24 00:10:17,112 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 102 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:17,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 291 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-24 00:10:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-24 00:10:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2024-11-24 00:10:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 171 states have (on average 1.023391812865497) internal successors, (175), 172 states have internal predecessors, (175), 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) [2024-11-24 00:10:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-11-24 00:10:17,114 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 164 [2024-11-24 00:10:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:17,114 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-11-24 00:10:17,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.981132075471698) internal successors, (264), 54 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:10:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-11-24 00:10:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-24 00:10:17,115 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:17,115 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:17,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-24 00:10:17,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:17,316 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:17,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1080480872, now seen corresponding path program 14 times [2024-11-24 00:10:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:17,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131500888] [2024-11-24 00:10:17,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:10:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:17,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:10:17,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 120 proven. 415 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131500888] [2024-11-24 00:10:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131500888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924422083] [2024-11-24 00:10:18,617 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:10:18,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:18,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:18,619 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:18,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-24 00:10:18,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:10:18,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:18,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-24 00:10:18,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 153 proven. 382 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:19,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:20,316 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 21 treesize of output 17 [2024-11-24 00:10:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 153 proven. 382 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924422083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:20,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 67 [2024-11-24 00:10:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425955586] [2024-11-24 00:10:20,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:20,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-24 00:10:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:20,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-24 00:10:20,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=3960, Unknown=0, NotChecked=0, Total=4556 [2024-11-24 00:10:20,916 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 68 states, 67 states have (on average 4.686567164179104) internal successors, (314), 68 states have internal predecessors, (314), 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) [2024-11-24 00:10:22,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:22,154 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2024-11-24 00:10:22,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-24 00:10:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.686567164179104) internal successors, (314), 68 states have internal predecessors, (314), 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) Word has length 166 [2024-11-24 00:10:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:22,156 INFO L225 Difference]: With dead ends: 175 [2024-11-24 00:10:22,156 INFO L226 Difference]: Without dead ends: 175 [2024-11-24 00:10:22,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=730, Invalid=5432, Unknown=0, NotChecked=0, Total=6162 [2024-11-24 00:10:22,156 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 3 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:22,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1069 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-24 00:10:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-24 00:10:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2024-11-24 00:10:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.023121387283237) internal successors, (177), 174 states have internal predecessors, (177), 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) [2024-11-24 00:10:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2024-11-24 00:10:22,159 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 166 [2024-11-24 00:10:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:22,159 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2024-11-24 00:10:22,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.686567164179104) internal successors, (314), 68 states have internal predecessors, (314), 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) [2024-11-24 00:10:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2024-11-24 00:10:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-24 00:10:22,160 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:22,160 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:22,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-24 00:10:22,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:22,360 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:22,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:22,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2101706923, now seen corresponding path program 19 times [2024-11-24 00:10:22,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:22,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407691278] [2024-11-24 00:10:22,361 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:10:22,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:10:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407691278] [2024-11-24 00:10:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407691278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027047580] [2024-11-24 00:10:23,794 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:10:23,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:23,796 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:23,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-24 00:10:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:10:24,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-24 00:10:24,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:24,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:10:24,765 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:24,765 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:24,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:10:24,881 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 16 treesize of output 12 [2024-11-24 00:10:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 21 proven. 565 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027047580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:25,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-11-24 00:10:25,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872969765] [2024-11-24 00:10:25,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:25,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-24 00:10:25,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:25,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-24 00:10:25,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 00:10:25,054 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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) [2024-11-24 00:10:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:26,243 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2024-11-24 00:10:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-24 00:10:26,243 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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) Word has length 171 [2024-11-24 00:10:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:26,244 INFO L225 Difference]: With dead ends: 305 [2024-11-24 00:10:26,244 INFO L226 Difference]: Without dead ends: 182 [2024-11-24 00:10:26,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=173, Invalid=2907, Unknown=0, NotChecked=0, Total=3080 [2024-11-24 00:10:26,244 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 26 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:26,244 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2132 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-24 00:10:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-24 00:10:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2024-11-24 00:10:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 178 states have internal predecessors, (181), 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) [2024-11-24 00:10:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2024-11-24 00:10:26,246 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 171 [2024-11-24 00:10:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:26,247 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2024-11-24 00:10:26,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.282608695652174) internal successors, (197), 46 states have internal predecessors, (197), 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) [2024-11-24 00:10:26,247 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2024-11-24 00:10:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-24 00:10:26,247 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:26,248 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:26,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-24 00:10:26,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:26,448 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:26,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash 183911762, now seen corresponding path program 20 times [2024-11-24 00:10:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319719630] [2024-11-24 00:10:26,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:10:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:26,502 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:10:26,503 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:27,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319719630] [2024-11-24 00:10:27,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319719630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:27,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930282765] [2024-11-24 00:10:27,984 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:10:27,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:27,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:27,986 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:27,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-24 00:10:28,338 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:10:28,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:28,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-24 00:10:28,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:29,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:30,003 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 21 treesize of output 17 [2024-11-24 00:10:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-24 00:10:30,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930282765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:30,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:30,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2024-11-24 00:10:30,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625399894] [2024-11-24 00:10:30,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:30,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-24 00:10:30,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:30,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-24 00:10:30,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=3841, Unknown=0, NotChecked=0, Total=4422 [2024-11-24 00:10:30,735 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand has 67 states, 66 states have (on average 5.090909090909091) internal successors, (336), 67 states have internal predecessors, (336), 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) [2024-11-24 00:10:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:31,813 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2024-11-24 00:10:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-24 00:10:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 5.090909090909091) internal successors, (336), 67 states have internal predecessors, (336), 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) Word has length 175 [2024-11-24 00:10:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:31,814 INFO L225 Difference]: With dead ends: 188 [2024-11-24 00:10:31,814 INFO L226 Difference]: Without dead ends: 188 [2024-11-24 00:10:31,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1555 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=633, Invalid=4059, Unknown=0, NotChecked=0, Total=4692 [2024-11-24 00:10:31,815 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 14 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:31,815 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1297 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 00:10:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-24 00:10:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2024-11-24 00:10:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 1.021978021978022) internal successors, (186), 183 states have internal predecessors, (186), 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) [2024-11-24 00:10:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2024-11-24 00:10:31,818 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 175 [2024-11-24 00:10:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:31,819 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2024-11-24 00:10:31,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 5.090909090909091) internal successors, (336), 67 states have internal predecessors, (336), 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) [2024-11-24 00:10:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2024-11-24 00:10:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2024-11-24 00:10:31,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:31,820 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:31,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-24 00:10:32,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:32,021 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:32,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash 645544467, now seen corresponding path program 15 times [2024-11-24 00:10:32,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:32,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834360758] [2024-11-24 00:10:32,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:10:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:32,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-24 00:10:32,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 565 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834360758] [2024-11-24 00:10:33,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834360758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:33,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677660119] [2024-11-24 00:10:33,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:10:33,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:33,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:33,620 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:33,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-24 00:10:35,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-24 00:10:35,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:35,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-11-24 00:10:35,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:36,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:10:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 565 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:37,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:37,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:10:38,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:10:38,151 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 16 treesize of output 12 [2024-11-24 00:10:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 839 backedges. 43 proven. 565 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:38,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677660119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:38,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:38,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 43, 32] total 94 [2024-11-24 00:10:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582115450] [2024-11-24 00:10:38,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:38,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-24 00:10:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:38,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-24 00:10:38,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=8451, Unknown=0, NotChecked=0, Total=8742 [2024-11-24 00:10:38,829 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 94 states, 94 states have (on average 3.5) internal successors, (329), 94 states have internal predecessors, (329), 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) [2024-11-24 00:10:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:41,939 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2024-11-24 00:10:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-24 00:10:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.5) internal successors, (329), 94 states have internal predecessors, (329), 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) Word has length 177 [2024-11-24 00:10:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:41,941 INFO L225 Difference]: With dead ends: 272 [2024-11-24 00:10:41,941 INFO L226 Difference]: Without dead ends: 191 [2024-11-24 00:10:41,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4131 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=543, Invalid=14463, Unknown=0, NotChecked=0, Total=15006 [2024-11-24 00:10:41,942 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 47 mSDsluCounter, 2871 mSDsCounter, 0 mSdLazyCounter, 4878 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:41,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2926 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4878 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-24 00:10:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-24 00:10:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-11-24 00:10:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.021505376344086) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:10:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2024-11-24 00:10:41,944 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 177 [2024-11-24 00:10:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:41,944 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2024-11-24 00:10:41,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.5) internal successors, (329), 94 states have internal predecessors, (329), 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) [2024-11-24 00:10:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2024-11-24 00:10:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-24 00:10:41,945 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:41,945 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:41,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-24 00:10:42,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:42,146 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:42,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash -574127430, now seen corresponding path program 16 times [2024-11-24 00:10:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588041483] [2024-11-24 00:10:42,146 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:10:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:42,208 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:10:42,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 153 proven. 496 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:43,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:43,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588041483] [2024-11-24 00:10:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588041483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:43,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138013829] [2024-11-24 00:10:43,276 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:10:43,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:43,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:43,277 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:43,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-24 00:10:44,040 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:10:44,040 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:44,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-11-24 00:10:44,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:44,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 00:10:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 190 proven. 459 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:44,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 190 proven. 459 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:46,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138013829] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:10:46,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:10:46,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2024-11-24 00:10:46,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075071248] [2024-11-24 00:10:46,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:46,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-24 00:10:46,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:10:46,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-24 00:10:46,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=4546, Unknown=0, NotChecked=0, Total=5112 [2024-11-24 00:10:46,896 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 72 states, 71 states have (on average 4.788732394366197) internal successors, (340), 72 states have internal predecessors, (340), 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) [2024-11-24 00:10:48,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:10:48,548 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2024-11-24 00:10:48,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-24 00:10:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.788732394366197) internal successors, (340), 72 states have internal predecessors, (340), 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) Word has length 181 [2024-11-24 00:10:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:10:48,549 INFO L225 Difference]: With dead ends: 190 [2024-11-24 00:10:48,549 INFO L226 Difference]: Without dead ends: 190 [2024-11-24 00:10:48,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=724, Invalid=6416, Unknown=0, NotChecked=0, Total=7140 [2024-11-24 00:10:48,550 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:10:48,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1641 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2692 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-24 00:10:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-24 00:10:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2024-11-24 00:10:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 189 states have internal predecessors, (192), 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) [2024-11-24 00:10:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2024-11-24 00:10:48,553 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 181 [2024-11-24 00:10:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:10:48,553 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2024-11-24 00:10:48,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.788732394366197) internal successors, (340), 72 states have internal predecessors, (340), 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) [2024-11-24 00:10:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2024-11-24 00:10:48,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-24 00:10:48,554 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:10:48,554 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:10:48,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-24 00:10:48,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:48,754 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:10:48,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:10:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1149612343, now seen corresponding path program 21 times [2024-11-24 00:10:48,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:10:48,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781118247] [2024-11-24 00:10:48,755 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:10:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:10:48,910 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-24 00:10:48,910 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 682 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:10:51,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:10:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781118247] [2024-11-24 00:10:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781118247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852458696] [2024-11-24 00:10:51,975 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:10:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:10:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:10:51,977 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:10:51,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-24 00:10:54,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-24 00:10:54,572 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:10:54,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 222 conjuncts are in the unsatisfiable core [2024-11-24 00:10:54,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:10:56,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:10:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 913 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:10:59,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:59,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:11:00,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:11:00,390 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 16 treesize of output 12 [2024-11-24 00:11:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 23 proven. 682 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:11:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852458696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 59, 34] total 135 [2024-11-24 00:11:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327346987] [2024-11-24 00:11:01,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:01,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2024-11-24 00:11:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:01,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2024-11-24 00:11:01,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=17602, Unknown=0, NotChecked=0, Total=18090 [2024-11-24 00:11:01,480 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 135 states, 135 states have (on average 3.4296296296296296) internal successors, (463), 135 states have internal predecessors, (463), 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) [2024-11-24 00:11:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:06,016 INFO L93 Difference]: Finished difference Result 292 states and 295 transitions. [2024-11-24 00:11:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-24 00:11:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.4296296296296296) internal successors, (463), 135 states have internal predecessors, (463), 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) Word has length 186 [2024-11-24 00:11:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:06,018 INFO L225 Difference]: With dead ends: 292 [2024-11-24 00:11:06,018 INFO L226 Difference]: Without dead ends: 204 [2024-11-24 00:11:06,019 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6108 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=604, Invalid=21448, Unknown=0, NotChecked=0, Total=22052 [2024-11-24 00:11:06,019 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 58 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 8720 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3877 SdHoareTripleChecker+Invalid, 8731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 8720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:06,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3877 Invalid, 8731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 8720 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-24 00:11:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-24 00:11:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2024-11-24 00:11:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 193 states have internal predecessors, (196), 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) [2024-11-24 00:11:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2024-11-24 00:11:06,023 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 186 [2024-11-24 00:11:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:06,023 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2024-11-24 00:11:06,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.4296296296296296) internal successors, (463), 135 states have internal predecessors, (463), 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) [2024-11-24 00:11:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2024-11-24 00:11:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-11-24 00:11:06,024 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:06,025 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:06,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-24 00:11:06,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-24 00:11:06,225 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:11:06,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash -293154302, now seen corresponding path program 22 times [2024-11-24 00:11:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:06,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420545196] [2024-11-24 00:11:06,226 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:11:06,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:06,335 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:11:06,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 23 proven. 958 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:11:08,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:11:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420545196] [2024-11-24 00:11:08,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420545196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:08,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063908861] [2024-11-24 00:11:08,707 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:11:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:08,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:08,709 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:08,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-24 00:11:09,451 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:11:09,451 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:09,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-11-24 00:11:09,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:10,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:11:10,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:11:10,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:11:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:11:14,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:11:14,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-11-24 00:11:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 23 proven. 958 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:11:14,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:17,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-11-24 00:11:17,436 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 62 treesize of output 54 [2024-11-24 00:11:17,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-24 00:11:17,559 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 77 treesize of output 69 [2024-11-24 00:11:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 23 proven. 727 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-11-24 00:11:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063908861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:18,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 60, 48] total 132 [2024-11-24 00:11:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490876110] [2024-11-24 00:11:18,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:18,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2024-11-24 00:11:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:18,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2024-11-24 00:11:18,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=16689, Unknown=0, NotChecked=0, Total=17292 [2024-11-24 00:11:18,885 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 132 states, 132 states have (on average 3.5833333333333335) internal successors, (473), 132 states have internal predecessors, (473), 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) [2024-11-24 00:11:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:24,187 INFO L93 Difference]: Finished difference Result 342 states and 345 transitions. [2024-11-24 00:11:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-24 00:11:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 3.5833333333333335) internal successors, (473), 132 states have internal predecessors, (473), 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) Word has length 190 [2024-11-24 00:11:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:24,189 INFO L225 Difference]: With dead ends: 342 [2024-11-24 00:11:24,189 INFO L226 Difference]: Without dead ends: 201 [2024-11-24 00:11:24,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=654, Invalid=19368, Unknown=0, NotChecked=0, Total=20022 [2024-11-24 00:11:24,190 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 9722 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 9733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 9722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:24,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3694 Invalid, 9733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 9722 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-24 00:11:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-24 00:11:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2024-11-24 00:11:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 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) [2024-11-24 00:11:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-11-24 00:11:24,192 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 190 [2024-11-24 00:11:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:24,192 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-11-24 00:11:24,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 3.5833333333333335) internal successors, (473), 132 states have internal predecessors, (473), 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) [2024-11-24 00:11:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-11-24 00:11:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-24 00:11:24,193 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:24,193 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:24,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-24 00:11:24,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-24 00:11:24,394 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:11:24,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1517656581, now seen corresponding path program 23 times [2024-11-24 00:11:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:24,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880952025] [2024-11-24 00:11:24,394 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:11:24,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:24,561 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-24 00:11:24,561 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:25,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:11:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880952025] [2024-11-24 00:11:25,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880952025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:25,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542382098] [2024-11-24 00:11:25,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:11:25,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:25,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:25,770 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:25,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-24 00:11:27,063 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-24 00:11:27,063 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:27,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-24 00:11:27,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:28,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:28,884 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 21 treesize of output 17 [2024-11-24 00:11:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:29,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542382098] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:29,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:29,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 71 [2024-11-24 00:11:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96508854] [2024-11-24 00:11:29,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:29,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-24 00:11:29,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:29,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-24 00:11:29,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=4440, Unknown=0, NotChecked=0, Total=5112 [2024-11-24 00:11:29,701 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 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) [2024-11-24 00:11:30,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:30,807 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2024-11-24 00:11:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 00:11:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 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) Word has length 194 [2024-11-24 00:11:30,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:30,809 INFO L225 Difference]: With dead ends: 207 [2024-11-24 00:11:30,809 INFO L226 Difference]: Without dead ends: 207 [2024-11-24 00:11:30,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=729, Invalid=4673, Unknown=0, NotChecked=0, Total=5402 [2024-11-24 00:11:30,809 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:30,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1482 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 00:11:30,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-24 00:11:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2024-11-24 00:11:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 202 states have internal predecessors, (205), 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) [2024-11-24 00:11:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2024-11-24 00:11:30,813 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 194 [2024-11-24 00:11:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:30,813 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2024-11-24 00:11:30,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 5.098591549295775) internal successors, (362), 72 states have internal predecessors, (362), 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) [2024-11-24 00:11:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2024-11-24 00:11:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-24 00:11:30,814 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:30,814 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:30,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-24 00:11:31,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:31,015 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:11:31,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:31,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1820906620, now seen corresponding path program 17 times [2024-11-24 00:11:31,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:31,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511384021] [2024-11-24 00:11:31,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:11:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:31,137 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-24 00:11:31,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 231 proven. 543 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:11:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511384021] [2024-11-24 00:11:32,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511384021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:32,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963534222] [2024-11-24 00:11:32,605 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:11:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:32,606 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:32,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-24 00:11:34,639 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-24 00:11:34,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:34,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-24 00:11:34,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:34,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 00:11:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 231 proven. 543 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:35,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 231 proven. 543 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963534222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:37,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:37,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 76 [2024-11-24 00:11:37,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093861995] [2024-11-24 00:11:37,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:37,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-24 00:11:37,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:37,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-24 00:11:37,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=5182, Unknown=0, NotChecked=0, Total=5852 [2024-11-24 00:11:37,854 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand has 77 states, 76 states have (on average 4.815789473684211) internal successors, (366), 77 states have internal predecessors, (366), 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) [2024-11-24 00:11:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:39,731 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2024-11-24 00:11:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-24 00:11:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.815789473684211) internal successors, (366), 77 states have internal predecessors, (366), 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) Word has length 196 [2024-11-24 00:11:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:39,732 INFO L225 Difference]: With dead ends: 205 [2024-11-24 00:11:39,732 INFO L226 Difference]: Without dead ends: 205 [2024-11-24 00:11:39,733 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=841, Invalid=7169, Unknown=0, NotChecked=0, Total=8010 [2024-11-24 00:11:39,733 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 3 mSDsluCounter, 1751 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1815 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:39,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1815 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 00:11:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-24 00:11:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-24 00:11:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.019704433497537) internal successors, (207), 204 states have internal predecessors, (207), 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) [2024-11-24 00:11:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2024-11-24 00:11:39,736 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 196 [2024-11-24 00:11:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:39,737 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2024-11-24 00:11:39,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.815789473684211) internal successors, (366), 77 states have internal predecessors, (366), 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) [2024-11-24 00:11:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2024-11-24 00:11:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-24 00:11:39,738 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:39,738 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:11:39,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-24 00:11:39,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-24 00:11:39,939 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:11:39,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1058027961, now seen corresponding path program 24 times [2024-11-24 00:11:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:11:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126514410] [2024-11-24 00:11:39,939 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:11:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:11:40,145 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-24 00:11:40,145 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 1111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:11:45,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:11:45,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126514410] [2024-11-24 00:11:45,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126514410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:45,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083503240] [2024-11-24 00:11:45,939 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:11:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:45,941 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:45,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-24 00:11:51,140 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-24 00:11:51,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:11:51,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-11-24 00:11:51,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:52,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:11:55,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:11:55,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-11-24 00:11:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 231 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:11:55,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:57,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:11:57,164 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 16 treesize of output 12 [2024-11-24 00:11:57,168 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 15 treesize of output 11 [2024-11-24 00:11:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 231 proven. 604 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:11:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083503240] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:11:58,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:11:58,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 43, 31] total 140 [2024-11-24 00:11:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723344642] [2024-11-24 00:11:58,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:11:58,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-11-24 00:11:58,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:11:58,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-11-24 00:11:58,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=18713, Unknown=0, NotChecked=0, Total=19740 [2024-11-24 00:11:58,613 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 141 states, 140 states have (on average 3.942857142857143) internal successors, (552), 141 states have internal predecessors, (552), 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) [2024-11-24 00:12:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:09,766 INFO L93 Difference]: Finished difference Result 375 states and 380 transitions. [2024-11-24 00:12:09,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-11-24 00:12:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 3.942857142857143) internal successors, (552), 141 states have internal predecessors, (552), 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) Word has length 201 [2024-11-24 00:12:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:09,768 INFO L225 Difference]: With dead ends: 375 [2024-11-24 00:12:09,768 INFO L226 Difference]: Without dead ends: 375 [2024-11-24 00:12:09,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16908 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2415, Invalid=48887, Unknown=0, NotChecked=0, Total=51302 [2024-11-24 00:12:09,770 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 183 mSDsluCounter, 2418 mSDsCounter, 0 mSdLazyCounter, 6881 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 6884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:09,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 2476 Invalid, 6884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6881 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-11-24 00:12:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-24 00:12:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 210. [2024-11-24 00:12:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 209 states have internal predecessors, (212), 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) [2024-11-24 00:12:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2024-11-24 00:12:09,774 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 201 [2024-11-24 00:12:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:09,775 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2024-11-24 00:12:09,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 3.942857142857143) internal successors, (552), 141 states have internal predecessors, (552), 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) [2024-11-24 00:12:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2024-11-24 00:12:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-11-24 00:12:09,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:09,776 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:09,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-24 00:12:09,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:09,977 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:12:09,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1142378952, now seen corresponding path program 18 times [2024-11-24 00:12:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:09,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150132251] [2024-11-24 00:12:09,977 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:12:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:10,205 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-24 00:12:10,205 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 524 proven. 337 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:12:12,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150132251] [2024-11-24 00:12:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150132251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562228039] [2024-11-24 00:12:12,379 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:12:12,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:12,381 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:12,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-24 00:12:19,849 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-11-24 00:12:19,850 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:19,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 152 conjuncts are in the unsatisfiable core [2024-11-24 00:12:19,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:20,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:12:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 51 proven. 810 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:12:21,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:21,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:12:22,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:12:22,132 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 16 treesize of output 12 [2024-11-24 00:12:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1137 backedges. 51 proven. 810 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-24 00:12:22,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562228039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:12:22,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:12:22,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36, 36] total 72 [2024-11-24 00:12:22,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63739366] [2024-11-24 00:12:22,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:12:22,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-24 00:12:22,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:22,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-24 00:12:22,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=4877, Unknown=0, NotChecked=0, Total=5112 [2024-11-24 00:12:22,335 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand has 72 states, 72 states have (on average 4.458333333333333) internal successors, (321), 72 states have internal predecessors, (321), 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) [2024-11-24 00:12:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:30,316 INFO L93 Difference]: Finished difference Result 568 states and 571 transitions. [2024-11-24 00:12:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2024-11-24 00:12:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.458333333333333) internal successors, (321), 72 states have internal predecessors, (321), 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) Word has length 203 [2024-11-24 00:12:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:30,317 INFO L225 Difference]: With dead ends: 568 [2024-11-24 00:12:30,317 INFO L226 Difference]: Without dead ends: 224 [2024-11-24 00:12:30,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7311 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1392, Invalid=29760, Unknown=0, NotChecked=0, Total=31152 [2024-11-24 00:12:30,319 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 63 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 5999 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 6047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 5999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:30,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 2396 Invalid, 6047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 5999 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-24 00:12:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-24 00:12:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 218. [2024-11-24 00:12:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 217 states have internal predecessors, (220), 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) [2024-11-24 00:12:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2024-11-24 00:12:30,324 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 203 [2024-11-24 00:12:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:30,324 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2024-11-24 00:12:30,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.458333333333333) internal successors, (321), 72 states have internal predecessors, (321), 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) [2024-11-24 00:12:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2024-11-24 00:12:30,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-24 00:12:30,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:30,325 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:30,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-24 00:12:30,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:30,526 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:12:30,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1060182826, now seen corresponding path program 19 times [2024-11-24 00:12:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:30,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196289652] [2024-11-24 00:12:30,527 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:12:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 231 proven. 679 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:32,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196289652] [2024-11-24 00:12:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196289652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409697879] [2024-11-24 00:12:32,560 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:12:32,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:32,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:32,562 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:32,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-24 00:12:32,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:32,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-11-24 00:12:32,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 276 proven. 634 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:33,775 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:34,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:12:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 276 proven. 634 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:35,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409697879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:12:35,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:12:35,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 67 [2024-11-24 00:12:35,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097495502] [2024-11-24 00:12:35,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:12:35,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-24 00:12:35,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:35,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-24 00:12:35,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=4043, Unknown=0, NotChecked=0, Total=4556 [2024-11-24 00:12:35,191 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand has 68 states, 67 states have (on average 4.895522388059701) internal successors, (328), 68 states have internal predecessors, (328), 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) [2024-11-24 00:12:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:36,783 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2024-11-24 00:12:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 00:12:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.895522388059701) internal successors, (328), 68 states have internal predecessors, (328), 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) Word has length 211 [2024-11-24 00:12:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:36,785 INFO L225 Difference]: With dead ends: 220 [2024-11-24 00:12:36,785 INFO L226 Difference]: Without dead ends: 220 [2024-11-24 00:12:36,785 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 373 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=689, Invalid=5953, Unknown=0, NotChecked=0, Total=6642 [2024-11-24 00:12:36,785 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 6 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 2521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:36,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1467 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2521 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-24 00:12:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-24 00:12:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2024-11-24 00:12:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.018348623853211) internal successors, (222), 219 states have internal predecessors, (222), 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) [2024-11-24 00:12:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2024-11-24 00:12:36,789 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 211 [2024-11-24 00:12:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:36,789 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2024-11-24 00:12:36,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.895522388059701) internal successors, (328), 68 states have internal predecessors, (328), 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) [2024-11-24 00:12:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2024-11-24 00:12:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-24 00:12:36,791 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:36,791 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:36,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-24 00:12:36,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-11-24 00:12:36,991 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:12:36,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash 260562477, now seen corresponding path program 25 times [2024-11-24 00:12:36,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:36,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080704184] [2024-11-24 00:12:36,992 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:12:36,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:38,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080704184] [2024-11-24 00:12:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080704184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601903953] [2024-11-24 00:12:38,873 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:12:38,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:38,875 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-24 00:12:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:39,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 268 conjuncts are in the unsatisfiable core [2024-11-24 00:12:39,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:39,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:12:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:41,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:41,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:12:41,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:12:41,581 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 16 treesize of output 12 [2024-11-24 00:12:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 27 proven. 949 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:12:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601903953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:12:41,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:12:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 38] total 74 [2024-11-24 00:12:41,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671302003] [2024-11-24 00:12:41,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:12:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-24 00:12:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:41,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-24 00:12:41,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=5241, Unknown=0, NotChecked=0, Total=5402 [2024-11-24 00:12:41,798 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 74 states, 74 states have (on average 4.554054054054054) internal successors, (337), 74 states have internal predecessors, (337), 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) [2024-11-24 00:12:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:49,241 INFO L93 Difference]: Finished difference Result 597 states and 602 transitions. [2024-11-24 00:12:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-11-24 00:12:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 4.554054054054054) internal successors, (337), 74 states have internal predecessors, (337), 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) Word has length 216 [2024-11-24 00:12:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:49,243 INFO L225 Difference]: With dead ends: 597 [2024-11-24 00:12:49,243 INFO L226 Difference]: Without dead ends: 234 [2024-11-24 00:12:49,244 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2996 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=534, Invalid=21222, Unknown=0, NotChecked=0, Total=21756 [2024-11-24 00:12:49,245 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 64 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 10638 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 4060 SdHoareTripleChecker+Invalid, 10664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 10638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:49,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 4060 Invalid, 10664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 10638 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-24 00:12:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-24 00:12:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2024-11-24 00:12:49,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 227 states have internal predecessors, (230), 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) [2024-11-24 00:12:49,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2024-11-24 00:12:49,248 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 216 [2024-11-24 00:12:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:49,248 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2024-11-24 00:12:49,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 4.554054054054054) internal successors, (337), 74 states have internal predecessors, (337), 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) [2024-11-24 00:12:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2024-11-24 00:12:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-11-24 00:12:49,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:49,249 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:49,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:49,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:49,450 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:12:49,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1641255391, now seen corresponding path program 26 times [2024-11-24 00:12:49,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:49,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465330880] [2024-11-24 00:12:49,451 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:12:49,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:49,537 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:12:49,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 276 proven. 753 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:12:51,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:51,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465330880] [2024-11-24 00:12:51,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465330880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:51,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687760136] [2024-11-24 00:12:51,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:12:51,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:51,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:51,579 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:51,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-24 00:12:52,021 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:12:52,021 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:52,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-24 00:12:52,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 325 proven. 704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:12:52,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:53,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:12:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 325 proven. 704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:12:54,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687760136] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:12:54,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:12:54,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 68 [2024-11-24 00:12:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813989502] [2024-11-24 00:12:54,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:12:54,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-24 00:12:54,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:12:54,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-24 00:12:54,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=4151, Unknown=0, NotChecked=0, Total=4692 [2024-11-24 00:12:54,526 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 69 states, 68 states have (on average 5.132352941176471) internal successors, (349), 69 states have internal predecessors, (349), 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) [2024-11-24 00:12:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:56,048 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2024-11-24 00:12:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-24 00:12:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 5.132352941176471) internal successors, (349), 69 states have internal predecessors, (349), 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) Word has length 224 [2024-11-24 00:12:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:56,049 INFO L225 Difference]: With dead ends: 237 [2024-11-24 00:12:56,049 INFO L226 Difference]: Without dead ends: 237 [2024-11-24 00:12:56,049 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 397 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=592, Invalid=4378, Unknown=0, NotChecked=0, Total=4970 [2024-11-24 00:12:56,050 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 13 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 3120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:56,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1911 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-24 00:12:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-24 00:12:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 233. [2024-11-24 00:12:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 states have internal predecessors, (235), 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) [2024-11-24 00:12:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2024-11-24 00:12:56,053 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 224 [2024-11-24 00:12:56,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:56,053 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2024-11-24 00:12:56,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 5.132352941176471) internal successors, (349), 69 states have internal predecessors, (349), 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) [2024-11-24 00:12:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2024-11-24 00:12:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2024-11-24 00:12:56,055 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:56,055 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:12:56,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-24 00:12:56,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2024-11-24 00:12:56,256 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:12:56,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:56,256 INFO L85 PathProgramCache]: Analyzing trace with hash 993433440, now seen corresponding path program 20 times [2024-11-24 00:12:56,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:12:56,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802623984] [2024-11-24 00:12:56,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:12:56,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:12:56,320 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:12:56,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 276 proven. 781 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:12:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:12:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802623984] [2024-11-24 00:12:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802623984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756113660] [2024-11-24 00:12:58,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:12:58,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:58,404 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:58,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-24 00:12:58,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:12:58,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:12:58,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-11-24 00:12:58,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 325 proven. 732 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:12:59,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:00,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:13:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1435 backedges. 325 proven. 732 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:13:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756113660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:13:01,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:13:01,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 72 [2024-11-24 00:13:01,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403423515] [2024-11-24 00:13:01,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:13:01,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-24 00:13:01,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:13:01,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-24 00:13:01,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=4675, Unknown=0, NotChecked=0, Total=5256 [2024-11-24 00:13:01,334 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 73 states, 72 states have (on average 4.888888888888889) internal successors, (352), 73 states have internal predecessors, (352), 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) [2024-11-24 00:13:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:13:03,415 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2024-11-24 00:13:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-24 00:13:03,416 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.888888888888889) internal successors, (352), 73 states have internal predecessors, (352), 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) Word has length 226 [2024-11-24 00:13:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:13:03,417 INFO L225 Difference]: With dead ends: 235 [2024-11-24 00:13:03,417 INFO L226 Difference]: Without dead ends: 235 [2024-11-24 00:13:03,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 400 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=778, Invalid=6878, Unknown=0, NotChecked=0, Total=7656 [2024-11-24 00:13:03,418 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 6 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 3475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:13:03,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1966 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3475 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 00:13:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-24 00:13:03,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-24 00:13:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 234 states have internal predecessors, (237), 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) [2024-11-24 00:13:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2024-11-24 00:13:03,420 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 226 [2024-11-24 00:13:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:13:03,421 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2024-11-24 00:13:03,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.888888888888889) internal successors, (352), 73 states have internal predecessors, (352), 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) [2024-11-24 00:13:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2024-11-24 00:13:03,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-24 00:13:03,422 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:13:03,422 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:13:03,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-24 00:13:03,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-11-24 00:13:03,622 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:13:03,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:13:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1482935837, now seen corresponding path program 27 times [2024-11-24 00:13:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:13:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465836642] [2024-11-24 00:13:03,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:03,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:13:03,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-24 00:13:03,860 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 29 proven. 1099 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-24 00:13:08,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:13:08,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465836642] [2024-11-24 00:13:08,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465836642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:13:08,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147205755] [2024-11-24 00:13:08,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:08,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:08,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:13:08,237 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:13:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-24 00:13:13,794 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-24 00:13:13,794 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:13,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-11-24 00:13:13,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:13:15,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:13:19,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-24 00:13:19,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-24 00:13:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 29 proven. 1477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:13:19,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:20,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-24 00:13:22,491 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 15 treesize of output 11 [2024-11-24 00:13:22,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:13:22,501 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 16 treesize of output 12 [2024-11-24 00:13:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 325 proven. 856 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-11-24 00:13:25,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147205755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:13:25,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:13:25,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 70, 40] total 148 [2024-11-24 00:13:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884630679] [2024-11-24 00:13:25,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:13:25,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-24 00:13:25,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:13:25,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-24 00:13:25,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=20664, Unknown=0, NotChecked=0, Total=21756 [2024-11-24 00:13:25,259 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 148 states, 148 states have (on average 3.5675675675675675) internal successors, (528), 148 states have internal predecessors, (528), 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) [2024-11-24 00:13:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:13:32,765 INFO L93 Difference]: Finished difference Result 421 states and 425 transitions. [2024-11-24 00:13:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-24 00:13:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.5675675675675675) internal successors, (528), 148 states have internal predecessors, (528), 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) Word has length 231 [2024-11-24 00:13:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:13:32,767 INFO L225 Difference]: With dead ends: 421 [2024-11-24 00:13:32,767 INFO L226 Difference]: Without dead ends: 247 [2024-11-24 00:13:32,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7108 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1732, Invalid=31210, Unknown=0, NotChecked=0, Total=32942 [2024-11-24 00:13:32,768 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 120 mSDsluCounter, 3872 mSDsCounter, 0 mSdLazyCounter, 10418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 3938 SdHoareTripleChecker+Invalid, 10463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 10418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:13:32,768 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 3938 Invalid, 10463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 10418 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-24 00:13:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-24 00:13:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2024-11-24 00:13:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 243 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:13:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2024-11-24 00:13:32,770 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 231 [2024-11-24 00:13:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:13:32,770 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2024-11-24 00:13:32,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.5675675675675675) internal successors, (528), 148 states have internal predecessors, (528), 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) [2024-11-24 00:13:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2024-11-24 00:13:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-24 00:13:32,771 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:13:32,771 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:13:32,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-24 00:13:32,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-11-24 00:13:32,972 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:13:32,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:13:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1360506677, now seen corresponding path program 21 times [2024-11-24 00:13:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:13:32,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269820384] [2024-11-24 00:13:32,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:13:33,201 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-24 00:13:33,201 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 59 proven. 1099 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:13:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:13:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269820384] [2024-11-24 00:13:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269820384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:13:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871524459] [2024-11-24 00:13:35,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:13:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:13:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:13:35,575 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:13:35,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-24 00:13:41,277 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-24 00:13:41,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:13:41,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 340 conjuncts are in the unsatisfiable core [2024-11-24 00:13:41,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:13:42,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:13:43,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:13:44,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:13:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 59 proven. 1534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:13:48,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:52,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:13:52,296 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 34 treesize of output 30 [2024-11-24 00:13:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1593 backedges. 59 proven. 1099 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:13:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871524459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:13:54,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:13:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 72, 55] total 164 [2024-11-24 00:13:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113225506] [2024-11-24 00:13:54,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:13:54,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2024-11-24 00:13:54,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:13:54,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2024-11-24 00:13:54,771 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=26115, Unknown=0, NotChecked=0, Total=26732 [2024-11-24 00:13:54,772 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 164 states, 164 states have (on average 3.5365853658536586) internal successors, (580), 164 states have internal predecessors, (580), 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) [2024-11-24 00:14:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:14:04,682 INFO L93 Difference]: Finished difference Result 363 states and 365 transitions. [2024-11-24 00:14:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-24 00:14:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 3.5365853658536586) internal successors, (580), 164 states have internal predecessors, (580), 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) Word has length 237 [2024-11-24 00:14:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:14:04,683 INFO L225 Difference]: With dead ends: 363 [2024-11-24 00:14:04,683 INFO L226 Difference]: Without dead ends: 254 [2024-11-24 00:14:04,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10595 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=763, Invalid=31817, Unknown=0, NotChecked=0, Total=32580 [2024-11-24 00:14:04,684 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 54 mSDsluCounter, 5793 mSDsCounter, 0 mSdLazyCounter, 15810 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 5861 SdHoareTripleChecker+Invalid, 15824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 15810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:14:04,684 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 5861 Invalid, 15824 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 15810 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2024-11-24 00:14:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-24 00:14:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2024-11-24 00:14:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 1.016260162601626) internal successors, (250), 247 states have internal predecessors, (250), 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) [2024-11-24 00:14:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 250 transitions. [2024-11-24 00:14:04,687 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 250 transitions. Word has length 237 [2024-11-24 00:14:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:14:04,687 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 250 transitions. [2024-11-24 00:14:04,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 3.5365853658536586) internal successors, (580), 164 states have internal predecessors, (580), 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) [2024-11-24 00:14:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 250 transitions. [2024-11-24 00:14:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2024-11-24 00:14:04,688 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:14:04,688 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:14:04,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-24 00:14:04,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:04,889 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:14:04,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:14:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash 129486066, now seen corresponding path program 22 times [2024-11-24 00:14:04,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:14:04,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545203533] [2024-11-24 00:14:04,889 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:14:04,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:14:04,958 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:14:04,958 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 325 proven. 890 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:06,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:14:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545203533] [2024-11-24 00:14:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545203533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:14:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834977375] [2024-11-24 00:14:06,732 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:14:06,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:06,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:14:06,734 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:14:06,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-24 00:14:08,061 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:14:08,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:08,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-24 00:14:08,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:08,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-24 00:14:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 378 proven. 837 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:09,438 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:14:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 378 proven. 837 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834977375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:14:12,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:14:12,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 91 [2024-11-24 00:14:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031590367] [2024-11-24 00:14:12,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:14:12,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-24 00:14:12,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:14:12,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-24 00:14:12,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=7438, Unknown=0, NotChecked=0, Total=8372 [2024-11-24 00:14:12,449 INFO L87 Difference]: Start difference. First operand 248 states and 250 transitions. Second operand has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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) [2024-11-24 00:14:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:14:14,899 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2024-11-24 00:14:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-24 00:14:14,899 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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) Word has length 241 [2024-11-24 00:14:14,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:14:14,900 INFO L225 Difference]: With dead ends: 250 [2024-11-24 00:14:14,900 INFO L226 Difference]: Without dead ends: 250 [2024-11-24 00:14:14,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2895 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1174, Invalid=10598, Unknown=0, NotChecked=0, Total=11772 [2024-11-24 00:14:14,901 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 3777 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 3777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:14:14,901 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2297 Invalid, 3777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3777 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-24 00:14:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-24 00:14:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2024-11-24 00:14:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 248 states have (on average 1.0161290322580645) internal successors, (252), 249 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:14:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2024-11-24 00:14:14,904 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 241 [2024-11-24 00:14:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:14:14,904 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2024-11-24 00:14:14,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.8791208791208796) internal successors, (444), 92 states have internal predecessors, (444), 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) [2024-11-24 00:14:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2024-11-24 00:14:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2024-11-24 00:14:14,906 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:14:14,906 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:14:14,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-24 00:14:15,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-24 00:14:15,107 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:14:15,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:14:15,107 INFO L85 PathProgramCache]: Analyzing trace with hash -306731119, now seen corresponding path program 28 times [2024-11-24 00:14:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:14:15,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462588545] [2024-11-24 00:14:15,107 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:14:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:14:15,234 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:14:15,234 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:17,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:14:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462588545] [2024-11-24 00:14:17,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462588545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:14:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105680700] [2024-11-24 00:14:17,286 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:14:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:14:17,288 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:14:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-24 00:14:18,789 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:14:18,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:18,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-24 00:14:18,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:20,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:14:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:14:22,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:14:22,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:14:22,458 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 16 treesize of output 12 [2024-11-24 00:14:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 31 proven. 1260 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:22,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105680700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:14:22,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:14:22,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 55, 39] total 93 [2024-11-24 00:14:22,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985753531] [2024-11-24 00:14:22,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:14:22,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2024-11-24 00:14:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:14:22,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2024-11-24 00:14:22,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=8259, Unknown=0, NotChecked=0, Total=8556 [2024-11-24 00:14:22,716 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand has 93 states, 93 states have (on average 4.666666666666667) internal successors, (434), 93 states have internal predecessors, (434), 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) [2024-11-24 00:14:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:14:26,547 INFO L93 Difference]: Finished difference Result 438 states and 441 transitions. [2024-11-24 00:14:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-24 00:14:26,547 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.666666666666667) internal successors, (434), 93 states have internal predecessors, (434), 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) Word has length 246 [2024-11-24 00:14:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:14:26,548 INFO L225 Difference]: With dead ends: 438 [2024-11-24 00:14:26,548 INFO L226 Difference]: Without dead ends: 257 [2024-11-24 00:14:26,549 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=367, Invalid=10975, Unknown=0, NotChecked=0, Total=11342 [2024-11-24 00:14:26,550 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 40 mSDsluCounter, 5715 mSDsCounter, 0 mSdLazyCounter, 8639 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 5819 SdHoareTripleChecker+Invalid, 8654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 8639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:14:26,550 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 5819 Invalid, 8654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 8639 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-24 00:14:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-11-24 00:14:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2024-11-24 00:14:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 253 states have internal predecessors, (256), 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) [2024-11-24 00:14:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2024-11-24 00:14:26,553 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 246 [2024-11-24 00:14:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:14:26,554 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2024-11-24 00:14:26,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.666666666666667) internal successors, (434), 93 states have internal predecessors, (434), 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) [2024-11-24 00:14:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2024-11-24 00:14:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2024-11-24 00:14:26,555 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:14:26,555 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:14:26,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-24 00:14:26,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2024-11-24 00:14:26,756 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:14:26,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:14:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1306721418, now seen corresponding path program 29 times [2024-11-24 00:14:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:14:26,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928144947] [2024-11-24 00:14:26,756 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:14:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:14:26,933 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-24 00:14:26,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 435 proven. 917 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:28,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:14:28,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928144947] [2024-11-24 00:14:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928144947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:14:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464179057] [2024-11-24 00:14:28,800 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:14:28,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:28,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:14:28,801 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:14:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-24 00:14:33,826 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-24 00:14:33,826 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:33,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-24 00:14:33,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 435 proven. 917 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:35,387 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:14:36,657 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 21 treesize of output 17 [2024-11-24 00:14:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 435 proven. 917 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-11-24 00:14:37,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464179057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:14:37,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:14:37,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 91 [2024-11-24 00:14:37,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172121530] [2024-11-24 00:14:37,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:14:37,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-24 00:14:37,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:14:37,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-24 00:14:37,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1110, Invalid=7262, Unknown=0, NotChecked=0, Total=8372 [2024-11-24 00:14:37,992 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand has 92 states, 91 states have (on average 5.1208791208791204) internal successors, (466), 92 states have internal predecessors, (466), 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) [2024-11-24 00:14:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:14:39,833 INFO L93 Difference]: Finished difference Result 263 states and 265 transitions. [2024-11-24 00:14:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-24 00:14:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 5.1208791208791204) internal successors, (466), 92 states have internal predecessors, (466), 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) Word has length 250 [2024-11-24 00:14:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:14:39,834 INFO L225 Difference]: With dead ends: 263 [2024-11-24 00:14:39,834 INFO L226 Difference]: Without dead ends: 263 [2024-11-24 00:14:39,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1183, Invalid=7559, Unknown=0, NotChecked=0, Total=8742 [2024-11-24 00:14:39,835 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 17 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 3854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:14:39,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2339 Invalid, 3854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-24 00:14:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-24 00:14:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2024-11-24 00:14:39,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 257 states have (on average 1.0155642023346303) internal successors, (261), 258 states have internal predecessors, (261), 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) [2024-11-24 00:14:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2024-11-24 00:14:39,839 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 250 [2024-11-24 00:14:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:14:39,839 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2024-11-24 00:14:39,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 5.1208791208791204) internal successors, (466), 92 states have internal predecessors, (466), 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) [2024-11-24 00:14:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2024-11-24 00:14:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2024-11-24 00:14:39,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:14:39,841 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:14:39,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-24 00:14:40,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:40,042 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:14:40,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:14:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1628832587, now seen corresponding path program 23 times [2024-11-24 00:14:40,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:14:40,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343354838] [2024-11-24 00:14:40,043 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:14:40,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:14:40,266 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-24 00:14:40,266 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 63 proven. 1260 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:14:44,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:14:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343354838] [2024-11-24 00:14:44,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343354838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:14:44,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153456150] [2024-11-24 00:14:44,445 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:14:44,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:14:44,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:14:44,447 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:14:44,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-24 00:14:55,490 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-11-24 00:14:55,490 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:14:55,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 355 conjuncts are in the unsatisfiable core [2024-11-24 00:14:55,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:14:56,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-24 00:14:58,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:14:58,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:15:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 63 proven. 1756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:15:05,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:15:11,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-24 00:15:11,446 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 34 treesize of output 30 [2024-11-24 00:15:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 63 proven. 1260 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:15:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153456150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:15:15,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:15:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 76, 58] total 186 [2024-11-24 00:15:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818203151] [2024-11-24 00:15:15,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:15:15,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2024-11-24 00:15:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:15:15,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2024-11-24 00:15:15,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=33803, Unknown=0, NotChecked=0, Total=34410 [2024-11-24 00:15:15,470 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 186 states, 186 states have (on average 3.317204301075269) internal successors, (617), 186 states have internal predecessors, (617), 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) [2024-11-24 00:15:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:15:37,635 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2024-11-24 00:15:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-11-24 00:15:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 3.317204301075269) internal successors, (617), 186 states have internal predecessors, (617), 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) Word has length 252 [2024-11-24 00:15:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:15:37,636 INFO L225 Difference]: With dead ends: 385 [2024-11-24 00:15:37,636 INFO L226 Difference]: Without dead ends: 269 [2024-11-24 00:15:37,639 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12917 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1224, Invalid=73032, Unknown=0, NotChecked=0, Total=74256 [2024-11-24 00:15:37,639 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 65 mSDsluCounter, 7015 mSDsCounter, 0 mSdLazyCounter, 19123 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 7086 SdHoareTripleChecker+Invalid, 19138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 19123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:15:37,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 7086 Invalid, 19138 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 19123 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2024-11-24 00:15:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-24 00:15:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 263. [2024-11-24 00:15:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 262 states have internal predecessors, (265), 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) [2024-11-24 00:15:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2024-11-24 00:15:37,642 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 252 [2024-11-24 00:15:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:15:37,642 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2024-11-24 00:15:37,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 3.317204301075269) internal successors, (617), 186 states have internal predecessors, (617), 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) [2024-11-24 00:15:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2024-11-24 00:15:37,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-24 00:15:37,643 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:15:37,643 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:15:37,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-24 00:15:37,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2024-11-24 00:15:37,844 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:15:37,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:15:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1236481092, now seen corresponding path program 24 times [2024-11-24 00:15:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:15:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131542952] [2024-11-24 00:15:37,845 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:15:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:15:38,036 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-24 00:15:38,037 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:15:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 378 proven. 1006 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:15:40,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:15:40,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131542952] [2024-11-24 00:15:40,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131542952] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:15:40,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181911551] [2024-11-24 00:15:40,818 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:15:40,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:15:40,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:15:40,820 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:15:40,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-24 00:16:32,707 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-11-24 00:16:32,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:16:32,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-24 00:16:32,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:16:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 435 proven. 949 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:16:33,519 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:16:34,781 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 7 treesize of output 5 [2024-11-24 00:16:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 435 proven. 949 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:16:35,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181911551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:16:35,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:16:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 38, 38] total 82 [2024-11-24 00:16:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990577464] [2024-11-24 00:16:35,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:16:35,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-24 00:16:35,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:16:35,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-24 00:16:35,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1021, Invalid=5785, Unknown=0, NotChecked=0, Total=6806 [2024-11-24 00:16:35,321 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 83 states, 82 states have (on average 4.878048780487805) internal successors, (400), 83 states have internal predecessors, (400), 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) [2024-11-24 00:16:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:16:37,119 INFO L93 Difference]: Finished difference Result 265 states and 267 transitions. [2024-11-24 00:16:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-24 00:16:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.878048780487805) internal successors, (400), 83 states have internal predecessors, (400), 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) Word has length 256 [2024-11-24 00:16:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:16:37,120 INFO L225 Difference]: With dead ends: 265 [2024-11-24 00:16:37,120 INFO L226 Difference]: Without dead ends: 265 [2024-11-24 00:16:37,120 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 454 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6031 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2104, Invalid=11006, Unknown=0, NotChecked=0, Total=13110 [2024-11-24 00:16:37,121 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-24 00:16:37,121 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 755 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-24 00:16:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-24 00:16:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2024-11-24 00:16:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 263 states have (on average 1.015209125475285) internal successors, (267), 264 states have internal predecessors, (267), 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) [2024-11-24 00:16:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2024-11-24 00:16:37,123 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 256 [2024-11-24 00:16:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:16:37,124 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2024-11-24 00:16:37,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.878048780487805) internal successors, (400), 83 states have internal predecessors, (400), 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) [2024-11-24 00:16:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2024-11-24 00:16:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-24 00:16:37,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:16:37,125 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:16:37,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-24 00:16:37,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2024-11-24 00:16:37,326 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:16:37,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:16:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -5110913, now seen corresponding path program 30 times [2024-11-24 00:16:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:16:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273585891] [2024-11-24 00:16:37,327 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:16:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:16:37,609 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-24 00:16:37,610 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:16:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1432 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:16:40,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:16:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273585891] [2024-11-24 00:16:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273585891] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:16:40,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791598626] [2024-11-24 00:16:40,339 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:16:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:16:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:16:40,341 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:16:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-24 00:17:15,495 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-11-24 00:17:15,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:17:15,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 303 conjuncts are in the unsatisfiable core [2024-11-24 00:17:15,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:17:18,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:17:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1928 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:17:22,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:17:22,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:17:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:17:24,422 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 16 treesize of output 12 [2024-11-24 00:17:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1961 backedges. 33 proven. 1432 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-11-24 00:17:26,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791598626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:17:26,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:17:26,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 79, 44] total 158 [2024-11-24 00:17:26,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554851122] [2024-11-24 00:17:26,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:17:26,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2024-11-24 00:17:26,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:17:26,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2024-11-24 00:17:26,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=24361, Unknown=0, NotChecked=0, Total=24806 [2024-11-24 00:17:26,436 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand has 158 states, 158 states have (on average 4.10126582278481) internal successors, (648), 158 states have internal predecessors, (648), 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) [2024-11-24 00:17:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:17:42,882 INFO L93 Difference]: Finished difference Result 718 states and 723 transitions. [2024-11-24 00:17:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2024-11-24 00:17:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 4.10126582278481) internal successors, (648), 158 states have internal predecessors, (648), 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) Word has length 261 [2024-11-24 00:17:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:17:42,884 INFO L225 Difference]: With dead ends: 718 [2024-11-24 00:17:42,884 INFO L226 Difference]: Without dead ends: 279 [2024-11-24 00:17:42,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11706 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=1120, Invalid=61630, Unknown=0, NotChecked=0, Total=62750 [2024-11-24 00:17:42,888 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 106 mSDsluCounter, 7880 mSDsCounter, 0 mSdLazyCounter, 21144 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 7954 SdHoareTripleChecker+Invalid, 21178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 21144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:17:42,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 7954 Invalid, 21178 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 21144 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2024-11-24 00:17:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-24 00:17:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2024-11-24 00:17:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 271 states have (on average 1.014760147601476) internal successors, (275), 272 states have internal predecessors, (275), 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) [2024-11-24 00:17:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 275 transitions. [2024-11-24 00:17:42,891 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 275 transitions. Word has length 261 [2024-11-24 00:17:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:17:42,891 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 275 transitions. [2024-11-24 00:17:42,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 4.10126582278481) internal successors, (648), 158 states have internal predecessors, (648), 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) [2024-11-24 00:17:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 275 transitions. [2024-11-24 00:17:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-24 00:17:42,893 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:17:42,893 INFO L218 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:17:42,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-24 00:17:43,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:17:43,094 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:17:43,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:17:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -519075571, now seen corresponding path program 31 times [2024-11-24 00:17:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:17:43,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527645770] [2024-11-24 00:17:43,094 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:17:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:17:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:17:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 435 proven. 1095 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:45,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:17:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527645770] [2024-11-24 00:17:45,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527645770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:17:45,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212528279] [2024-11-24 00:17:45,510 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:17:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:17:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:17:45,512 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:17:45,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-24 00:17:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:17:46,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 164 conjuncts are in the unsatisfiable core [2024-11-24 00:17:46,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:17:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 496 proven. 1034 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:47,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:17:48,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:17:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2091 backedges. 496 proven. 1034 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:49,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212528279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:17:49,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:17:49,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2024-11-24 00:17:49,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692769311] [2024-11-24 00:17:49,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:17:49,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-24 00:17:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:17:49,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-24 00:17:49,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=5573, Unknown=0, NotChecked=0, Total=6320 [2024-11-24 00:17:49,238 INFO L87 Difference]: Start difference. First operand 273 states and 275 transitions. Second operand has 80 states, 79 states have (on average 5.253164556962025) internal successors, (415), 80 states have internal predecessors, (415), 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) [2024-11-24 00:17:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:17:51,394 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2024-11-24 00:17:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-24 00:17:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 5.253164556962025) internal successors, (415), 80 states have internal predecessors, (415), 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) Word has length 269 [2024-11-24 00:17:51,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:17:51,396 INFO L225 Difference]: With dead ends: 282 [2024-11-24 00:17:51,396 INFO L226 Difference]: Without dead ends: 282 [2024-11-24 00:17:51,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 478 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=806, Invalid=5836, Unknown=0, NotChecked=0, Total=6642 [2024-11-24 00:17:51,397 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 14 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2527 SdHoareTripleChecker+Invalid, 4291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:17:51,398 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2527 Invalid, 4291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-24 00:17:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-24 00:17:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2024-11-24 00:17:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.0144927536231885) internal successors, (280), 277 states have internal predecessors, (280), 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) [2024-11-24 00:17:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 280 transitions. [2024-11-24 00:17:51,408 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 280 transitions. Word has length 269 [2024-11-24 00:17:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:17:51,409 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 280 transitions. [2024-11-24 00:17:51,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 5.253164556962025) internal successors, (415), 80 states have internal predecessors, (415), 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) [2024-11-24 00:17:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 280 transitions. [2024-11-24 00:17:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-24 00:17:51,414 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:17:51,415 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:17:51,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-24 00:17:51,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:17:51,615 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:17:51,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:17:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -615417074, now seen corresponding path program 25 times [2024-11-24 00:17:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:17:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658761809] [2024-11-24 00:17:51,616 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:17:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:17:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:17:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 435 proven. 1129 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:17:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658761809] [2024-11-24 00:17:54,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658761809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:17:54,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640829514] [2024-11-24 00:17:54,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:17:54,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:17:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:17:54,647 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:17:54,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-24 00:17:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:17:55,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 168 conjuncts are in the unsatisfiable core [2024-11-24 00:17:55,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:17:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 496 proven. 1068 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:56,354 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:17:57,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:17:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 496 proven. 1068 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:17:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640829514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:17:58,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:17:58,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 83 [2024-11-24 00:17:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417931889] [2024-11-24 00:17:58,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:17:58,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-24 00:17:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:17:58,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-24 00:17:58,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=6179, Unknown=0, NotChecked=0, Total=6972 [2024-11-24 00:17:58,481 INFO L87 Difference]: Start difference. First operand 278 states and 280 transitions. Second operand has 84 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 84 states have internal predecessors, (416), 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) [2024-11-24 00:18:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:18:01,008 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2024-11-24 00:18:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-24 00:18:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 84 states have internal predecessors, (416), 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) Word has length 271 [2024-11-24 00:18:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:18:01,010 INFO L225 Difference]: With dead ends: 280 [2024-11-24 00:18:01,010 INFO L226 Difference]: Without dead ends: 280 [2024-11-24 00:18:01,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 481 SyntacticMatches, 18 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1055, Invalid=9247, Unknown=0, NotChecked=0, Total=10302 [2024-11-24 00:18:01,011 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 2340 mSDsCounter, 0 mSdLazyCounter, 4116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 4116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:18:01,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2422 Invalid, 4116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4116 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-24 00:18:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-24 00:18:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2024-11-24 00:18:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 278 states have (on average 1.014388489208633) internal successors, (282), 279 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:18:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 282 transitions. [2024-11-24 00:18:01,015 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 282 transitions. Word has length 271 [2024-11-24 00:18:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:18:01,016 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 282 transitions. [2024-11-24 00:18:01,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 5.0120481927710845) internal successors, (416), 84 states have internal predecessors, (416), 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) [2024-11-24 00:18:01,016 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 282 transitions. [2024-11-24 00:18:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-11-24 00:18:01,017 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:18:01,018 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:18:01,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-24 00:18:01,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:18:01,218 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:18:01,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:18:01,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1933415691, now seen corresponding path program 32 times [2024-11-24 00:18:01,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:18:01,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384154246] [2024-11-24 00:18:01,219 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:18:01,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:18:01,356 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:18:01,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:18:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:18:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:18:04,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384154246] [2024-11-24 00:18:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384154246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:18:04,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905775837] [2024-11-24 00:18:04,211 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:18:04,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:18:04,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:18:04,215 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:18:04,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-24 00:18:04,786 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:18:04,786 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:18:04,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-24 00:18:04,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:18:05,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:18:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:18:06,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:18:06,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:18:06,249 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 16 treesize of output 12 [2024-11-24 00:18:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:18:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905775837] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:18:06,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:18:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 67 [2024-11-24 00:18:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894865397] [2024-11-24 00:18:06,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:18:06,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-24 00:18:06,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:18:06,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-24 00:18:06,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4255, Unknown=0, NotChecked=0, Total=4422 [2024-11-24 00:18:06,525 INFO L87 Difference]: Start difference. First operand 280 states and 282 transitions. Second operand has 67 states, 67 states have (on average 4.507462686567164) internal successors, (302), 67 states have internal predecessors, (302), 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) [2024-11-24 00:18:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:18:09,455 INFO L93 Difference]: Finished difference Result 487 states and 490 transitions. [2024-11-24 00:18:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-24 00:18:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.507462686567164) internal successors, (302), 67 states have internal predecessors, (302), 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) Word has length 276 [2024-11-24 00:18:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:18:09,457 INFO L225 Difference]: With dead ends: 487 [2024-11-24 00:18:09,457 INFO L226 Difference]: Without dead ends: 287 [2024-11-24 00:18:09,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=257, Invalid=6715, Unknown=0, NotChecked=0, Total=6972 [2024-11-24 00:18:09,458 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 43 mSDsluCounter, 4938 mSDsCounter, 0 mSdLazyCounter, 5612 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 5041 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:18:09,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 5041 Invalid, 5629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5612 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-24 00:18:09,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-24 00:18:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2024-11-24 00:18:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 282 states have (on average 1.0141843971631206) internal successors, (286), 283 states have internal predecessors, (286), 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) [2024-11-24 00:18:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 286 transitions. [2024-11-24 00:18:09,461 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 286 transitions. Word has length 276 [2024-11-24 00:18:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:18:09,461 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 286 transitions. [2024-11-24 00:18:09,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.507462686567164) internal successors, (302), 67 states have internal predecessors, (302), 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) [2024-11-24 00:18:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 286 transitions. [2024-11-24 00:18:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-24 00:18:09,462 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:18:09,462 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:18:09,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-24 00:18:09,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:18:09,663 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:18:09,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:18:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1204651566, now seen corresponding path program 33 times [2024-11-24 00:18:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:18:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985630650] [2024-11-24 00:18:09,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:18:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:18:09,883 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-24 00:18:09,883 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:18:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 496 proven. 1223 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-24 00:18:13,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:18:13,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985630650] [2024-11-24 00:18:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985630650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:18:13,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122894167] [2024-11-24 00:18:13,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:18:13,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:18:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:18:13,383 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:18:13,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-24 00:18:26,608 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-24 00:18:26,608 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:18:26,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 391 conjuncts are in the unsatisfiable core [2024-11-24 00:18:26,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:18:29,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:18:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 35 proven. 2244 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:18:33,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:18:33,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:18:36,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:18:36,056 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 16 treesize of output 12 [2024-11-24 00:18:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 35 proven. 1615 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:18:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122894167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:18:38,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:18:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 81, 46] total 166 [2024-11-24 00:18:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439291788] [2024-11-24 00:18:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:18:38,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2024-11-24 00:18:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:18:38,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2024-11-24 00:18:38,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=26650, Unknown=0, NotChecked=0, Total=27390 [2024-11-24 00:18:38,247 INFO L87 Difference]: Start difference. First operand 284 states and 286 transitions. Second operand has 166 states, 166 states have (on average 4.198795180722891) internal successors, (697), 166 states have internal predecessors, (697), 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) [2024-11-24 00:19:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:19:00,584 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2024-11-24 00:19:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-11-24 00:19:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 4.198795180722891) internal successors, (697), 166 states have internal predecessors, (697), 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) Word has length 280 [2024-11-24 00:19:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:19:00,586 INFO L225 Difference]: With dead ends: 430 [2024-11-24 00:19:00,586 INFO L226 Difference]: Without dead ends: 300 [2024-11-24 00:19:00,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23460 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=3659, Invalid=97147, Unknown=0, NotChecked=0, Total=100806 [2024-11-24 00:19:00,588 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 161 mSDsluCounter, 6315 mSDsCounter, 0 mSdLazyCounter, 17799 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 6394 SdHoareTripleChecker+Invalid, 17854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 17799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:19:00,589 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 6394 Invalid, 17854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 17799 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-24 00:19:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-24 00:19:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 293. [2024-11-24 00:19:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.013745704467354) internal successors, (295), 292 states have internal predecessors, (295), 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) [2024-11-24 00:19:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2024-11-24 00:19:00,591 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 280 [2024-11-24 00:19:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:19:00,592 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2024-11-24 00:19:00,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 4.198795180722891) internal successors, (697), 166 states have internal predecessors, (697), 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) [2024-11-24 00:19:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2024-11-24 00:19:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2024-11-24 00:19:00,594 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:19:00,594 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:19:00,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-11-24 00:19:00,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:00,794 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:19:00,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:19:00,795 INFO L85 PathProgramCache]: Analyzing trace with hash -716215512, now seen corresponding path program 26 times [2024-11-24 00:19:00,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:19:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553443530] [2024-11-24 00:19:00,795 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:19:00,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:19:00,911 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:19:00,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 496 proven. 1259 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:04,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:19:04,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553443530] [2024-11-24 00:19:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553443530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:19:04,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185293513] [2024-11-24 00:19:04,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:19:04,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:19:04,261 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:19:04,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-24 00:19:04,854 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:19:04,854 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:04,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 1327 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-24 00:19:04,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:19:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 561 proven. 1194 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:06,171 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:19:07,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-24 00:19:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2385 backedges. 561 proven. 1194 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:08,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185293513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:19:08,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:19:08,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 88 [2024-11-24 00:19:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93593256] [2024-11-24 00:19:08,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:19:08,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-24 00:19:08,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:19:08,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-24 00:19:08,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=6955, Unknown=0, NotChecked=0, Total=7832 [2024-11-24 00:19:08,500 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 89 states, 88 states have (on average 5.0) internal successors, (440), 89 states have internal predecessors, (440), 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) [2024-11-24 00:19:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:19:11,564 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2024-11-24 00:19:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-24 00:19:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 5.0) internal successors, (440), 89 states have internal predecessors, (440), 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) Word has length 286 [2024-11-24 00:19:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:19:11,565 INFO L225 Difference]: With dead ends: 295 [2024-11-24 00:19:11,566 INFO L226 Difference]: Without dead ends: 295 [2024-11-24 00:19:11,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 508 SyntacticMatches, 19 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5058 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1164, Invalid=10392, Unknown=0, NotChecked=0, Total=11556 [2024-11-24 00:19:11,567 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 6 mSDsluCounter, 2743 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:19:11,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2829 Invalid, 4986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-24 00:19:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-24 00:19:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-11-24 00:19:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.0136518771331058) internal successors, (297), 294 states have internal predecessors, (297), 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) [2024-11-24 00:19:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2024-11-24 00:19:11,572 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 286 [2024-11-24 00:19:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:19:11,573 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2024-11-24 00:19:11,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 5.0) internal successors, (440), 89 states have internal predecessors, (440), 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) [2024-11-24 00:19:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2024-11-24 00:19:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2024-11-24 00:19:11,575 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:19:11,575 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:19:11,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-24 00:19:11,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:11,776 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:19:11,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:19:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 5798683, now seen corresponding path program 34 times [2024-11-24 00:19:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:19:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471420840] [2024-11-24 00:19:11,776 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:19:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:19:11,960 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:19:11,961 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 1809 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:19:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471420840] [2024-11-24 00:19:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471420840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:19:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709813117] [2024-11-24 00:19:14,872 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:19:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:19:14,874 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:19:14,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-24 00:19:23,256 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:19:23,257 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:23,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 1355 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-11-24 00:19:23,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:19:23,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:19:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 1809 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:23,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:19:23,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:19:23,922 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 16 treesize of output 12 [2024-11-24 00:19:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2476 backedges. 37 proven. 1809 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:24,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709813117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:19:24,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:19:24,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2024-11-24 00:19:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547013973] [2024-11-24 00:19:24,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:19:24,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-24 00:19:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:19:24,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-24 00:19:24,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2151, Unknown=0, NotChecked=0, Total=2256 [2024-11-24 00:19:24,198 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:19:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:19:26,743 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2024-11-24 00:19:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-24 00:19:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 291 [2024-11-24 00:19:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:19:26,744 INFO L225 Difference]: With dead ends: 513 [2024-11-24 00:19:26,744 INFO L226 Difference]: Without dead ends: 302 [2024-11-24 00:19:26,744 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=173, Invalid=3987, Unknown=0, NotChecked=0, Total=4160 [2024-11-24 00:19:26,744 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 42 mSDsluCounter, 4458 mSDsCounter, 0 mSdLazyCounter, 5112 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4566 SdHoareTripleChecker+Invalid, 5130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:19:26,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4566 Invalid, 5130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5112 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-24 00:19:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-24 00:19:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 299. [2024-11-24 00:19:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.0134680134680134) internal successors, (301), 298 states have internal predecessors, (301), 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) [2024-11-24 00:19:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 301 transitions. [2024-11-24 00:19:26,746 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 301 transitions. Word has length 291 [2024-11-24 00:19:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:19:26,747 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 301 transitions. [2024-11-24 00:19:26,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.833333333333333) internal successors, (232), 48 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:19:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 301 transitions. [2024-11-24 00:19:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2024-11-24 00:19:26,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:19:26,748 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:19:26,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-24 00:19:26,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2024-11-24 00:19:26,948 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:19:26,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:19:26,949 INFO L85 PathProgramCache]: Analyzing trace with hash 164521666, now seen corresponding path program 35 times [2024-11-24 00:19:26,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:19:26,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834019739] [2024-11-24 00:19:26,949 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:19:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:19:27,199 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-24 00:19:27,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2549 backedges. 630 proven. 1289 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:19:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834019739] [2024-11-24 00:19:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834019739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:19:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515343286] [2024-11-24 00:19:29,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:19:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:19:29,885 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:19:29,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-24 00:19:42,302 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-11-24 00:19:42,303 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:42,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 1368 conjuncts, 186 conjuncts are in the unsatisfiable core [2024-11-24 00:19:42,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:19:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2549 backedges. 630 proven. 1289 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:44,147 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:19:45,744 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 21 treesize of output 17 [2024-11-24 00:19:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2549 backedges. 630 proven. 1289 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-11-24 00:19:47,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515343286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:19:47,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:19:47,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 107 [2024-11-24 00:19:47,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148757144] [2024-11-24 00:19:47,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:19:47,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-24 00:19:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:19:47,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-24 00:19:47,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1531, Invalid=10025, Unknown=0, NotChecked=0, Total=11556 [2024-11-24 00:19:47,418 INFO L87 Difference]: Start difference. First operand 299 states and 301 transitions. Second operand has 108 states, 107 states have (on average 5.102803738317757) internal successors, (546), 108 states have internal predecessors, (546), 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) [2024-11-24 00:19:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:19:50,111 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2024-11-24 00:19:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 00:19:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 5.102803738317757) internal successors, (546), 108 states have internal predecessors, (546), 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) Word has length 295 [2024-11-24 00:19:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:19:50,113 INFO L225 Difference]: With dead ends: 308 [2024-11-24 00:19:50,113 INFO L226 Difference]: Without dead ends: 308 [2024-11-24 00:19:50,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1616, Invalid=10374, Unknown=0, NotChecked=0, Total=11990 [2024-11-24 00:19:50,114 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 13 mSDsluCounter, 3476 mSDsCounter, 0 mSdLazyCounter, 5763 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 5764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:19:50,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3567 Invalid, 5764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5763 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-24 00:19:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-24 00:19:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 304. [2024-11-24 00:19:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 303 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) [2024-11-24 00:19:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 306 transitions. [2024-11-24 00:19:50,117 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 306 transitions. Word has length 295 [2024-11-24 00:19:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:19:50,117 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 306 transitions. [2024-11-24 00:19:50,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 5.102803738317757) internal successors, (546), 108 states have internal predecessors, (546), 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) [2024-11-24 00:19:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 306 transitions. [2024-11-24 00:19:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2024-11-24 00:19:50,119 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:19:50,119 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:19:50,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-24 00:19:50,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:50,319 INFO L396 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:19:50,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:19:50,320 INFO L85 PathProgramCache]: Analyzing trace with hash -808468605, now seen corresponding path program 27 times [2024-11-24 00:19:50,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:19:50,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50731003] [2024-11-24 00:19:50,320 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:19:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:19:50,624 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-24 00:19:50,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:19:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 75 proven. 1809 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:19:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:19:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50731003] [2024-11-24 00:19:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50731003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:19:54,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763329223] [2024-11-24 00:19:54,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:19:54,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:19:54,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:19:54,021 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:19:54,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-24 00:20:12,433 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-24 00:20:12,433 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:20:12,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 371 conjuncts are in the unsatisfiable core [2024-11-24 00:20:12,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:20:13,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-24 00:20:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 75 proven. 1809 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:17,013 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:20:17,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-11-24 00:20:17,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-24 00:20:17,598 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 16 treesize of output 12 [2024-11-24 00:20:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2587 backedges. 75 proven. 1809 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:19,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763329223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:20:19,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:20:19,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 67, 48] total 143 [2024-11-24 00:20:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561592511] [2024-11-24 00:20:19,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:20:19,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2024-11-24 00:20:19,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:20:19,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2024-11-24 00:20:19,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=19868, Unknown=0, NotChecked=0, Total=20306 [2024-11-24 00:20:19,177 INFO L87 Difference]: Start difference. First operand 304 states and 306 transitions. Second operand has 143 states, 143 states have (on average 3.769230769230769) internal successors, (539), 143 states have internal predecessors, (539), 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) [2024-11-24 00:20:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:20:26,758 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2024-11-24 00:20:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2024-11-24 00:20:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 3.769230769230769) internal successors, (539), 143 states have internal predecessors, (539), 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) Word has length 297 [2024-11-24 00:20:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:20:26,760 INFO L225 Difference]: With dead ends: 448 [2024-11-24 00:20:26,760 INFO L226 Difference]: Without dead ends: 311 [2024-11-24 00:20:26,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9990 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=847, Invalid=34685, Unknown=0, NotChecked=0, Total=35532 [2024-11-24 00:20:26,761 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 66 mSDsluCounter, 7376 mSDsCounter, 0 mSdLazyCounter, 12715 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 7463 SdHoareTripleChecker+Invalid, 12733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 12715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:20:26,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 7463 Invalid, 12733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 12715 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-24 00:20:26,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2024-11-24 00:20:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2024-11-24 00:20:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 306 states have (on average 1.0130718954248366) internal successors, (310), 307 states have internal predecessors, (310), 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) [2024-11-24 00:20:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2024-11-24 00:20:26,763 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 297 [2024-11-24 00:20:26,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:20:26,763 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2024-11-24 00:20:26,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 3.769230769230769) internal successors, (539), 143 states have internal predecessors, (539), 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) [2024-11-24 00:20:26,764 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2024-11-24 00:20:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2024-11-24 00:20:26,765 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:20:26,765 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:20:26,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-24 00:20:26,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:20:26,966 INFO L396 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:20:26,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:20:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 724250410, now seen corresponding path program 28 times [2024-11-24 00:20:26,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:20:26,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419986857] [2024-11-24 00:20:26,967 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:20:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:20:27,070 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:20:27,070 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:20:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2660 backedges. 561 proven. 1396 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:30,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:20:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419986857] [2024-11-24 00:20:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419986857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:20:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787619849] [2024-11-24 00:20:30,203 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:20:30,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:20:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:20:30,204 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:20:30,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-24 00:20:34,009 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:20:34,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:20:34,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-11-24 00:20:34,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:20:34,027 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 [2024-11-24 00:20:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2660 backedges. 630 proven. 1327 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:35,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:20:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2660 backedges. 630 proven. 1327 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:40,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787619849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:20:40,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:20:40,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 112 [2024-11-24 00:20:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781141660] [2024-11-24 00:20:40,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:20:40,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-24 00:20:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:20:40,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-24 00:20:40,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1248, Invalid=11408, Unknown=0, NotChecked=0, Total=12656 [2024-11-24 00:20:40,121 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand has 113 states, 112 states have (on average 4.892857142857143) internal successors, (548), 113 states have internal predecessors, (548), 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) [2024-11-24 00:20:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:20:44,941 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2024-11-24 00:20:44,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-24 00:20:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 4.892857142857143) internal successors, (548), 113 states have internal predecessors, (548), 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) Word has length 301 [2024-11-24 00:20:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:20:44,942 INFO L225 Difference]: With dead ends: 310 [2024-11-24 00:20:44,942 INFO L226 Difference]: Without dead ends: 310 [2024-11-24 00:20:44,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2433, Invalid=21129, Unknown=0, NotChecked=0, Total=23562 [2024-11-24 00:20:44,944 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 9 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 5878 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 5878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:20:44,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 3394 Invalid, 5878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5878 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-24 00:20:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-24 00:20:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2024-11-24 00:20:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 308 states have (on average 1.0129870129870129) internal successors, (312), 309 states have internal predecessors, (312), 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) [2024-11-24 00:20:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 312 transitions. [2024-11-24 00:20:44,946 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 312 transitions. Word has length 301 [2024-11-24 00:20:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:20:44,946 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 312 transitions. [2024-11-24 00:20:44,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 4.892857142857143) internal successors, (548), 113 states have internal predecessors, (548), 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) [2024-11-24 00:20:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 312 transitions. [2024-11-24 00:20:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2024-11-24 00:20:44,948 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:20:44,948 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:20:44,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-11-24 00:20:45,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:20:45,148 INFO L396 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-24 00:20:45,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:20:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1801394087, now seen corresponding path program 36 times [2024-11-24 00:20:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:20:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620076133] [2024-11-24 00:20:45,149 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:20:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:20:45,533 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-11-24 00:20:45,533 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:20:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 39 proven. 2014 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-11-24 00:20:53,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:20:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620076133] [2024-11-24 00:20:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620076133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:20:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955418284] [2024-11-24 00:20:53,654 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:20:53,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:20:53,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:20:53,657 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:20:53,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c75ad36-7df6-4534-83f6-055af1798115/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process