./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1 --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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 14:24:12,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 14:24:12,989 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 14:24:12,993 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 14:24:12,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 14:24:13,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 14:24:13,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 14:24:13,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 14:24:13,016 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 14:24:13,016 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 14:24:13,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 14:24:13,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 14:24:13,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 14:24:13,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 14:24:13,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 14:24:13,018 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 14:24:13,018 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:13,019 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:13,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 14:24:13,019 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 14:24:13,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 14:24:13,020 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_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1 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 -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-12-02 14:24:13,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 14:24:13,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 14:24:13,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 14:24:13,236 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 14:24:13,236 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 14:24:13,237 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-12-02 14:24:15,939 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/data/cd98e863d/8923b2cb8eee478d92648ac8bddb1341/FLAG49758638f [2024-12-02 14:24:16,145 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 14:24:16,146 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-12-02 14:24:16,156 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/data/cd98e863d/8923b2cb8eee478d92648ac8bddb1341/FLAG49758638f [2024-12-02 14:24:16,168 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/data/cd98e863d/8923b2cb8eee478d92648ac8bddb1341 [2024-12-02 14:24:16,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 14:24:16,172 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 14:24:16,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 14:24:16,173 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 14:24:16,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 14:24:16,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,177 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d24572d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16, skipping insertion in model container [2024-12-02 14:24:16,177 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,199 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 14:24:16,438 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 14:24:16,439 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 14:24:16,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:24:16,453 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 14:24:16,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:24:16,514 INFO L204 MainTranslator]: Completed translation [2024-12-02 14:24:16,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16 WrapperNode [2024-12-02 14:24:16,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 14:24:16,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 14:24:16,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 14:24:16,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 14:24:16,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,547 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-12-02 14:24:16,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 14:24:16,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 14:24:16,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 14:24:16,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 14:24:16,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,571 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [4, 4]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 6 writes are split as follows [4, 2]. [2024-12-02 14:24:16,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,572 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,577 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,583 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 14:24:16,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 14:24:16,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 14:24:16,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 14:24:16,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (1/1) ... [2024-12-02 14:24:16,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:16,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 14:24:16,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 14:24:16,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 14:24:16,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 14:24:16,716 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 14:24:16,717 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 14:24:16,908 INFO L? ?]: Removed 67 outVars from TransFormulas that were not future-live. [2024-12-02 14:24:16,908 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 14:24:16,918 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 14:24:16,918 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 14:24:16,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:24:16 BoogieIcfgContainer [2024-12-02 14:24:16,919 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 14:24:16,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 14:24:16,921 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 14:24:16,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 14:24:16,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:24:16" (1/3) ... [2024-12-02 14:24:16,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b3a353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:24:16, skipping insertion in model container [2024-12-02 14:24:16,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:16" (2/3) ... [2024-12-02 14:24:16,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b3a353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:24:16, skipping insertion in model container [2024-12-02 14:24:16,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:24:16" (3/3) ... [2024-12-02 14:24:16,929 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-12-02 14:24:16,946 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 14:24:16,948 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrlcpy-alloca-1.i that has 1 procedures, 53 locations, 1 initial locations, 4 loop locations, and 17 error locations. [2024-12-02 14:24:16,982 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 14:24:16,994 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;@6f4646e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 14:24:16,994 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-12-02 14:24:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:24:17,003 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:17,003 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:17,004 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:17,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:17,007 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-12-02 14:24:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:17,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49625360] [2024-12-02 14:24:17,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:17,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:17,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:17,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49625360] [2024-12-02 14:24:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49625360] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:17,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:17,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:17,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223094924] [2024-12-02 14:24:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:17,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:17,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:17,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:17,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:17,244 INFO L87 Difference]: Start difference. First operand has 53 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 52 states have internal predecessors, (66), 0 states have call successors, (0), 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) [2024-12-02 14:24:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:17,289 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2024-12-02 14:24:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:17,291 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 [2024-12-02 14:24:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:17,295 INFO L225 Difference]: With dead ends: 69 [2024-12-02 14:24:17,295 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 14:24:17,296 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 [2024-12-02 14:24:17,298 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 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 [2024-12-02 14:24:17,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 14:24:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2024-12-02 14:24:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.7297297297297298) 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) [2024-12-02 14:24:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-12-02 14:24:17,324 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 8 [2024-12-02 14:24:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:17,325 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-12-02 14:24:17,325 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) [2024-12-02 14:24:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-12-02 14:24:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:24:17,325 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:17,325 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:17,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 14:24:17,326 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:17,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash 178583535, now seen corresponding path program 1 times [2024-12-02 14:24:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:17,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298132595] [2024-12-02 14:24:17,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:17,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:17,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:17,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298132595] [2024-12-02 14:24:17,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298132595] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:17,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:17,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:24:17,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935128564] [2024-12-02 14:24:17,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:17,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:24:17,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:17,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:24:17,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:24:17,445 INFO L87 Difference]: Start difference. First operand 54 states and 64 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) [2024-12-02 14:24:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:17,490 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2024-12-02 14:24:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:24:17,490 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 [2024-12-02 14:24:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:17,491 INFO L225 Difference]: With dead ends: 52 [2024-12-02 14:24:17,491 INFO L226 Difference]: Without dead ends: 52 [2024-12-02 14:24:17,491 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 [2024-12-02 14:24:17,492 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 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 [2024-12-02 14:24:17,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-12-02 14:24:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-12-02 14:24:17,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-12-02 14:24:17,496 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 8 [2024-12-02 14:24:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:17,496 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-12-02 14:24:17,496 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) [2024-12-02 14:24:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-12-02 14:24:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 14:24:17,497 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:17,497 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:17,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 14:24:17,497 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:17,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash 178583536, now seen corresponding path program 1 times [2024-12-02 14:24:17,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:17,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738219678] [2024-12-02 14:24:17,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:17,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:17,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738219678] [2024-12-02 14:24:17,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738219678] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:17,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:17,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:17,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796848770] [2024-12-02 14:24:17,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:17,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:17,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:17,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:17,703 INFO L87 Difference]: Start difference. First operand 52 states and 62 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) [2024-12-02 14:24:17,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:17,803 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2024-12-02 14:24:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:17,803 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 [2024-12-02 14:24:17,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:17,804 INFO L225 Difference]: With dead ends: 56 [2024-12-02 14:24:17,804 INFO L226 Difference]: Without dead ends: 56 [2024-12-02 14:24:17,804 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 [2024-12-02 14:24:17,805 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 28 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 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 [2024-12-02 14:24:17,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-12-02 14:24:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-12-02 14:24:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.65) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-12-02 14:24:17,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 8 [2024-12-02 14:24:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:17,809 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-12-02 14:24:17,809 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) [2024-12-02 14:24:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-12-02 14:24:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:24:17,810 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:17,810 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:17,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 14:24:17,810 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:17,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 631530201, now seen corresponding path program 1 times [2024-12-02 14:24:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555941617] [2024-12-02 14:24:17,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:17,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:17,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555941617] [2024-12-02 14:24:17,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555941617] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:17,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:17,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:17,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655608459] [2024-12-02 14:24:17,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:17,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:17,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:17,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:17,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:17,866 INFO L87 Difference]: Start difference. First operand 55 states and 66 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) [2024-12-02 14:24:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:17,909 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2024-12-02 14:24:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:17,910 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 [2024-12-02 14:24:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:17,911 INFO L225 Difference]: With dead ends: 74 [2024-12-02 14:24:17,911 INFO L226 Difference]: Without dead ends: 74 [2024-12-02 14:24:17,911 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 [2024-12-02 14:24:17,912 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:17,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:17,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-12-02 14:24:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2024-12-02 14:24:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 66 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) [2024-12-02 14:24:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-12-02 14:24:17,918 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 10 [2024-12-02 14:24:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:17,918 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-12-02 14:24:17,918 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) [2024-12-02 14:24:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-12-02 14:24:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:24:17,919 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:17,919 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:17,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 14:24:17,919 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:17,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 631532379, now seen corresponding path program 1 times [2024-12-02 14:24:17,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408145787] [2024-12-02 14:24:17,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:17,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:18,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408145787] [2024-12-02 14:24:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408145787] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:18,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:24:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139052327] [2024-12-02 14:24:18,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:18,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:24:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:18,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:24:18,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:24:18,007 INFO L87 Difference]: Start difference. First operand 67 states and 81 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) [2024-12-02 14:24:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:18,041 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-12-02 14:24:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:24:18,042 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 [2024-12-02 14:24:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:18,042 INFO L225 Difference]: With dead ends: 65 [2024-12-02 14:24:18,042 INFO L226 Difference]: Without dead ends: 65 [2024-12-02 14:24:18,042 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 [2024-12-02 14:24:18,043 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:18,043 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-12-02 14:24:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-12-02 14:24:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-12-02 14:24:18,048 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 10 [2024-12-02 14:24:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:18,048 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-12-02 14:24:18,048 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) [2024-12-02 14:24:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-12-02 14:24:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:24:18,049 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:18,049 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:18,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 14:24:18,049 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:18,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash 631532380, now seen corresponding path program 1 times [2024-12-02 14:24:18,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:18,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710838745] [2024-12-02 14:24:18,050 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710838745] [2024-12-02 14:24:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710838745] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:18,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:24:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142905193] [2024-12-02 14:24:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:18,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:18,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:18,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:18,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:18,186 INFO L87 Difference]: Start difference. First operand 65 states and 79 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) [2024-12-02 14:24:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:18,246 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2024-12-02 14:24:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:18,248 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 [2024-12-02 14:24:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:18,249 INFO L225 Difference]: With dead ends: 71 [2024-12-02 14:24:18,249 INFO L226 Difference]: Without dead ends: 71 [2024-12-02 14:24:18,249 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 [2024-12-02 14:24:18,250 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 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 [2024-12-02 14:24:18,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:18,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-12-02 14:24:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2024-12-02 14:24:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.5) internal successors, (81), 66 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) [2024-12-02 14:24:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2024-12-02 14:24:18,254 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 10 [2024-12-02 14:24:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:18,254 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2024-12-02 14:24:18,254 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) [2024-12-02 14:24:18,255 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2024-12-02 14:24:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:24:18,255 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:18,255 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:18,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 14:24:18,255 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:18,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1888429732, now seen corresponding path program 1 times [2024-12-02 14:24:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967995652] [2024-12-02 14:24:18,256 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:18,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:18,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967995652] [2024-12-02 14:24:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967995652] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:24:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209247936] [2024-12-02 14:24:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:18,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:24:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:18,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:24:18,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:24:18,447 INFO L87 Difference]: Start difference. First operand 67 states and 81 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) [2024-12-02 14:24:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:18,547 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2024-12-02 14:24:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:24:18,547 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 [2024-12-02 14:24:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:18,548 INFO L225 Difference]: With dead ends: 71 [2024-12-02 14:24:18,548 INFO L226 Difference]: Without dead ends: 71 [2024-12-02 14:24:18,548 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 [2024-12-02 14:24:18,549 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:18,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 111 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-12-02 14:24:18,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-12-02 14:24:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 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) [2024-12-02 14:24:18,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-12-02 14:24:18,554 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 10 [2024-12-02 14:24:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:18,554 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-12-02 14:24:18,554 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) [2024-12-02 14:24:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-12-02 14:24:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 14:24:18,555 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:18,555 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:18,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 14:24:18,555 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:18,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1888427554, now seen corresponding path program 1 times [2024-12-02 14:24:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:18,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849165434] [2024-12-02 14:24:18,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:18,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849165434] [2024-12-02 14:24:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849165434] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:18,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:18,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:24:18,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941696102] [2024-12-02 14:24:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:18,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:24:18,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:18,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:24:18,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:24:18,790 INFO L87 Difference]: Start difference. First operand 70 states and 85 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) [2024-12-02 14:24:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:18,865 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2024-12-02 14:24:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:24:18,865 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 [2024-12-02 14:24:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:18,866 INFO L225 Difference]: With dead ends: 76 [2024-12-02 14:24:18,866 INFO L226 Difference]: Without dead ends: 76 [2024-12-02 14:24:18,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:24:18,867 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 43 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:18,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 113 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:18,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-12-02 14:24:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-12-02 14:24:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 69 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) [2024-12-02 14:24:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2024-12-02 14:24:18,872 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 10 [2024-12-02 14:24:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:18,872 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2024-12-02 14:24:18,872 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) [2024-12-02 14:24:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2024-12-02 14:24:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 14:24:18,873 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:18,873 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:18,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 14:24:18,873 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:18,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1897332705, now seen corresponding path program 1 times [2024-12-02 14:24:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037626174] [2024-12-02 14:24:18,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:18,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037626174] [2024-12-02 14:24:19,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037626174] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:19,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:19,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:24:19,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842309838] [2024-12-02 14:24:19,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:19,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:19,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:19,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:19,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:19,005 INFO L87 Difference]: Start difference. First operand 70 states and 85 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) [2024-12-02 14:24:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:19,055 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-12-02 14:24:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:19,055 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 [2024-12-02 14:24:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:19,056 INFO L225 Difference]: With dead ends: 87 [2024-12-02 14:24:19,056 INFO L226 Difference]: Without dead ends: 87 [2024-12-02 14:24:19,056 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 [2024-12-02 14:24:19,057 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:19,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-12-02 14:24:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2024-12-02 14:24:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-12-02 14:24:19,062 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-12-02 14:24:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:19,062 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-12-02 14:24:19,062 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) [2024-12-02 14:24:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-12-02 14:24:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 14:24:19,063 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:19,063 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:19,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 14:24:19,063 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:19,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:19,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1217274335, now seen corresponding path program 1 times [2024-12-02 14:24:19,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:19,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988561167] [2024-12-02 14:24:19,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:19,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:19,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:19,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988561167] [2024-12-02 14:24:19,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988561167] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:19,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:19,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423853672] [2024-12-02 14:24:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:19,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:19,241 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:19,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:19,241 INFO L87 Difference]: Start difference. First operand 85 states and 104 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) [2024-12-02 14:24:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:19,307 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2024-12-02 14:24:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:19,307 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 [2024-12-02 14:24:19,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:19,308 INFO L225 Difference]: With dead ends: 104 [2024-12-02 14:24:19,308 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 14:24:19,308 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 [2024-12-02 14:24:19,309 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:19,309 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 109 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 14:24:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2024-12-02 14:24:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.4444444444444444) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2024-12-02 14:24:19,314 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 11 [2024-12-02 14:24:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:19,314 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2024-12-02 14:24:19,314 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) [2024-12-02 14:24:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2024-12-02 14:24:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 14:24:19,315 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:19,315 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:19,315 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 14:24:19,315 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:19,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1099378263, now seen corresponding path program 1 times [2024-12-02 14:24:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:19,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361217320] [2024-12-02 14:24:19,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:19,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361217320] [2024-12-02 14:24:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361217320] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:19,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351239850] [2024-12-02 14:24:19,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:19,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:19,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:19,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 14:24:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 14:24:19,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:19,638 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 [2024-12-02 14:24:19,650 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 [2024-12-02 14:24:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:19,873 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:20,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351239850] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:20,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:20,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-12-02 14:24:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831608248] [2024-12-02 14:24:20,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:20,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 14:24:20,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:20,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 14:24:20,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-12-02 14:24:20,089 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-12-02 14:24:20,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:20,280 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2024-12-02 14:24:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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 12 [2024-12-02 14:24:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:20,281 INFO L225 Difference]: With dead ends: 88 [2024-12-02 14:24:20,281 INFO L226 Difference]: Without dead ends: 88 [2024-12-02 14:24:20,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:24:20,282 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:20,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 205 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-12-02 14:24:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2024-12-02 14:24:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.4411764705882353) internal successors, (98), 79 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) [2024-12-02 14:24:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-12-02 14:24:20,286 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 12 [2024-12-02 14:24:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:20,286 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-12-02 14:24:20,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-12-02 14:24:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-12-02 14:24:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 14:24:20,287 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:20,287 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:20,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 14:24:20,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:20,488 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:20,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1315344789, now seen corresponding path program 1 times [2024-12-02 14:24:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:20,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857338449] [2024-12-02 14:24:20,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:20,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:20,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857338449] [2024-12-02 14:24:20,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857338449] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:20,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402669387] [2024-12-02 14:24:20,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:20,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:20,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:20,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:20,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 14:24:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:20,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 14:24:20,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:20,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 14:24:20,829 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 [2024-12-02 14:24:20,837 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 [2024-12-02 14:24:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:21,040 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:24:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402669387] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:21,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:21,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-12-02 14:24:21,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619650145] [2024-12-02 14:24:21,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:21,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 14:24:21,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:21,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 14:24:21,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-12-02 14:24:21,273 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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) [2024-12-02 14:24:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:21,482 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2024-12-02 14:24:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:24:21,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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 [2024-12-02 14:24:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:21,483 INFO L225 Difference]: With dead ends: 83 [2024-12-02 14:24:21,483 INFO L226 Difference]: Without dead ends: 83 [2024-12-02 14:24:21,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:24:21,484 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 51 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:21,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-12-02 14:24:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2024-12-02 14:24:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.4375) internal successors, (92), 74 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) [2024-12-02 14:24:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2024-12-02 14:24:21,487 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 14 [2024-12-02 14:24:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:21,487 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2024-12-02 14:24:21,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 16 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) [2024-12-02 14:24:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2024-12-02 14:24:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 14:24:21,488 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:21,488 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:21,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 14:24:21,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:21,689 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:21,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1315346967, now seen corresponding path program 1 times [2024-12-02 14:24:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:21,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351287651] [2024-12-02 14:24:21,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:21,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351287651] [2024-12-02 14:24:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351287651] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371240221] [2024-12-02 14:24:21,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:21,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:21,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:21,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 14:24:21,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:21,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 14:24:21,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 14:24:22,001 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 [2024-12-02 14:24:22,010 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 [2024-12-02 14:24:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:22,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:22,228 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:24:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:22,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371240221] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:22,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:24:22,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-12-02 14:24:22,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156812224] [2024-12-02 14:24:22,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:22,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:24:22,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:22,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:24:22,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:24:22,256 INFO L87 Difference]: Start difference. First operand 75 states and 92 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) [2024-12-02 14:24:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:22,366 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-12-02 14:24:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:24:22,367 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 [2024-12-02 14:24:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:22,367 INFO L225 Difference]: With dead ends: 74 [2024-12-02 14:24:22,367 INFO L226 Difference]: Without dead ends: 74 [2024-12-02 14:24:22,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-12-02 14:24:22,368 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:22,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 159 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-12-02 14:24:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2024-12-02 14:24:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:22,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2024-12-02 14:24:22,371 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 14 [2024-12-02 14:24:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:22,371 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2024-12-02 14:24:22,371 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) [2024-12-02 14:24:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2024-12-02 14:24:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 14:24:22,372 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:22,372 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:22,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 14:24:22,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:22,572 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:22,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1907850696, now seen corresponding path program 1 times [2024-12-02 14:24:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922252664] [2024-12-02 14:24:22,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:22,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:22,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922252664] [2024-12-02 14:24:22,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922252664] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:22,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:22,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:24:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136686585] [2024-12-02 14:24:22,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:22,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:22,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:22,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:24:22,761 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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) [2024-12-02 14:24:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:22,796 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2024-12-02 14:24:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:24:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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 [2024-12-02 14:24:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:22,797 INFO L225 Difference]: With dead ends: 67 [2024-12-02 14:24:22,797 INFO L226 Difference]: Without dead ends: 67 [2024-12-02 14:24:22,797 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 [2024-12-02 14:24:22,797 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:22,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-12-02 14:24:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2024-12-02 14:24:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.434782608695652) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-12-02 14:24:22,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 15 [2024-12-02 14:24:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:22,800 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-12-02 14:24:22,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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) [2024-12-02 14:24:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-12-02 14:24:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 14:24:22,801 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:22,801 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:22,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 14:24:22,801 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:22,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1886502109, now seen corresponding path program 1 times [2024-12-02 14:24:22,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:22,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416508606] [2024-12-02 14:24:22,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416508606] [2024-12-02 14:24:22,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416508606] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:22,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:22,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:24:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632703003] [2024-12-02 14:24:22,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:22,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:22,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:22,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:22,843 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2024-12-02 14:24:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:22,877 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2024-12-02 14:24:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 [2024-12-02 14:24:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:22,878 INFO L225 Difference]: With dead ends: 61 [2024-12-02 14:24:22,878 INFO L226 Difference]: Without dead ends: 61 [2024-12-02 14:24:22,878 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 [2024-12-02 14:24:22,879 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:22,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 77 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-12-02 14:24:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2024-12-02 14:24:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 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) [2024-12-02 14:24:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-12-02 14:24:22,881 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 16 [2024-12-02 14:24:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:22,881 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-12-02 14:24:22,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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) [2024-12-02 14:24:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-12-02 14:24:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 14:24:22,882 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:22,882 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:22,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 14:24:22,882 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:22,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:22,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1886502108, now seen corresponding path program 1 times [2024-12-02 14:24:22,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:22,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118253488] [2024-12-02 14:24:22,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:22,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:22,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:22,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118253488] [2024-12-02 14:24:22,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118253488] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:22,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:22,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:22,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643471576] [2024-12-02 14:24:22,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:22,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:22,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:22,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:22,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:22,928 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-12-02 14:24:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:22,952 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-12-02 14:24:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 [2024-12-02 14:24:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:22,952 INFO L225 Difference]: With dead ends: 60 [2024-12-02 14:24:22,953 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 14:24:22,953 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:22,953 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 127 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 [2024-12-02 14:24:22,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 127 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:22,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 14:24:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-12-02 14:24:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 58 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) [2024-12-02 14:24:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-12-02 14:24:22,955 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 16 [2024-12-02 14:24:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:22,955 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-12-02 14:24:22,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-12-02 14:24:22,956 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-12-02 14:24:22,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 14:24:22,956 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:22,956 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:22,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 14:24:22,956 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:22,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1821659174, now seen corresponding path program 1 times [2024-12-02 14:24:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:22,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078956033] [2024-12-02 14:24:22,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078956033] [2024-12-02 14:24:23,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078956033] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:24:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258375096] [2024-12-02 14:24:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:23,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:23,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:23,014 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) 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) [2024-12-02 14:24:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,037 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-12-02 14:24:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:23,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) 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 [2024-12-02 14:24:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,038 INFO L225 Difference]: With dead ends: 60 [2024-12-02 14:24:23,038 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 14:24:23,038 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:23,038 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,038 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 14:24:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-12-02 14:24:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.391304347826087) 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) [2024-12-02 14:24:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-12-02 14:24:23,040 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 16 [2024-12-02 14:24:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,040 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-12-02 14:24:23,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) 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) [2024-12-02 14:24:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-12-02 14:24:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 14:24:23,041 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,041 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 14:24:23,041 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1622210693, now seen corresponding path program 1 times [2024-12-02 14:24:23,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339202943] [2024-12-02 14:24:23,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339202943] [2024-12-02 14:24:23,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339202943] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735641688] [2024-12-02 14:24:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:23,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:23,090 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,137 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2024-12-02 14:24:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-12-02 14:24:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,137 INFO L225 Difference]: With dead ends: 53 [2024-12-02 14:24:23,137 INFO L226 Difference]: Without dead ends: 53 [2024-12-02 14:24:23,138 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 [2024-12-02 14:24:23,138 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-12-02 14:24:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-12-02 14:24:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 52 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) [2024-12-02 14:24:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2024-12-02 14:24:23,139 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 17 [2024-12-02 14:24:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,139 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2024-12-02 14:24:23,140 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2024-12-02 14:24:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 14:24:23,140 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,140 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 14:24:23,140 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1622210694, now seen corresponding path program 1 times [2024-12-02 14:24:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102639045] [2024-12-02 14:24:23,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102639045] [2024-12-02 14:24:23,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102639045] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:24:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298852152] [2024-12-02 14:24:23,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,263 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:23,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:24:23,263 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,343 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2024-12-02 14:24:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-12-02 14:24:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,344 INFO L225 Difference]: With dead ends: 79 [2024-12-02 14:24:23,344 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 14:24:23,344 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 [2024-12-02 14:24:23,344 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 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 [2024-12-02 14:24:23,345 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 14:24:23,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2024-12-02 14:24:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.36) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-12-02 14:24:23,347 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 17 [2024-12-02 14:24:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,347 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-12-02 14:24:23,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-12-02 14:24:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:24:23,348 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,348 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 14:24:23,348 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1251076023, now seen corresponding path program 1 times [2024-12-02 14:24:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612941557] [2024-12-02 14:24:23,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612941557] [2024-12-02 14:24:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612941557] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995402034] [2024-12-02 14:24:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:23,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:23,402 INFO L87 Difference]: Start difference. First operand 57 states and 68 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) [2024-12-02 14:24:23,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,447 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2024-12-02 14:24:23,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:23,447 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 [2024-12-02 14:24:23,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,448 INFO L225 Difference]: With dead ends: 63 [2024-12-02 14:24:23,448 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 14:24:23,448 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 [2024-12-02 14:24:23,448 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 100 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 14:24:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2024-12-02 14:24:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.34) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-12-02 14:24:23,451 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 18 [2024-12-02 14:24:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,451 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-12-02 14:24:23,451 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) [2024-12-02 14:24:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-12-02 14:24:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 14:24:23,452 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,452 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 14:24:23,452 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1251076022, now seen corresponding path program 1 times [2024-12-02 14:24:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318617367] [2024-12-02 14:24:23,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318617367] [2024-12-02 14:24:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318617367] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:24:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281711070] [2024-12-02 14:24:23,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,562 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:23,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:24:23,562 INFO L87 Difference]: Start difference. First operand 56 states and 67 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) [2024-12-02 14:24:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,636 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-12-02 14:24:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:24:23,637 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 [2024-12-02 14:24:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,638 INFO L225 Difference]: With dead ends: 72 [2024-12-02 14:24:23,638 INFO L226 Difference]: Without dead ends: 72 [2024-12-02 14:24:23,638 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 [2024-12-02 14:24:23,639 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 27 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 173 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-12-02 14:24:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2024-12-02 14:24:23,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-12-02 14:24:23,642 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 18 [2024-12-02 14:24:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,642 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-12-02 14:24:23,642 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) [2024-12-02 14:24:23,643 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-12-02 14:24:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 14:24:23,643 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,643 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-12-02 14:24:23,643 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -125386935, now seen corresponding path program 1 times [2024-12-02 14:24:23,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289459792] [2024-12-02 14:24:23,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289459792] [2024-12-02 14:24:23,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289459792] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:24:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543638157] [2024-12-02 14:24:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:23,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:23,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:23,738 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,761 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-12-02 14:24:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-12-02 14:24:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,765 INFO L225 Difference]: With dead ends: 59 [2024-12-02 14:24:23,765 INFO L226 Difference]: Without dead ends: 56 [2024-12-02 14:24:23,765 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 [2024-12-02 14:24:23,767 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 70 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 [2024-12-02 14:24:23,767 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 70 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-12-02 14:24:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-12-02 14:24:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-12-02 14:24:23,769 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 19 [2024-12-02 14:24:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,769 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-12-02 14:24:23,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-12-02 14:24:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 14:24:23,770 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,770 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 14:24:23,770 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,770 INFO L85 PathProgramCache]: Analyzing trace with hash -126181297, now seen corresponding path program 1 times [2024-12-02 14:24:23,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072090168] [2024-12-02 14:24:23,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072090168] [2024-12-02 14:24:23,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072090168] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409133732] [2024-12-02 14:24:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:23,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:23,821 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,856 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-12-02 14:24:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-12-02 14:24:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,857 INFO L225 Difference]: With dead ends: 55 [2024-12-02 14:24:23,857 INFO L226 Difference]: Without dead ends: 55 [2024-12-02 14:24:23,857 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 [2024-12-02 14:24:23,857 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-12-02 14:24:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-12-02 14:24:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-12-02 14:24:23,860 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 19 [2024-12-02 14:24:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,860 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-12-02 14:24:23,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-12-02 14:24:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 14:24:23,860 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,860 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-12-02 14:24:23,861 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,861 INFO L85 PathProgramCache]: Analyzing trace with hash -126181296, now seen corresponding path program 1 times [2024-12-02 14:24:23,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679518105] [2024-12-02 14:24:23,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:23,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:23,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679518105] [2024-12-02 14:24:23,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679518105] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:23,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:23,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:24:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478237472] [2024-12-02 14:24:23,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:23,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:23,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:23,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:23,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:24:23,921 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:23,938 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2024-12-02 14:24:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:23,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-12-02 14:24:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:23,939 INFO L225 Difference]: With dead ends: 77 [2024-12-02 14:24:23,939 INFO L226 Difference]: Without dead ends: 77 [2024-12-02 14:24:23,939 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 [2024-12-02 14:24:23,940 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:23,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-02 14:24:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-12-02 14:24:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 74 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) [2024-12-02 14:24:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2024-12-02 14:24:23,943 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 19 [2024-12-02 14:24:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:23,943 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2024-12-02 14:24:23,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:23,943 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2024-12-02 14:24:23,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 14:24:23,943 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:23,943 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:23,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 14:24:23,943 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:23,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:23,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1147249650, now seen corresponding path program 1 times [2024-12-02 14:24:23,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:23,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340792765] [2024-12-02 14:24:23,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340792765] [2024-12-02 14:24:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340792765] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:24:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093800025] [2024-12-02 14:24:24,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:24:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:24:24,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:24:24,034 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,059 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2024-12-02 14:24:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 14:24:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2024-12-02 14:24:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,060 INFO L225 Difference]: With dead ends: 75 [2024-12-02 14:24:24,060 INFO L226 Difference]: Without dead ends: 75 [2024-12-02 14:24:24,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 14:24:24,061 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:24,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 101 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-12-02 14:24:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2024-12-02 14:24:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 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) [2024-12-02 14:24:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-12-02 14:24:24,063 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 19 [2024-12-02 14:24:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,063 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-12-02 14:24:24,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-12-02 14:24:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 14:24:24,064 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,064 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] [2024-12-02 14:24:24,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-12-02 14:24:24,064 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 383190491, now seen corresponding path program 1 times [2024-12-02 14:24:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365710029] [2024-12-02 14:24:24,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365710029] [2024-12-02 14:24:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365710029] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 14:24:24,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252772131] [2024-12-02 14:24:24,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:24,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:24,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:24:24,207 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2024-12-02 14:24:24,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,283 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-12-02 14:24:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:24,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 [2024-12-02 14:24:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,284 INFO L225 Difference]: With dead ends: 73 [2024-12-02 14:24:24,284 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 14:24:24,284 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 [2024-12-02 14:24:24,284 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:24,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 135 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:24,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 14:24:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2024-12-02 14:24:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2024-12-02 14:24:24,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 20 [2024-12-02 14:24:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,287 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2024-12-02 14:24:24,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2024-12-02 14:24:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2024-12-02 14:24:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 14:24:24,287 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,287 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] [2024-12-02 14:24:24,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 14:24:24,288 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1530991722, now seen corresponding path program 1 times [2024-12-02 14:24:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793501585] [2024-12-02 14:24:24,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793501585] [2024-12-02 14:24:24,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793501585] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 14:24:24,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530030849] [2024-12-02 14:24:24,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 14:24:24,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 14:24:24,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 14:24:24,344 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,369 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-12-02 14:24:24,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 14:24:24,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2024-12-02 14:24:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,370 INFO L225 Difference]: With dead ends: 64 [2024-12-02 14:24:24,370 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 14:24:24,370 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 [2024-12-02 14:24:24,370 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:24,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:24,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 14:24:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-12-02 14:24:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 63 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-12-02 14:24:24,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 22 [2024-12-02 14:24:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,373 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-12-02 14:24:24,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-12-02 14:24:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 14:24:24,374 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,374 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] [2024-12-02 14:24:24,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-12-02 14:24:24,374 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1075031832, now seen corresponding path program 1 times [2024-12-02 14:24:24,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267997751] [2024-12-02 14:24:24,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267997751] [2024-12-02 14:24:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267997751] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 14:24:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046568342] [2024-12-02 14:24:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,453 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:24,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:24:24,453 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,498 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-12-02 14:24:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2024-12-02 14:24:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,499 INFO L225 Difference]: With dead ends: 75 [2024-12-02 14:24:24,499 INFO L226 Difference]: Without dead ends: 75 [2024-12-02 14:24:24,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-12-02 14:24:24,500 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 126 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 [2024-12-02 14:24:24,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-12-02 14:24:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2024-12-02 14:24:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2024-12-02 14:24:24,502 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2024-12-02 14:24:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,502 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2024-12-02 14:24:24,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,503 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2024-12-02 14:24:24,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 14:24:24,503 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,503 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:24,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-12-02 14:24:24,503 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash -395105928, now seen corresponding path program 1 times [2024-12-02 14:24:24,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045241725] [2024-12-02 14:24:24,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045241725] [2024-12-02 14:24:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045241725] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 14:24:24,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88807618] [2024-12-02 14:24:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 14:24:24,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 14:24:24,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 14:24:24,616 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,654 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2024-12-02 14:24:24,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-12-02 14:24:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,655 INFO L225 Difference]: With dead ends: 94 [2024-12-02 14:24:24,655 INFO L226 Difference]: Without dead ends: 77 [2024-12-02 14:24:24,655 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 [2024-12-02 14:24:24,655 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:24,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-02 14:24:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-12-02 14:24:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 75 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) [2024-12-02 14:24:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2024-12-02 14:24:24,658 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 23 [2024-12-02 14:24:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,658 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2024-12-02 14:24:24,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2024-12-02 14:24:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 14:24:24,659 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,659 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:24,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 14:24:24,659 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 27595898, now seen corresponding path program 1 times [2024-12-02 14:24:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452037417] [2024-12-02 14:24:24,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:24,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:24,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452037417] [2024-12-02 14:24:24,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452037417] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:24,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:24:24,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 14:24:24,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638439451] [2024-12-02 14:24:24,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:24,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:24:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:24,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:24:24,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:24:24,796 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:24,855 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2024-12-02 14:24:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:24:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-12-02 14:24:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:24,856 INFO L225 Difference]: With dead ends: 113 [2024-12-02 14:24:24,856 INFO L226 Difference]: Without dead ends: 98 [2024-12-02 14:24:24,856 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:24:24,857 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:24,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-12-02 14:24:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2024-12-02 14:24:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 77 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) [2024-12-02 14:24:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2024-12-02 14:24:24,860 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2024-12-02 14:24:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:24,860 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2024-12-02 14:24:24,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2024-12-02 14:24:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 14:24:24,860 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:24,860 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, 1] [2024-12-02 14:24:24,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-12-02 14:24:24,861 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:24,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2137119185, now seen corresponding path program 1 times [2024-12-02 14:24:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:24,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555760261] [2024-12-02 14:24:24,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555760261] [2024-12-02 14:24:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555760261] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203239603] [2024-12-02 14:24:25,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:25,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:25,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:25,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 14:24:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:25,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 14:24:25,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:25,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203239603] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:25,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:24:25,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 5] total 14 [2024-12-02 14:24:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317233317] [2024-12-02 14:24:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:25,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:24:25,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:25,208 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:24:25,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:24:25,208 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:25,218 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2024-12-02 14:24:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:24:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2024-12-02 14:24:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:25,219 INFO L225 Difference]: With dead ends: 79 [2024-12-02 14:24:25,219 INFO L226 Difference]: Without dead ends: 78 [2024-12-02 14:24:25,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:24:25,220 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:25,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 66 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-12-02 14:24:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-12-02 14:24:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 77 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) [2024-12-02 14:24:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2024-12-02 14:24:25,223 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 26 [2024-12-02 14:24:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:25,223 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2024-12-02 14:24:25,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2024-12-02 14:24:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:24:25,223 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:25,223 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] [2024-12-02 14:24:25,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 14:24:25,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-12-02 14:24:25,424 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:25,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1827201302, now seen corresponding path program 1 times [2024-12-02 14:24:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302865629] [2024-12-02 14:24:25,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302865629] [2024-12-02 14:24:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302865629] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374570006] [2024-12-02 14:24:25,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:25,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:25,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 14:24:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:25,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 14:24:25,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:25,672 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 [2024-12-02 14:24:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:25,727 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 14:24:25,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374570006] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:25,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 14:24:25,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-12-02 14:24:25,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863509059] [2024-12-02 14:24:25,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:25,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:24:25,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:25,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:24:25,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:24:25,729 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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) [2024-12-02 14:24:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:25,773 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-12-02 14:24:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:24:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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 [2024-12-02 14:24:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:25,774 INFO L225 Difference]: With dead ends: 95 [2024-12-02 14:24:25,774 INFO L226 Difference]: Without dead ends: 75 [2024-12-02 14:24:25,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:24:25,775 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:25,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-12-02 14:24:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-12-02 14:24:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-12-02 14:24:25,780 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2024-12-02 14:24:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:25,780 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-12-02 14:24:25,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 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) [2024-12-02 14:24:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-12-02 14:24:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:24:25,781 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:25,781 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-12-02 14:24:25,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 14:24:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:25,981 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:25,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1961718177, now seen corresponding path program 1 times [2024-12-02 14:24:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893723771] [2024-12-02 14:24:25,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:26,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893723771] [2024-12-02 14:24:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893723771] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452945784] [2024-12-02 14:24:26,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:26,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:26,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 14:24:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:26,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 14:24:26,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:26,357 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 [2024-12-02 14:24:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:26,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452945784] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:26,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:26,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-12-02 14:24:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081194978] [2024-12-02 14:24:26,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:26,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 14:24:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:26,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 14:24:26,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:24:26,686 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 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) [2024-12-02 14:24:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:26,944 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-12-02 14:24:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 14:24:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 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) Word has length 27 [2024-12-02 14:24:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:26,945 INFO L225 Difference]: With dead ends: 95 [2024-12-02 14:24:26,945 INFO L226 Difference]: Without dead ends: 95 [2024-12-02 14:24:26,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-12-02 14:24:26,945 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 44 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:26,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 367 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-12-02 14:24:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2024-12-02 14:24:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.180722891566265) internal successors, (98), 86 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) [2024-12-02 14:24:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2024-12-02 14:24:26,948 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 27 [2024-12-02 14:24:26,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:26,948 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2024-12-02 14:24:26,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 22 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) [2024-12-02 14:24:26,949 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2024-12-02 14:24:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 14:24:26,949 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:26,949 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] [2024-12-02 14:24:26,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 14:24:27,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:27,150 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:27,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1967749912, now seen corresponding path program 1 times [2024-12-02 14:24:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:27,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763691141] [2024-12-02 14:24:27,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:27,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:27,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:27,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763691141] [2024-12-02 14:24:27,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763691141] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:27,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501473807] [2024-12-02 14:24:27,283 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:27,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:27,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:27,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:27,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 14:24:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:27,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 14:24:27,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:27,439 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 14 treesize of output 10 [2024-12-02 14:24:27,598 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 14:24:27,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:24:27,600 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 18 treesize of output 10 [2024-12-02 14:24:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:27,619 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 14:24:27,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501473807] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:27,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 14:24:27,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-12-02 14:24:27,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354610166] [2024-12-02 14:24:27,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:27,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 14:24:27,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:27,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 14:24:27,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:24:27,621 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2024-12-02 14:24:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:27,703 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2024-12-02 14:24:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:24:27,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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 [2024-12-02 14:24:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:27,704 INFO L225 Difference]: With dead ends: 94 [2024-12-02 14:24:27,704 INFO L226 Difference]: Without dead ends: 77 [2024-12-02 14:24:27,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:24:27,705 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:27,705 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 228 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-02 14:24:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2024-12-02 14:24:27,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 70 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) [2024-12-02 14:24:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-12-02 14:24:27,708 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 27 [2024-12-02 14:24:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:27,708 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-12-02 14:24:27,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 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) [2024-12-02 14:24:27,708 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-12-02 14:24:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 14:24:27,708 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:27,708 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-12-02 14:24:27,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 14:24:27,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:27,909 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:27,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash -73736206, now seen corresponding path program 2 times [2024-12-02 14:24:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:27,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758830818] [2024-12-02 14:24:27,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:27,932 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:27,932 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758830818] [2024-12-02 14:24:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758830818] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674418649] [2024-12-02 14:24:28,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:28,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:28,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:28,287 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:28,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 14:24:28,396 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:28,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:28,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 14:24:28,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:28,466 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 [2024-12-02 14:24:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:28,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:28,540 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 [2024-12-02 14:24:28,542 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 [2024-12-02 14:24:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:28,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674418649] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:28,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:28,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2024-12-02 14:24:28,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965698125] [2024-12-02 14:24:28,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:28,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 14:24:28,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:28,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 14:24:28,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:24:28,602 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2024-12-02 14:24:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:28,721 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2024-12-02 14:24:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:24:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 30 [2024-12-02 14:24:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:28,722 INFO L225 Difference]: With dead ends: 127 [2024-12-02 14:24:28,722 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 14:24:28,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:24:28,723 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:28,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 373 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 14:24:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2024-12-02 14:24:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2024-12-02 14:24:28,726 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 30 [2024-12-02 14:24:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:28,726 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2024-12-02 14:24:28,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2024-12-02 14:24:28,726 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2024-12-02 14:24:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 14:24:28,727 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:28,727 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] [2024-12-02 14:24:28,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 14:24:28,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:28,927 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:28,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 249552319, now seen corresponding path program 1 times [2024-12-02 14:24:28,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:28,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587651862] [2024-12-02 14:24:28,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587651862] [2024-12-02 14:24:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587651862] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651125871] [2024-12-02 14:24:29,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:29,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:29,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:29,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:29,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 14:24:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:29,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 14:24:29,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:29,278 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 [2024-12-02 14:24:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:29,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651125871] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:29,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:29,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-12-02 14:24:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740462201] [2024-12-02 14:24:29,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:29,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 14:24:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:29,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 14:24:29,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:24:29,596 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:29,794 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2024-12-02 14:24:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 14:24:29,795 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-12-02 14:24:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:29,795 INFO L225 Difference]: With dead ends: 104 [2024-12-02 14:24:29,795 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 14:24:29,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-12-02 14:24:29,796 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:29,797 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 323 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 14:24:29,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2024-12-02 14:24:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2024-12-02 14:24:29,799 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 31 [2024-12-02 14:24:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:29,800 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2024-12-02 14:24:29,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2024-12-02 14:24:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-12-02 14:24:29,800 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:29,800 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] [2024-12-02 14:24:29,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 14:24:30,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-12-02 14:24:30,001 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:30,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash -853812687, now seen corresponding path program 1 times [2024-12-02 14:24:30,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:30,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422444726] [2024-12-02 14:24:30,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:30,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:30,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:30,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422444726] [2024-12-02 14:24:30,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422444726] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:30,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678558596] [2024-12-02 14:24:30,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:30,213 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:30,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 14:24:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:30,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 14:24:30,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:30,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:30,532 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 [2024-12-02 14:24:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:30,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678558596] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:30,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:30,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-12-02 14:24:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847722387] [2024-12-02 14:24:30,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:30,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 14:24:30,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:30,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 14:24:30,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-12-02 14:24:30,552 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 21 states, 20 states have (on average 3.45) 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) [2024-12-02 14:24:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:30,756 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-12-02 14:24:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 14:24:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.45) 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 32 [2024-12-02 14:24:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:30,757 INFO L225 Difference]: With dead ends: 113 [2024-12-02 14:24:30,757 INFO L226 Difference]: Without dead ends: 110 [2024-12-02 14:24:30,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-12-02 14:24:30,758 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:30,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 430 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-12-02 14:24:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-12-02 14:24:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-12-02 14:24:30,760 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2024-12-02 14:24:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:30,760 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-12-02 14:24:30,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.45) 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) [2024-12-02 14:24:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-12-02 14:24:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 14:24:30,761 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:30,761 INFO L218 NwaCegarLoop]: trace histogram [3, 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] [2024-12-02 14:24:30,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 14:24:30,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-12-02 14:24:30,961 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:30,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1743632619, now seen corresponding path program 3 times [2024-12-02 14:24:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:30,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717057834] [2024-12-02 14:24:30,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:30,979 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:24:30,980 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:31,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717057834] [2024-12-02 14:24:31,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717057834] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:31,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037805774] [2024-12-02 14:24:31,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:31,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:31,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:31,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:31,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 14:24:31,307 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:24:31,307 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:31,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 14:24:31,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:31,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:31,624 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 [2024-12-02 14:24:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:31,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037805774] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:31,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:31,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-12-02 14:24:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799051112] [2024-12-02 14:24:31,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:31,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 14:24:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:31,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 14:24:31,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2024-12-02 14:24:31,731 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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) [2024-12-02 14:24:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:31,976 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2024-12-02 14:24:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:24:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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 34 [2024-12-02 14:24:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:31,977 INFO L225 Difference]: With dead ends: 115 [2024-12-02 14:24:31,977 INFO L226 Difference]: Without dead ends: 115 [2024-12-02 14:24:31,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:24:31,978 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 51 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:31,978 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 401 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-12-02 14:24:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-12-02 14:24:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.146788990825688) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2024-12-02 14:24:31,981 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 34 [2024-12-02 14:24:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:31,981 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2024-12-02 14:24:31,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 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) [2024-12-02 14:24:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2024-12-02 14:24:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 14:24:31,982 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:31,982 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:31,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 14:24:32,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 14:24:32,183 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:32,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1224924264, now seen corresponding path program 4 times [2024-12-02 14:24:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624004744] [2024-12-02 14:24:32,183 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:32,199 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:32,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:32,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:32,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624004744] [2024-12-02 14:24:32,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624004744] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921454779] [2024-12-02 14:24:32,811 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:32,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:32,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:32,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 14:24:32,909 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:32,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:32,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-02 14:24:32,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:32,933 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 14 treesize of output 10 [2024-12-02 14:24:33,596 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2024-12-02 14:24:33,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2024-12-02 14:24:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:33,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:34,307 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 44 treesize of output 38 [2024-12-02 14:24:34,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-12-02 14:24:34,319 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 [2024-12-02 14:24:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:34,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921454779] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:34,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:34,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2024-12-02 14:24:34,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770330178] [2024-12-02 14:24:34,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:34,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 14:24:34,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:34,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 14:24:34,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 14:24:34,333 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 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) [2024-12-02 14:24:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:34,689 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2024-12-02 14:24:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 14:24:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 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 37 [2024-12-02 14:24:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:34,689 INFO L225 Difference]: With dead ends: 121 [2024-12-02 14:24:34,689 INFO L226 Difference]: Without dead ends: 88 [2024-12-02 14:24:34,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:24:34,690 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:34,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 321 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-12-02 14:24:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-12-02 14:24:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 87 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) [2024-12-02 14:24:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-12-02 14:24:34,692 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 37 [2024-12-02 14:24:34,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:34,692 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-12-02 14:24:34,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 37 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) [2024-12-02 14:24:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-12-02 14:24:34,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 14:24:34,693 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:34,693 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 14:24:34,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 14:24:34,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 14:24:34,894 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:34,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2128585110, now seen corresponding path program 2 times [2024-12-02 14:24:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647876838] [2024-12-02 14:24:34,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:34,915 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:34,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 14:24:35,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647876838] [2024-12-02 14:24:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647876838] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:35,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625574902] [2024-12-02 14:24:35,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:35,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:35,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:35,124 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:35,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 14:24:35,219 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:35,219 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:35,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 14:24:35,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:35,268 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 [2024-12-02 14:24:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:35,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:35,372 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 [2024-12-02 14:24:35,374 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 [2024-12-02 14:24:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:35,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625574902] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:35,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:35,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-12-02 14:24:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088579140] [2024-12-02 14:24:35,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:35,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 14:24:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:35,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 14:24:35,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:24:35,424 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 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) [2024-12-02 14:24:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:35,773 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2024-12-02 14:24:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-12-02 14:24:35,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 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) Word has length 37 [2024-12-02 14:24:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:35,773 INFO L225 Difference]: With dead ends: 132 [2024-12-02 14:24:35,773 INFO L226 Difference]: Without dead ends: 89 [2024-12-02 14:24:35,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 14:24:35,774 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:35,774 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 304 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-12-02 14:24:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2024-12-02 14:24:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.139240506329114) internal successors, (90), 82 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) [2024-12-02 14:24:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2024-12-02 14:24:35,776 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 37 [2024-12-02 14:24:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:35,776 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2024-12-02 14:24:35,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 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) [2024-12-02 14:24:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2024-12-02 14:24:35,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 14:24:35,776 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:35,776 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:35,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 14:24:35,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 14:24:35,977 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:35,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:35,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1454101595, now seen corresponding path program 1 times [2024-12-02 14:24:35,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:35,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896082975] [2024-12-02 14:24:35,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:35,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:24:36,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896082975] [2024-12-02 14:24:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896082975] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:36,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51445924] [2024-12-02 14:24:36,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:36,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:36,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:36,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:36,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 14:24:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:36,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-12-02 14:24:36,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:37,077 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 [2024-12-02 14:24:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:37,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:37,167 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 [2024-12-02 14:24:37,169 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 [2024-12-02 14:24:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:37,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51445924] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:37,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:37,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 28 [2024-12-02 14:24:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364088075] [2024-12-02 14:24:37,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:37,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 14:24:37,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:37,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 14:24:37,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-12-02 14:24:37,251 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:37,892 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2024-12-02 14:24:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 14:24:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-12-02 14:24:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:37,893 INFO L225 Difference]: With dead ends: 149 [2024-12-02 14:24:37,893 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 14:24:37,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 14:24:37,893 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:37,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 658 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:24:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 14:24:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2024-12-02 14:24:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 118 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2024-12-02 14:24:37,897 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 44 [2024-12-02 14:24:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:37,897 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2024-12-02 14:24:37,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2024-12-02 14:24:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 14:24:37,897 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:37,897 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2024-12-02 14:24:37,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 14:24:38,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:38,098 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:38,098 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash -484930568, now seen corresponding path program 3 times [2024-12-02 14:24:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:38,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202542254] [2024-12-02 14:24:38,098 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:38,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:38,116 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:24:38,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:38,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202542254] [2024-12-02 14:24:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202542254] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024024542] [2024-12-02 14:24:38,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:38,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:38,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:38,360 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:38,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 14:24:38,460 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 14:24:38,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:38,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 14:24:38,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:38,469 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 [2024-12-02 14:24:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:38,580 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:38,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024024542] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:38,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:38,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-12-02 14:24:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695499791] [2024-12-02 14:24:38,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:38,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 14:24:38,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:38,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 14:24:38,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:24:38,836 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:39,100 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2024-12-02 14:24:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 14:24:39,100 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 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 45 [2024-12-02 14:24:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:39,101 INFO L225 Difference]: With dead ends: 122 [2024-12-02 14:24:39,101 INFO L226 Difference]: Without dead ends: 122 [2024-12-02 14:24:39,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2024-12-02 14:24:39,101 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:39,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 357 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-12-02 14:24:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-12-02 14:24:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2024-12-02 14:24:39,103 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 45 [2024-12-02 14:24:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:39,103 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2024-12-02 14:24:39,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:39,104 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2024-12-02 14:24:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 14:24:39,104 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:39,104 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:39,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 14:24:39,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:39,304 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:39,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:39,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2147021592, now seen corresponding path program 2 times [2024-12-02 14:24:39,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:39,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888396272] [2024-12-02 14:24:39,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:39,318 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:39,318 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:39,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:39,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888396272] [2024-12-02 14:24:39,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888396272] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:39,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109685006] [2024-12-02 14:24:39,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:39,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:39,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:39,437 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:39,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 14:24:39,548 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:39,548 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:39,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 14:24:39,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:39,717 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:39,906 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 [2024-12-02 14:24:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:24:39,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109685006] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:39,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:39,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-12-02 14:24:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031065857] [2024-12-02 14:24:39,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:39,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 14:24:39,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:39,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 14:24:39,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2024-12-02 14:24:39,943 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:40,384 INFO L93 Difference]: Finished difference Result 178 states and 188 transitions. [2024-12-02 14:24:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 14:24:40,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2024-12-02 14:24:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:40,385 INFO L225 Difference]: With dead ends: 178 [2024-12-02 14:24:40,385 INFO L226 Difference]: Without dead ends: 155 [2024-12-02 14:24:40,385 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:24:40,386 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:40,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 539 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-12-02 14:24:40,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2024-12-02 14:24:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.091549295774648) internal successors, (155), 145 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:40,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 155 transitions. [2024-12-02 14:24:40,388 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 155 transitions. Word has length 46 [2024-12-02 14:24:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:40,388 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 155 transitions. [2024-12-02 14:24:40,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 155 transitions. [2024-12-02 14:24:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-12-02 14:24:40,389 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:40,389 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-12-02 14:24:40,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 14:24:40,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-12-02 14:24:40,589 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:40,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1871721620, now seen corresponding path program 2 times [2024-12-02 14:24:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:40,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153000759] [2024-12-02 14:24:40,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:40,607 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:40,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153000759] [2024-12-02 14:24:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153000759] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916942102] [2024-12-02 14:24:40,972 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:40,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:40,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:40,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 14:24:41,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:41,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:41,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-12-02 14:24:41,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:41,102 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 [2024-12-02 14:24:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:41,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916942102] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:41,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-12-02 14:24:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203093059] [2024-12-02 14:24:41,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:41,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-12-02 14:24:41,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:41,598 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-12-02 14:24:41,598 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2024-12-02 14:24:41,599 INFO L87 Difference]: Start difference. First operand 146 states and 155 transitions. Second operand has 31 states, 30 states have (on average 4.033333333333333) internal successors, (121), 31 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) [2024-12-02 14:24:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:41,985 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2024-12-02 14:24:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 14:24:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.033333333333333) internal successors, (121), 31 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) Word has length 48 [2024-12-02 14:24:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:41,986 INFO L225 Difference]: With dead ends: 160 [2024-12-02 14:24:41,986 INFO L226 Difference]: Without dead ends: 160 [2024-12-02 14:24:41,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 14:24:41,987 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:41,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 659 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:24:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-12-02 14:24:41,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2024-12-02 14:24:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0974025974025974) internal successors, (169), 157 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2024-12-02 14:24:41,989 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 48 [2024-12-02 14:24:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:41,989 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2024-12-02 14:24:41,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.033333333333333) internal successors, (121), 31 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) [2024-12-02 14:24:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2024-12-02 14:24:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 14:24:41,989 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:41,989 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2024-12-02 14:24:41,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 14:24:42,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-12-02 14:24:42,190 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:42,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1101573089, now seen corresponding path program 3 times [2024-12-02 14:24:42,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:42,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792675534] [2024-12-02 14:24:42,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:42,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:42,213 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 14:24:42,213 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:42,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:42,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792675534] [2024-12-02 14:24:42,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792675534] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:42,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357297595] [2024-12-02 14:24:42,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:42,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:42,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:42,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:42,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 14:24:42,677 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 14:24:42,677 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:42,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-12-02 14:24:42,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:42,800 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 [2024-12-02 14:24:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:42,860 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:42,890 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 15 treesize of output 13 [2024-12-02 14:24:42,892 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 [2024-12-02 14:24:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:42,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357297595] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:42,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:42,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 27 [2024-12-02 14:24:42,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215008763] [2024-12-02 14:24:42,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:42,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-12-02 14:24:42,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:42,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-12-02 14:24:42,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:24:42,954 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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) [2024-12-02 14:24:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:43,212 INFO L93 Difference]: Finished difference Result 256 states and 273 transitions. [2024-12-02 14:24:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 14:24:43,213 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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) Word has length 51 [2024-12-02 14:24:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:43,213 INFO L225 Difference]: With dead ends: 256 [2024-12-02 14:24:43,213 INFO L226 Difference]: Without dead ends: 209 [2024-12-02 14:24:43,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2024-12-02 14:24:43,214 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 32 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:43,214 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 855 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-12-02 14:24:43,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2024-12-02 14:24:43,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.09) internal successors, (218), 203 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2024-12-02 14:24:43,217 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 51 [2024-12-02 14:24:43,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:43,217 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2024-12-02 14:24:43,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 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) [2024-12-02 14:24:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2024-12-02 14:24:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-12-02 14:24:43,218 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:43,218 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2024-12-02 14:24:43,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-12-02 14:24:43,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-12-02 14:24:43,419 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:43,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash 787083718, now seen corresponding path program 4 times [2024-12-02 14:24:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642171143] [2024-12-02 14:24:43,419 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:43,442 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:43,442 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-12-02 14:24:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642171143] [2024-12-02 14:24:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642171143] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:44,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998648858] [2024-12-02 14:24:44,258 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:44,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:44,260 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:44,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 14:24:44,374 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:44,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:44,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-12-02 14:24:44,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:44,456 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 14 treesize of output 10 [2024-12-02 14:24:45,864 INFO L349 Elim1Store]: treesize reduction 12, result has 72.7 percent of original size [2024-12-02 14:24:45,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 50 [2024-12-02 14:24:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 14:24:45,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:46,824 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 59 treesize of output 51 [2024-12-02 14:24:46,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2024-12-02 14:24:46,837 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 [2024-12-02 14:24:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 14:24:46,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998648858] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:46,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:46,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 49 [2024-12-02 14:24:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882398951] [2024-12-02 14:24:46,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:46,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-12-02 14:24:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:46,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-12-02 14:24:46,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2176, Unknown=1, NotChecked=0, Total=2450 [2024-12-02 14:24:46,951 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:47,550 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2024-12-02 14:24:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 14:24:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-12-02 14:24:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:47,551 INFO L225 Difference]: With dead ends: 218 [2024-12-02 14:24:47,551 INFO L226 Difference]: Without dead ends: 154 [2024-12-02 14:24:47,551 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=329, Invalid=2426, Unknown=1, NotChecked=0, Total=2756 [2024-12-02 14:24:47,552 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:47,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 415 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:24:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-12-02 14:24:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 62. [2024-12-02 14:24:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 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) [2024-12-02 14:24:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-12-02 14:24:47,553 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2024-12-02 14:24:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:47,553 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-12-02 14:24:47,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.061224489795918) internal successors, (101), 50 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-12-02 14:24:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-12-02 14:24:47,554 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:47,554 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:47,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 14:24:47,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 14:24:47,755 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:47,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -322484022, now seen corresponding path program 4 times [2024-12-02 14:24:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186775213] [2024-12-02 14:24:47,755 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:47,780 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:47,780 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186775213] [2024-12-02 14:24:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186775213] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950515251] [2024-12-02 14:24:48,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:48,360 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:48,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 14:24:48,493 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:48,493 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:48,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-02 14:24:48,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:48,564 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 14 treesize of output 10 [2024-12-02 14:24:49,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:24:49,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 122 [2024-12-02 14:24:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 14:24:49,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:50,572 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 38 [2024-12-02 14:24:50,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-12-02 14:24:50,584 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 [2024-12-02 14:24:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-12-02 14:24:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950515251] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:50,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2024-12-02 14:24:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316480938] [2024-12-02 14:24:50,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:50,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 14:24:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:50,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 14:24:50,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:24:50,648 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:51,086 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2024-12-02 14:24:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 14:24:51,086 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 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 55 [2024-12-02 14:24:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:51,086 INFO L225 Difference]: With dead ends: 61 [2024-12-02 14:24:51,086 INFO L226 Difference]: Without dead ends: 61 [2024-12-02 14:24:51,087 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 14:24:51,087 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:51,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 423 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:24:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-12-02 14:24:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-12-02 14:24:51,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 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) [2024-12-02 14:24:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2024-12-02 14:24:51,088 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2024-12-02 14:24:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:51,088 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2024-12-02 14:24:51,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2024-12-02 14:24:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-12-02 14:24:51,089 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:51,089 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:51,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 14:24:51,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:51,289 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:51,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:51,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1407070074, now seen corresponding path program 3 times [2024-12-02 14:24:51,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353504768] [2024-12-02 14:24:51,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:51,308 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 14:24:51,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:51,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353504768] [2024-12-02 14:24:51,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353504768] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:51,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004918950] [2024-12-02 14:24:51,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:24:51,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:51,625 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:51,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 14:24:51,800 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 14:24:51,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:51,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-12-02 14:24:51,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:52,014 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 [2024-12-02 14:24:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:24:52,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:52,278 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 [2024-12-02 14:24:52,279 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 [2024-12-02 14:24:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:52,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004918950] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:52,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:52,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 13] total 39 [2024-12-02 14:24:52,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853602249] [2024-12-02 14:24:52,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:52,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 14:24:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:52,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 14:24:52,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 14:24:52,380 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:52,897 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2024-12-02 14:24:52,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 14:24:52,897 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-12-02 14:24:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:52,898 INFO L225 Difference]: With dead ends: 105 [2024-12-02 14:24:52,898 INFO L226 Difference]: Without dead ends: 68 [2024-12-02 14:24:52,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2024-12-02 14:24:52,899 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:52,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 549 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:52,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-12-02 14:24:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2024-12-02 14:24:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2024-12-02 14:24:52,900 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2024-12-02 14:24:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:52,900 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2024-12-02 14:24:52,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2024-12-02 14:24:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-12-02 14:24:52,901 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:52,901 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:52,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 14:24:53,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:53,102 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:53,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash -861756609, now seen corresponding path program 4 times [2024-12-02 14:24:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:53,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615096331] [2024-12-02 14:24:53,102 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:53,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:53,114 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:53,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615096331] [2024-12-02 14:24:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615096331] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247357670] [2024-12-02 14:24:53,288 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:24:53,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:53,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:53,290 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:53,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 14:24:53,426 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:24:53,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:53,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-12-02 14:24:53,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:53,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:53,713 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 [2024-12-02 14:24:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247357670] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:53,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:53,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2024-12-02 14:24:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42981677] [2024-12-02 14:24:53,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:53,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 14:24:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:53,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 14:24:53,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-12-02 14:24:53,745 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 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) [2024-12-02 14:24:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:53,911 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2024-12-02 14:24:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 14:24:53,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 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) Word has length 60 [2024-12-02 14:24:53,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:53,912 INFO L225 Difference]: With dead ends: 74 [2024-12-02 14:24:53,912 INFO L226 Difference]: Without dead ends: 71 [2024-12-02 14:24:53,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-12-02 14:24:53,913 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:53,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 321 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 14:24:53,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-12-02 14:24:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-12-02 14:24:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-12-02 14:24:53,914 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 60 [2024-12-02 14:24:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:53,914 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-12-02 14:24:53,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 22 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) [2024-12-02 14:24:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-12-02 14:24:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-12-02 14:24:53,914 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:53,914 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:53,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 14:24:54,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:54,115 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:54,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash 252622196, now seen corresponding path program 5 times [2024-12-02 14:24:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:54,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983995069] [2024-12-02 14:24:54,115 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:24:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:54,139 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 14:24:54,139 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 14:24:54,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:54,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983995069] [2024-12-02 14:24:54,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983995069] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:54,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601878701] [2024-12-02 14:24:54,490 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:24:54,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:54,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:54,491 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:54,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 14:24:54,734 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 14:24:54,734 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:54,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-12-02 14:24:54,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:54,837 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 [2024-12-02 14:24:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:54,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:55,001 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 [2024-12-02 14:24:55,003 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 16 treesize of output 12 [2024-12-02 14:24:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:24:55,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601878701] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:55,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:55,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2024-12-02 14:24:55,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279048912] [2024-12-02 14:24:55,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:55,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 14:24:55,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:55,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 14:24:55,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2024-12-02 14:24:55,081 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:55,767 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2024-12-02 14:24:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 14:24:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 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 [2024-12-02 14:24:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:55,768 INFO L225 Difference]: With dead ends: 185 [2024-12-02 14:24:55,768 INFO L226 Difference]: Without dead ends: 85 [2024-12-02 14:24:55,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 14:24:55,769 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:55,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 583 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:24:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-12-02 14:24:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2024-12-02 14:24:55,770 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) [2024-12-02 14:24:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-12-02 14:24:55,770 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 66 [2024-12-02 14:24:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:55,770 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-12-02 14:24:55,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-12-02 14:24:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-12-02 14:24:55,771 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:55,771 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:55,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 14:24:55,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:55,971 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:55,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1050647206, now seen corresponding path program 6 times [2024-12-02 14:24:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:55,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866692326] [2024-12-02 14:24:55,972 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:24:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:56,014 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 14:24:56,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:56,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866692326] [2024-12-02 14:24:56,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866692326] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:56,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563149589] [2024-12-02 14:24:56,215 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:24:56,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:56,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:56,216 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:56,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 14:24:56,478 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 14:24:56,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:24:56,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 14:24:56,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:56,487 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 [2024-12-02 14:24:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:56,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:57,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563149589] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:57,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:57,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2024-12-02 14:24:57,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832657136] [2024-12-02 14:24:57,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:57,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 14:24:57,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:57,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 14:24:57,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 14:24:57,193 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:57,986 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2024-12-02 14:24:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-12-02 14:24:57,986 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 states have internal predecessors, (166), 0 states have call successors, (0), 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 74 [2024-12-02 14:24:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:57,987 INFO L225 Difference]: With dead ends: 126 [2024-12-02 14:24:57,987 INFO L226 Difference]: Without dead ends: 92 [2024-12-02 14:24:57,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=456, Invalid=3966, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 14:24:57,988 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 50 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:57,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 534 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:24:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-12-02 14:24:57,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2024-12-02 14:24:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 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) [2024-12-02 14:24:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2024-12-02 14:24:57,990 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 74 [2024-12-02 14:24:57,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:57,990 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2024-12-02 14:24:57,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.048780487804878) internal successors, (166), 41 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:57,990 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2024-12-02 14:24:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-12-02 14:24:57,990 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:57,990 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:58,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 14:24:58,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:58,191 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:58,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1349741036, now seen corresponding path program 7 times [2024-12-02 14:24:58,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:58,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135048061] [2024-12-02 14:24:58,191 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:24:58,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:58,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135048061] [2024-12-02 14:24:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135048061] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080598841] [2024-12-02 14:24:58,593 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:24:58,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:58,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:58,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 14:24:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:58,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-12-02 14:24:58,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:58,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:24:59,216 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 [2024-12-02 14:24:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-12-02 14:24:59,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080598841] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:24:59,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:24:59,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 35 [2024-12-02 14:24:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29566903] [2024-12-02 14:24:59,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:24:59,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 14:24:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:59,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 14:24:59,294 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 14:24:59,294 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:59,623 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2024-12-02 14:24:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 14:24:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 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 84 [2024-12-02 14:24:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:59,623 INFO L225 Difference]: With dead ends: 98 [2024-12-02 14:24:59,623 INFO L226 Difference]: Without dead ends: 95 [2024-12-02 14:24:59,624 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 14:24:59,624 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:24:59,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 524 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:24:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-12-02 14:24:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-12-02 14:24:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 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) [2024-12-02 14:24:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2024-12-02 14:24:59,626 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2024-12-02 14:24:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:59,626 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2024-12-02 14:24:59,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.257142857142857) internal successors, (149), 36 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:24:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2024-12-02 14:24:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-12-02 14:24:59,627 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:59,627 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:59,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 14:24:59,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:59,827 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:24:59,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash 113931401, now seen corresponding path program 8 times [2024-12-02 14:24:59,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:59,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466661659] [2024-12-02 14:24:59,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:24:59,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:59,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:24:59,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 115 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-12-02 14:25:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466661659] [2024-12-02 14:25:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466661659] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112168555] [2024-12-02 14:25:00,184 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:25:00,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:00,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:00,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 14:25:00,357 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:25:00,357 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:00,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 14:25:00,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:00,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 14:25:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 14:25:00,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:00,758 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 [2024-12-02 14:25:00,759 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 [2024-12-02 14:25:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 55 proven. 88 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-12-02 14:25:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112168555] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:00,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:00,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2024-12-02 14:25:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449640500] [2024-12-02 14:25:00,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:00,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 14:25:00,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:00,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 14:25:00,858 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1048, Unknown=0, NotChecked=0, Total=1122 [2024-12-02 14:25:00,858 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:01,749 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2024-12-02 14:25:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-12-02 14:25:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 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 90 [2024-12-02 14:25:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:01,749 INFO L225 Difference]: With dead ends: 245 [2024-12-02 14:25:01,749 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 14:25:01,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=3226, Unknown=0, NotChecked=0, Total=3422 [2024-12-02 14:25:01,750 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:01,750 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 956 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:25:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 14:25:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-12-02 14:25:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2024-12-02 14:25:01,752 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 90 [2024-12-02 14:25:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:01,752 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2024-12-02 14:25:01,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.117647058823529) internal successors, (140), 34 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:01,752 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2024-12-02 14:25:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-12-02 14:25:01,752 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:01,752 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:01,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 14:25:01,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:01,953 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:01,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1814117445, now seen corresponding path program 9 times [2024-12-02 14:25:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:01,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853536499] [2024-12-02 14:25:01,953 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:25:01,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:02,010 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 14:25:02,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 91 proven. 74 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 14:25:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853536499] [2024-12-02 14:25:02,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853536499] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:02,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73324617] [2024-12-02 14:25:02,789 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:25:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:02,790 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 14:25:03,712 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 14:25:03,712 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:03,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-12-02 14:25:03,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:03,722 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 [2024-12-02 14:25:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 14:25:04,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 141 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-12-02 14:25:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73324617] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:04,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 59 [2024-12-02 14:25:04,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611614682] [2024-12-02 14:25:04,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:04,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-12-02 14:25:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:04,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-12-02 14:25:04,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=3129, Unknown=0, NotChecked=0, Total=3422 [2024-12-02 14:25:04,734 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 59 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) [2024-12-02 14:25:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:06,515 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2024-12-02 14:25:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 14:25:06,516 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 59 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) Word has length 98 [2024-12-02 14:25:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:06,516 INFO L225 Difference]: With dead ends: 193 [2024-12-02 14:25:06,516 INFO L226 Difference]: Without dead ends: 116 [2024-12-02 14:25:06,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1144, Invalid=10846, Unknown=0, NotChecked=0, Total=11990 [2024-12-02 14:25:06,518 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:06,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 740 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:25:06,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-12-02 14:25:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2024-12-02 14:25:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2024-12-02 14:25:06,519 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 98 [2024-12-02 14:25:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:06,519 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2024-12-02 14:25:06,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.8983050847457625) internal successors, (230), 59 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) [2024-12-02 14:25:06,520 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2024-12-02 14:25:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-12-02 14:25:06,520 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:06,520 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:06,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 14:25:06,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:06,721 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:06,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1954765399, now seen corresponding path program 10 times [2024-12-02 14:25:06,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:06,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029748793] [2024-12-02 14:25:06,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:25:06,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:06,749 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:25:06,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 56 proven. 168 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-12-02 14:25:07,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:07,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029748793] [2024-12-02 14:25:07,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029748793] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:07,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754704682] [2024-12-02 14:25:07,055 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:25:07,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:07,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:07,057 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 14:25:07,639 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:25:07,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:07,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-12-02 14:25:07,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:07,837 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 [2024-12-02 14:25:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 35 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 14:25:08,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:08,158 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 [2024-12-02 14:25:08,159 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 [2024-12-02 14:25:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 35 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 14:25:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754704682] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:08,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:08,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 40 [2024-12-02 14:25:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255890014] [2024-12-02 14:25:08,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:08,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 14:25:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:08,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 14:25:08,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1474, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 14:25:08,269 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 40 states, 40 states have (on average 4.25) internal successors, (170), 40 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) [2024-12-02 14:25:09,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:09,590 INFO L93 Difference]: Finished difference Result 293 states and 296 transitions. [2024-12-02 14:25:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-12-02 14:25:09,591 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.25) internal successors, (170), 40 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) Word has length 108 [2024-12-02 14:25:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:09,591 INFO L225 Difference]: With dead ends: 293 [2024-12-02 14:25:09,591 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 14:25:09,592 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=4600, Unknown=0, NotChecked=0, Total=4830 [2024-12-02 14:25:09,592 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:09,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1451 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 14:25:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 14:25:09,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2024-12-02 14:25:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2024-12-02 14:25:09,594 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 108 [2024-12-02 14:25:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:09,594 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2024-12-02 14:25:09,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.25) internal successors, (170), 40 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) [2024-12-02 14:25:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2024-12-02 14:25:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-12-02 14:25:09,594 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:09,594 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:09,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 14:25:09,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:09,795 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:09,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 457772123, now seen corresponding path program 11 times [2024-12-02 14:25:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236619677] [2024-12-02 14:25:09,795 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:25:09,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:09,842 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 14:25:09,842 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-12-02 14:25:10,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236619677] [2024-12-02 14:25:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236619677] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:10,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63206921] [2024-12-02 14:25:10,505 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:25:10,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:10,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:10,507 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:10,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 14:25:12,446 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 14:25:12,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:12,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-12-02 14:25:12,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-12-02 14:25:12,857 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:13,195 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 [2024-12-02 14:25:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-12-02 14:25:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63206921] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:13,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 52 [2024-12-02 14:25:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588958196] [2024-12-02 14:25:13,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:13,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 14:25:13,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:13,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 14:25:13,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2383, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 14:25:13,521 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:14,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:14,099 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2024-12-02 14:25:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-12-02 14:25:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 116 [2024-12-02 14:25:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:14,100 INFO L225 Difference]: With dead ends: 130 [2024-12-02 14:25:14,100 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 14:25:14,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=471, Invalid=3311, Unknown=0, NotChecked=0, Total=3782 [2024-12-02 14:25:14,101 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 15 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:14,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 841 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:25:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 14:25:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-12-02 14:25:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2024-12-02 14:25:14,102 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 116 [2024-12-02 14:25:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:14,102 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2024-12-02 14:25:14,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.403846153846154) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2024-12-02 14:25:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-12-02 14:25:14,103 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:14,103 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:14,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 14:25:14,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-12-02 14:25:14,303 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:14,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2135893616, now seen corresponding path program 12 times [2024-12-02 14:25:14,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:14,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50994272] [2024-12-02 14:25:14,304 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:25:14,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:14,357 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-12-02 14:25:14,357 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 65 proven. 231 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-12-02 14:25:14,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50994272] [2024-12-02 14:25:14,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50994272] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:14,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179704502] [2024-12-02 14:25:14,897 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:25:14,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:14,899 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:14,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 14:25:18,730 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-12-02 14:25:18,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:18,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 159 conjuncts are in the unsatisfiable core [2024-12-02 14:25:18,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:19,463 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 [2024-12-02 14:25:20,062 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 [2024-12-02 14:25:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 40 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:25:20,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:20,537 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 [2024-12-02 14:25:20,539 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 [2024-12-02 14:25:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 40 proven. 284 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 14:25:21,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179704502] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:21,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:21,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 25] total 73 [2024-12-02 14:25:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486571410] [2024-12-02 14:25:21,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:21,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-12-02 14:25:21,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:21,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-12-02 14:25:21,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5010, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 14:25:21,068 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 73 states, 73 states have (on average 4.109589041095891) internal successors, (300), 73 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:23,441 INFO L93 Difference]: Finished difference Result 329 states and 332 transitions. [2024-12-02 14:25:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-12-02 14:25:23,442 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.109589041095891) internal successors, (300), 73 states have internal predecessors, (300), 0 states have call successors, (0), 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 122 [2024-12-02 14:25:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:23,442 INFO L225 Difference]: With dead ends: 329 [2024-12-02 14:25:23,442 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 14:25:23,443 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=415, Invalid=10505, Unknown=0, NotChecked=0, Total=10920 [2024-12-02 14:25:23,443 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 4320 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 4335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:23,443 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2506 Invalid, 4335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4320 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 14:25:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 14:25:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2024-12-02 14:25:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2024-12-02 14:25:23,445 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 122 [2024-12-02 14:25:23,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:23,445 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2024-12-02 14:25:23,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.109589041095891) internal successors, (300), 73 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2024-12-02 14:25:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-12-02 14:25:23,446 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:23,446 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:23,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 14:25:23,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-12-02 14:25:23,646 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:23,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 774242498, now seen corresponding path program 13 times [2024-12-02 14:25:23,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:23,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577108376] [2024-12-02 14:25:23,647 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:25:23,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:25:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 66 proven. 262 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 14:25:24,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:24,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577108376] [2024-12-02 14:25:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577108376] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:24,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317864420] [2024-12-02 14:25:24,333 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:25:24,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:24,335 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:24,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 14:25:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:25:24,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-12-02 14:25:24,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 91 proven. 237 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 14:25:24,912 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:25,333 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 [2024-12-02 14:25:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 91 proven. 237 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 14:25:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317864420] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:25,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 47 [2024-12-02 14:25:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463595233] [2024-12-02 14:25:25,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:25,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 14:25:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:25,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 14:25:25,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 14:25:25,487 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 48 states, 47 states have (on average 4.446808510638298) internal successors, (209), 48 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:26,116 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2024-12-02 14:25:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 14:25:26,116 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.446808510638298) internal successors, (209), 48 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-12-02 14:25:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:26,117 INFO L225 Difference]: With dead ends: 144 [2024-12-02 14:25:26,117 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 14:25:26,117 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=2952, Unknown=0, NotChecked=0, Total=3306 [2024-12-02 14:25:26,117 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 14 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:26,117 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1007 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:25:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 14:25:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2024-12-02 14:25:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2024-12-02 14:25:26,119 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 130 [2024-12-02 14:25:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:26,119 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2024-12-02 14:25:26,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.446808510638298) internal successors, (209), 48 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2024-12-02 14:25:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-12-02 14:25:26,120 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:26,120 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:26,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 14:25:26,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-12-02 14:25:26,320 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:26,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1213684553, now seen corresponding path program 14 times [2024-12-02 14:25:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:26,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476013366] [2024-12-02 14:25:26,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:25:26,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:26,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:25:26,355 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 74 proven. 304 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-12-02 14:25:26,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476013366] [2024-12-02 14:25:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476013366] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516641258] [2024-12-02 14:25:26,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:25:26,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:26,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:26,777 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:26,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 14:25:26,981 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:25:26,981 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:26,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-12-02 14:25:26,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:27,245 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 [2024-12-02 14:25:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 45 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 14:25:27,655 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:27,729 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 [2024-12-02 14:25:27,730 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 [2024-12-02 14:25:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 45 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-12-02 14:25:27,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516641258] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:27,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:27,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25, 25] total 48 [2024-12-02 14:25:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408000855] [2024-12-02 14:25:27,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:27,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 14:25:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:27,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 14:25:27,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2154, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 14:25:27,872 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:29,833 INFO L93 Difference]: Finished difference Result 365 states and 368 transitions. [2024-12-02 14:25:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-12-02 14:25:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 0 states have call successors, (0), 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 [2024-12-02 14:25:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:29,834 INFO L225 Difference]: With dead ends: 365 [2024-12-02 14:25:29,834 INFO L226 Difference]: Without dead ends: 155 [2024-12-02 14:25:29,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=282, Invalid=7028, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 14:25:29,835 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 31 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 3855 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:29,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2252 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 3855 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 14:25:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-12-02 14:25:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2024-12-02 14:25:29,837 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) [2024-12-02 14:25:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-12-02 14:25:29,838 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 136 [2024-12-02 14:25:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:29,838 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-12-02 14:25:29,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-12-02 14:25:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-12-02 14:25:29,838 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:29,839 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:29,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 14:25:30,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 14:25:30,039 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:30,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:30,039 INFO L85 PathProgramCache]: Analyzing trace with hash 628337769, now seen corresponding path program 15 times [2024-12-02 14:25:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:30,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156502669] [2024-12-02 14:25:30,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:25:30,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:30,126 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 14:25:30,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156502669] [2024-12-02 14:25:31,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156502669] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093105883] [2024-12-02 14:25:31,272 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:25:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:31,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:31,274 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:31,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 14:25:35,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 14:25:35,693 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:35,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-12-02 14:25:35,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:36,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:36,610 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 [2024-12-02 14:25:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:36,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093105883] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:36,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:36,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 54 [2024-12-02 14:25:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176829756] [2024-12-02 14:25:36,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:36,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-12-02 14:25:36,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:36,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-12-02 14:25:36,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2561, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 14:25:36,804 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:37,543 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2024-12-02 14:25:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 14:25:37,543 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 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 144 [2024-12-02 14:25:37,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:37,544 INFO L225 Difference]: With dead ends: 158 [2024-12-02 14:25:37,544 INFO L226 Difference]: Without dead ends: 155 [2024-12-02 14:25:37,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 251 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=807, Invalid=4595, Unknown=0, NotChecked=0, Total=5402 [2024-12-02 14:25:37,544 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:37,544 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 551 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:25:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-12-02 14:25:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2024-12-02 14:25:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.026143790849673) internal successors, (157), 154 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2024-12-02 14:25:37,546 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 144 [2024-12-02 14:25:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:37,546 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2024-12-02 14:25:37,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.407407407407407) internal successors, (238), 55 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2024-12-02 14:25:37,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-12-02 14:25:37,547 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:37,547 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:37,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 14:25:37,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 14:25:37,747 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:37,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1929726178, now seen corresponding path program 16 times [2024-12-02 14:25:37,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:37,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138868724] [2024-12-02 14:25:37,748 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:25:37,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:37,796 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:25:37,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 271 proven. 202 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138868724] [2024-12-02 14:25:39,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138868724] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585397745] [2024-12-02 14:25:39,056 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:25:39,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:39,058 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:39,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 14:25:40,386 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:25:40,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:40,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-12-02 14:25:40,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:40,733 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 [2024-12-02 14:25:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 50 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:41,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:41,335 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 [2024-12-02 14:25:41,337 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 [2024-12-02 14:25:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 50 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-12-02 14:25:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585397745] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:41,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 55 [2024-12-02 14:25:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552268235] [2024-12-02 14:25:41,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:41,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-12-02 14:25:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:41,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-12-02 14:25:41,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2807, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 14:25:41,503 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:43,830 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2024-12-02 14:25:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-12-02 14:25:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 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 150 [2024-12-02 14:25:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:43,830 INFO L225 Difference]: With dead ends: 265 [2024-12-02 14:25:43,830 INFO L226 Difference]: Without dead ends: 162 [2024-12-02 14:25:43,831 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=582, Invalid=8730, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 14:25:43,831 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 56 mSDsluCounter, 1999 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:43,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2054 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 14:25:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-12-02 14:25:43,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2024-12-02 14:25:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 158 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) [2024-12-02 14:25:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2024-12-02 14:25:43,833 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 150 [2024-12-02 14:25:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:43,833 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2024-12-02 14:25:43,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.290909090909091) internal successors, (236), 55 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2024-12-02 14:25:43,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-12-02 14:25:43,834 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:43,834 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:43,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 14:25:44,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-12-02 14:25:44,035 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:44,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1997244393, now seen corresponding path program 17 times [2024-12-02 14:25:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:44,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555551717] [2024-12-02 14:25:44,035 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:25:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:44,122 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 14:25:44,122 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-12-02 14:25:44,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:25:44,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555551717] [2024-12-02 14:25:44,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555551717] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:25:44,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925400206] [2024-12-02 14:25:44,891 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:25:44,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:25:44,893 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:25:44,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 14:25:56,558 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 14:25:56,558 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:25:56,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 14:25:56,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:25:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-12-02 14:25:56,859 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:25:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 83 proven. 387 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-12-02 14:25:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925400206] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:25:57,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:25:57,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 63 [2024-12-02 14:25:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069618461] [2024-12-02 14:25:57,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:25:57,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-12-02 14:25:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:25:57,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-12-02 14:25:57,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3707, Unknown=0, NotChecked=0, Total=3906 [2024-12-02 14:25:57,769 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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) [2024-12-02 14:25:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:25:58,760 INFO L93 Difference]: Finished difference Result 227 states and 229 transitions. [2024-12-02 14:25:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-12-02 14:25:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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) Word has length 154 [2024-12-02 14:25:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:25:58,760 INFO L225 Difference]: With dead ends: 227 [2024-12-02 14:25:58,760 INFO L226 Difference]: Without dead ends: 166 [2024-12-02 14:25:58,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=284, Invalid=4972, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 14:25:58,761 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 41 mSDsluCounter, 2623 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:25:58,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2695 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 14:25:58,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-12-02 14:25:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2024-12-02 14:25:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:25:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2024-12-02 14:25:58,763 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 154 [2024-12-02 14:25:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:25:58,763 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2024-12-02 14:25:58,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.2063492063492065) internal successors, (265), 63 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) [2024-12-02 14:25:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2024-12-02 14:25:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-12-02 14:25:58,764 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:25:58,764 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:25:58,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 14:25:58,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:25:58,964 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:25:58,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:25:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1638875312, now seen corresponding path program 18 times [2024-12-02 14:25:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:25:58,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498095606] [2024-12-02 14:25:58,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:25:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:25:59,053 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 14:25:59,053 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 120 proven. 390 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 14:26:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:26:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498095606] [2024-12-02 14:26:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498095606] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:26:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129750305] [2024-12-02 14:26:00,680 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:26:00,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:26:00,682 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:26:00,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 14:26:08,872 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 14:26:08,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:08,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-12-02 14:26:08,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:26:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 153 proven. 357 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 14:26:09,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:26:09,935 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 [2024-12-02 14:26:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 153 proven. 357 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 14:26:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129750305] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:26:10,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:26:10,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 59 [2024-12-02 14:26:10,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503017322] [2024-12-02 14:26:10,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:26:10,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-12-02 14:26:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:26:10,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-12-02 14:26:10,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2024-12-02 14:26:10,140 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:26:10,944 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2024-12-02 14:26:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-12-02 14:26:10,945 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2024-12-02 14:26:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:26:10,945 INFO L225 Difference]: With dead ends: 172 [2024-12-02 14:26:10,945 INFO L226 Difference]: Without dead ends: 169 [2024-12-02 14:26:10,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 277 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=985, Invalid=5335, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 14:26:10,946 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:26:10,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 487 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:26:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-12-02 14:26:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2024-12-02 14:26:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2024-12-02 14:26:10,948 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 158 [2024-12-02 14:26:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:26:10,948 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2024-12-02 14:26:10,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.322033898305085) internal successors, (255), 60 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:10,948 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2024-12-02 14:26:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-12-02 14:26:10,949 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:26:10,949 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:26:10,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 14:26:11,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:11,149 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:26:11,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:26:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 402768069, now seen corresponding path program 19 times [2024-12-02 14:26:11,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:26:11,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127841156] [2024-12-02 14:26:11,150 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:26:11,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:26:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:26:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 92 proven. 480 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2024-12-02 14:26:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:26:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127841156] [2024-12-02 14:26:11,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127841156] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:26:11,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381811602] [2024-12-02 14:26:11,743 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:26:11,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:26:11,745 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:26:11,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 14:26:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:26:12,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-12-02 14:26:12,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:26:12,367 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 [2024-12-02 14:26:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 55 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 14:26:12,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:26:12,994 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 [2024-12-02 14:26:12,996 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 [2024-12-02 14:26:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 55 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-12-02 14:26:13,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381811602] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:26:13,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:26:13,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 29] total 56 [2024-12-02 14:26:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664516610] [2024-12-02 14:26:13,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:26:13,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-12-02 14:26:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:26:13,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-12-02 14:26:13,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2962, Unknown=0, NotChecked=0, Total=3080 [2024-12-02 14:26:13,161 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 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) [2024-12-02 14:26:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:26:15,932 INFO L93 Difference]: Finished difference Result 437 states and 440 transitions. [2024-12-02 14:26:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-12-02 14:26:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 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) Word has length 164 [2024-12-02 14:26:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:26:15,933 INFO L225 Difference]: With dead ends: 437 [2024-12-02 14:26:15,933 INFO L226 Difference]: Without dead ends: 183 [2024-12-02 14:26:15,933 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=334, Invalid=9968, Unknown=0, NotChecked=0, Total=10302 [2024-12-02 14:26:15,934 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 38 mSDsluCounter, 2962 mSDsCounter, 0 mSdLazyCounter, 5221 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 5231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:26:15,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3025 Invalid, 5231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5221 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 14:26:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-12-02 14:26:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2024-12-02 14:26:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.022857142857143) internal successors, (179), 176 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2024-12-02 14:26:15,935 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 164 [2024-12-02 14:26:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:26:15,936 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2024-12-02 14:26:15,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.464285714285714) internal successors, (250), 56 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) [2024-12-02 14:26:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2024-12-02 14:26:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-12-02 14:26:15,936 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:26:15,937 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:26:15,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 14:26:16,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:16,137 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:26:16,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:26:16,137 INFO L85 PathProgramCache]: Analyzing trace with hash -492836489, now seen corresponding path program 20 times [2024-12-02 14:26:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:26:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847396765] [2024-12-02 14:26:16,138 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:26:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:26:16,180 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:26:16,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:17,214 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 153 proven. 463 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 14:26:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:26:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847396765] [2024-12-02 14:26:17,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847396765] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:26:17,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607848354] [2024-12-02 14:26:17,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:26:17,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:26:17,216 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:26:17,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 14:26:17,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:26:17,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:17,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-12-02 14:26:17,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:26:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 190 proven. 426 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 14:26:17,987 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:26:18,638 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 [2024-12-02 14:26:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 190 proven. 426 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 14:26:18,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607848354] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:26:18,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:26:18,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 59 [2024-12-02 14:26:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692745554] [2024-12-02 14:26:18,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:26:18,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-12-02 14:26:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:26:18,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-12-02 14:26:18,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3141, Unknown=0, NotChecked=0, Total=3540 [2024-12-02 14:26:18,895 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:19,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:26:19,877 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2024-12-02 14:26:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 14:26:19,878 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 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 172 [2024-12-02 14:26:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:26:19,878 INFO L225 Difference]: With dead ends: 186 [2024-12-02 14:26:19,878 INFO L226 Difference]: Without dead ends: 183 [2024-12-02 14:26:19,878 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 301 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 14:26:19,879 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 11 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 14:26:19,879 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1504 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1999 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 14:26:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-12-02 14:26:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2024-12-02 14:26:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2024-12-02 14:26:19,881 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 172 [2024-12-02 14:26:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:26:19,881 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2024-12-02 14:26:19,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.559322033898305) internal successors, (269), 60 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:26:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2024-12-02 14:26:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-12-02 14:26:19,882 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:26:19,882 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:26:19,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 14:26:20,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:20,083 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:26:20,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:26:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2044490156, now seen corresponding path program 21 times [2024-12-02 14:26:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:26:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754568643] [2024-12-02 14:26:20,083 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:26:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:26:20,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 14:26:20,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 101 proven. 583 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-12-02 14:26:20,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:26:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754568643] [2024-12-02 14:26:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754568643] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:26:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605138727] [2024-12-02 14:26:20,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:26:20,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:26:20,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:26:20,875 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:26:20,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 14:26:58,227 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 14:26:58,227 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:26:58,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-12-02 14:26:58,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:26:59,001 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 [2024-12-02 14:26:59,988 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 [2024-12-02 14:27:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 60 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 14:27:00,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:27:00,792 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 [2024-12-02 14:27:00,793 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 [2024-12-02 14:27:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 60 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-12-02 14:27:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605138727] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:27:01,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:27:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31, 31] total 86 [2024-12-02 14:27:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572025510] [2024-12-02 14:27:01,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:27:01,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-12-02 14:27:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:27:01,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-12-02 14:27:01,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=7104, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 14:27:01,465 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 86 states, 86 states have (on average 4.558139534883721) internal successors, (392), 86 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:27:05,921 INFO L93 Difference]: Finished difference Result 473 states and 476 transitions. [2024-12-02 14:27:05,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-12-02 14:27:05,922 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.558139534883721) internal successors, (392), 86 states have internal predecessors, (392), 0 states have call successors, (0), 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 178 [2024-12-02 14:27:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:27:05,922 INFO L225 Difference]: With dead ends: 473 [2024-12-02 14:27:05,922 INFO L226 Difference]: Without dead ends: 197 [2024-12-02 14:27:05,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=489, Invalid=17871, Unknown=0, NotChecked=0, Total=18360 [2024-12-02 14:27:05,923 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 37 mSDsluCounter, 4489 mSDsCounter, 0 mSdLazyCounter, 7881 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4558 SdHoareTripleChecker+Invalid, 7892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 7881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:27:05,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4558 Invalid, 7892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 7881 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-12-02 14:27:05,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-12-02 14:27:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 191. [2024-12-02 14:27:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 190 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2024-12-02 14:27:05,925 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 178 [2024-12-02 14:27:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:27:05,925 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2024-12-02 14:27:05,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.558139534883721) internal successors, (392), 86 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2024-12-02 14:27:05,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-12-02 14:27:05,925 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:27:05,925 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:27:05,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 14:27:06,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:27:06,126 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:27:06,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:27:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1207444770, now seen corresponding path program 22 times [2024-12-02 14:27:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:27:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412172093] [2024-12-02 14:27:06,126 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:27:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:27:06,166 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:27:06,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:27:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 190 proven. 542 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-12-02 14:27:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:27:07,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412172093] [2024-12-02 14:27:07,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412172093] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:27:07,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153136567] [2024-12-02 14:27:07,096 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:27:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:27:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:27:07,098 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:27:07,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 14:27:08,302 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:27:08,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:27:08,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-12-02 14:27:08,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:27:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 231 proven. 501 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-12-02 14:27:08,634 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:27:09,294 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 [2024-12-02 14:27:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 231 proven. 501 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-12-02 14:27:09,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153136567] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:27:09,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:27:09,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2024-12-02 14:27:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569069115] [2024-12-02 14:27:09,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:27:09,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 14:27:09,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:27:09,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 14:27:09,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 14:27:09,409 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 49 states, 48 states have (on average 4.8125) internal successors, (231), 49 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:27:10,535 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2024-12-02 14:27:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-12-02 14:27:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.8125) internal successors, (231), 49 states have internal predecessors, (231), 0 states have call successors, (0), 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 [2024-12-02 14:27:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:27:10,537 INFO L225 Difference]: With dead ends: 200 [2024-12-02 14:27:10,537 INFO L226 Difference]: Without dead ends: 197 [2024-12-02 14:27:10,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 340 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2024-12-02 14:27:10,537 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:27:10,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1766 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 14:27:10,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-12-02 14:27:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-12-02 14:27:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2024-12-02 14:27:10,540 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 186 [2024-12-02 14:27:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:27:10,540 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2024-12-02 14:27:10,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.8125) internal successors, (231), 49 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:27:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2024-12-02 14:27:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-12-02 14:27:10,541 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:27:10,541 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:27:10,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 14:27:10,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:27:10,741 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:27:10,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:27:10,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1819113939, now seen corresponding path program 23 times [2024-12-02 14:27:10,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:27:10,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020632684] [2024-12-02 14:27:10,742 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:27:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:27:10,880 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 14:27:10,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:27:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 380 proven. 426 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-12-02 14:27:12,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:27:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020632684] [2024-12-02 14:27:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020632684] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:27:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239732559] [2024-12-02 14:27:12,584 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:27:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:27:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:27:12,586 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:27:12,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 14:28:09,745 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 14:28:09,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:28:09,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-12-02 14:28:09,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:28:10,296 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 [2024-12-02 14:28:10,949 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 9 treesize of output 3 [2024-12-02 14:28:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 65 proven. 744 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-12-02 14:28:10,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:28:11,113 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 [2024-12-02 14:28:11,115 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 [2024-12-02 14:28:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 65 proven. 744 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-12-02 14:28:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239732559] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:28:11,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:28:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 75 [2024-12-02 14:28:11,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870707586] [2024-12-02 14:28:11,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:28:11,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-12-02 14:28:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:28:11,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-12-02 14:28:11,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=5303, Unknown=0, NotChecked=0, Total=5550 [2024-12-02 14:28:11,298 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:28:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:28:15,577 INFO L93 Difference]: Finished difference Result 509 states and 512 transitions. [2024-12-02 14:28:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-12-02 14:28:15,577 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 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 192 [2024-12-02 14:28:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:28:15,577 INFO L225 Difference]: With dead ends: 509 [2024-12-02 14:28:15,578 INFO L226 Difference]: Without dead ends: 211 [2024-12-02 14:28:15,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=714, Invalid=19026, Unknown=0, NotChecked=0, Total=19740 [2024-12-02 14:28:15,579 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 39 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 7634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3514 SdHoareTripleChecker+Invalid, 7648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 7634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:28:15,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3514 Invalid, 7648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 7634 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 14:28:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-12-02 14:28:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2024-12-02 14:28:15,581 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) [2024-12-02 14:28:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2024-12-02 14:28:15,581 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 192 [2024-12-02 14:28:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:28:15,581 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2024-12-02 14:28:15,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:28:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2024-12-02 14:28:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-12-02 14:28:15,582 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:28:15,582 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:28:15,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 14:28:15,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-12-02 14:28:15,782 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:28:15,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:28:15,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1861436293, now seen corresponding path program 24 times [2024-12-02 14:28:15,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:28:15,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073749812] [2024-12-02 14:28:15,783 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:28:15,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:28:15,912 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:28:15,912 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:28:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 231 proven. 627 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:28:18,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:28:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073749812] [2024-12-02 14:28:18,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073749812] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:28:18,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980718074] [2024-12-02 14:28:18,069 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 14:28:18,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:28:18,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:28:18,071 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:28:18,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 14:30:06,083 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 14:30:06,083 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:30:06,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-12-02 14:30:06,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:30:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 276 proven. 907 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:30:07,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:30:08,930 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 [2024-12-02 14:30:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 276 proven. 582 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:30:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980718074] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:30:09,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:30:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 48, 32] total 117 [2024-12-02 14:30:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603902650] [2024-12-02 14:30:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:30:09,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-12-02 14:30:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:09,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-12-02 14:30:09,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1441, Invalid=12365, Unknown=0, NotChecked=0, Total=13806 [2024-12-02 14:30:09,636 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 118 states, 117 states have (on average 4.239316239316239) internal successors, (496), 118 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:12,647 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2024-12-02 14:30:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 14:30:12,647 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 4.239316239316239) internal successors, (496), 118 states have internal predecessors, (496), 0 states have call successors, (0), 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 200 [2024-12-02 14:30:12,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:12,648 INFO L225 Difference]: With dead ends: 221 [2024-12-02 14:30:12,648 INFO L226 Difference]: Without dead ends: 218 [2024-12-02 14:30:12,649 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9043 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2489, Invalid=22633, Unknown=0, NotChecked=0, Total=25122 [2024-12-02 14:30:12,649 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 3717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:12,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1476 Invalid, 3717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 14:30:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-12-02 14:30:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2024-12-02 14:30:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 209 states have (on average 1.0191387559808613) internal successors, (213), 210 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2024-12-02 14:30:12,651 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 200 [2024-12-02 14:30:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:12,651 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2024-12-02 14:30:12,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 4.239316239316239) internal successors, (496), 118 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2024-12-02 14:30:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-12-02 14:30:12,652 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:12,653 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:12,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-12-02 14:30:12,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-12-02 14:30:12,853 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:30:12,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash 291211578, now seen corresponding path program 25 times [2024-12-02 14:30:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:12,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396558329] [2024-12-02 14:30:12,853 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:30:12,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 547 proven. 394 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:30:14,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396558329] [2024-12-02 14:30:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396558329] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:30:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359185240] [2024-12-02 14:30:14,737 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 14:30:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:30:14,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:30:14,739 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:30:14,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 14:30:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:15,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 156 conjuncts are in the unsatisfiable core [2024-12-02 14:30:15,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:30:15,638 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 [2024-12-02 14:30:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 70 proven. 871 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:30:16,610 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:30:16,759 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 15 treesize of output 13 [2024-12-02 14:30:16,761 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 [2024-12-02 14:30:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 70 proven. 871 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:30:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359185240] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:30:17,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:30:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 71 [2024-12-02 14:30:17,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787680532] [2024-12-02 14:30:17,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:30:17,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-12-02 14:30:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:17,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-12-02 14:30:17,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2024-12-02 14:30:17,031 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 71 states, 71 states have (on average 4.450704225352113) internal successors, (316), 71 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:20,866 INFO L93 Difference]: Finished difference Result 361 states and 364 transitions. [2024-12-02 14:30:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 14:30:20,867 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.450704225352113) internal successors, (316), 71 states have internal predecessors, (316), 0 states have call successors, (0), 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 206 [2024-12-02 14:30:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:20,867 INFO L225 Difference]: With dead ends: 361 [2024-12-02 14:30:20,867 INFO L226 Difference]: Without dead ends: 218 [2024-12-02 14:30:20,868 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2024-12-02 14:30:20,868 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 35 mSDsluCounter, 3412 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3483 SdHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:20,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3483 Invalid, 4539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 14:30:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-12-02 14:30:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2024-12-02 14:30:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 214 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) [2024-12-02 14:30:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2024-12-02 14:30:20,870 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 206 [2024-12-02 14:30:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:20,870 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2024-12-02 14:30:20,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.450704225352113) internal successors, (316), 71 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2024-12-02 14:30:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-12-02 14:30:20,871 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:20,871 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:20,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 14:30:21,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:30:21,071 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:30:21,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1645349683, now seen corresponding path program 26 times [2024-12-02 14:30:21,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:21,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451785095] [2024-12-02 14:30:21,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:30:21,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:21,126 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:30:21,126 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:30:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 119 proven. 819 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2024-12-02 14:30:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:21,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451785095] [2024-12-02 14:30:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451785095] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:30:21,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173642437] [2024-12-02 14:30:21,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:30:21,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:30:21,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:30:21,944 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:30:21,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 14:30:22,315 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 14:30:22,315 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:30:22,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 191 conjuncts are in the unsatisfiable core [2024-12-02 14:30:22,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:30:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 14:30:24,278 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:30:27,585 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 [2024-12-02 14:30:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 276 proven. 665 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 14:30:28,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173642437] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:30:28,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:30:28,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 48, 48] total 114 [2024-12-02 14:30:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017317565] [2024-12-02 14:30:28,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:30:28,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-12-02 14:30:28,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:28,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-12-02 14:30:28,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=12046, Unknown=0, NotChecked=0, Total=12882 [2024-12-02 14:30:28,745 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 114 states, 114 states have (on average 3.5350877192982457) internal successors, (403), 114 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:34,483 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2024-12-02 14:30:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-12-02 14:30:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.5350877192982457) internal successors, (403), 114 states have internal predecessors, (403), 0 states have call successors, (0), 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 210 [2024-12-02 14:30:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:34,484 INFO L225 Difference]: With dead ends: 316 [2024-12-02 14:30:34,484 INFO L226 Difference]: Without dead ends: 228 [2024-12-02 14:30:34,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1909, Invalid=27503, Unknown=0, NotChecked=0, Total=29412 [2024-12-02 14:30:34,485 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 22 mSDsluCounter, 2926 mSDsCounter, 0 mSdLazyCounter, 6346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 6347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:34,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2985 Invalid, 6347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6346 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-12-02 14:30:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-12-02 14:30:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2024-12-02 14:30:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 224 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2024-12-02 14:30:34,487 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 210 [2024-12-02 14:30:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:34,487 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2024-12-02 14:30:34,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.5350877192982457) internal successors, (403), 114 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:30:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2024-12-02 14:30:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-12-02 14:30:34,488 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:34,488 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:34,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 14:30:34,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:30:34,688 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:30:34,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash 17911777, now seen corresponding path program 27 times [2024-12-02 14:30:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75497732] [2024-12-02 14:30:34,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:30:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:34,821 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-12-02 14:30:34,821 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:30:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 631 proven. 830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:30:42,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75497732] [2024-12-02 14:30:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75497732] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:30:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911901898] [2024-12-02 14:30:42,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:30:42,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:30:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:30:42,056 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:30:42,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 14:32:28,158 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-12-02 14:32:28,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:32:28,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-12-02 14:32:28,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:32:31,136 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 [2024-12-02 14:32:33,090 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 [2024-12-02 14:32:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 75 proven. 1386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 14:32:33,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:32:34,966 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 [2024-12-02 14:32:34,967 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 [2024-12-02 14:32:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1461 backedges. 75 proven. 1061 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-12-02 14:32:36,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911901898] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:32:36,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:32:36,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 53, 39] total 156 [2024-12-02 14:32:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776132936] [2024-12-02 14:32:36,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:32:36,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2024-12-02 14:32:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:32:36,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2024-12-02 14:32:36,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=23402, Unknown=0, NotChecked=0, Total=24180 [2024-12-02 14:32:36,878 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 156 states, 156 states have (on average 3.8205128205128207) internal successors, (596), 156 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:32:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:32:51,333 INFO L93 Difference]: Finished difference Result 487 states and 490 transitions. [2024-12-02 14:32:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-12-02 14:32:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.8205128205128207) internal successors, (596), 156 states have internal predecessors, (596), 0 states have call successors, (0), 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 220 [2024-12-02 14:32:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:32:51,334 INFO L225 Difference]: With dead ends: 487 [2024-12-02 14:32:51,334 INFO L226 Difference]: Without dead ends: 232 [2024-12-02 14:32:51,335 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 354 SyntacticMatches, 1 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12357 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=1668, Invalid=52388, Unknown=0, NotChecked=0, Total=54056 [2024-12-02 14:32:51,336 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 154 mSDsluCounter, 7899 mSDsCounter, 0 mSdLazyCounter, 14262 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 7985 SdHoareTripleChecker+Invalid, 14292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 14262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:32:51,336 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 7985 Invalid, 14292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 14262 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-12-02 14:32:51,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-12-02 14:32:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2024-12-02 14:32:51,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 227 states have (on average 1.0176211453744493) internal successors, (231), 228 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:32:51,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2024-12-02 14:32:51,337 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 220 [2024-12-02 14:32:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:32:51,337 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2024-12-02 14:32:51,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.8205128205128207) internal successors, (596), 156 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:32:51,338 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2024-12-02 14:32:51,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2024-12-02 14:32:51,338 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:32:51,338 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:32:51,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-12-02 14:32:51,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:32:51,539 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:32:51,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:32:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -767792614, now seen corresponding path program 28 times [2024-12-02 14:32:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:32:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019523770] [2024-12-02 14:32:51,539 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:32:51,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:32:51,624 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:32:51,624 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:32:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 128 proven. 952 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-12-02 14:32:52,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:32:52,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019523770] [2024-12-02 14:32:52,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019523770] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:32:52,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376183107] [2024-12-02 14:32:52,561 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 14:32:52,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:32:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:32:52,562 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:32:52,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 14:33:05,708 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 14:33:05,709 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:33:05,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-12-02 14:33:05,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:33:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 128 proven. 952 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-12-02 14:33:05,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:33:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 128 proven. 952 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-12-02 14:33:07,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376183107] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:33:07,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:33:07,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2024-12-02 14:33:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906127876] [2024-12-02 14:33:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:33:07,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-12-02 14:33:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:33:07,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-12-02 14:33:07,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4645, Unknown=0, NotChecked=0, Total=4830 [2024-12-02 14:33:07,435 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 70 states, 70 states have (on average 4.585714285714285) internal successors, (321), 70 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) [2024-12-02 14:33:09,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:33:09,108 INFO L93 Difference]: Finished difference Result 327 states and 329 transitions. [2024-12-02 14:33:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-12-02 14:33:09,109 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.585714285714285) internal successors, (321), 70 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 224 [2024-12-02 14:33:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:33:09,109 INFO L225 Difference]: With dead ends: 327 [2024-12-02 14:33:09,109 INFO L226 Difference]: Without dead ends: 236 [2024-12-02 14:33:09,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=6556, Unknown=0, NotChecked=0, Total=6806 [2024-12-02 14:33:09,110 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 31 mSDsluCounter, 5119 mSDsCounter, 0 mSdLazyCounter, 3368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 3382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:33:09,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 5221 Invalid, 3382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3368 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 14:33:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-12-02 14:33:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 233. [2024-12-02 14:33:09,111 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) [2024-12-02 14:33:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2024-12-02 14:33:09,111 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 224 [2024-12-02 14:33:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:33:09,112 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2024-12-02 14:33:09,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.585714285714285) internal successors, (321), 70 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) [2024-12-02 14:33:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2024-12-02 14:33:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-12-02 14:33:09,112 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:33:09,112 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:33:09,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-12-02 14:33:09,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:33:09,313 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-12-02 14:33:09,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:33:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1831650669, now seen corresponding path program 29 times [2024-12-02 14:33:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:33:09,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476301718] [2024-12-02 14:33:09,313 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:33:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:33:09,464 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-12-02 14:33:09,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:33:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 378 proven. 762 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2024-12-02 14:33:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:33:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476301718] [2024-12-02 14:33:11,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476301718] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:33:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510508371] [2024-12-02 14:33:11,067 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 14:33:11,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:33:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:33:11,069 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:33:11,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70e20b37-6ad0-4ffd-be95-c2150e4ef44e/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process