./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9c7796745953b6206348345fcef2fe39b8cd94bc666f8f6dde12d2e156216f8e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:35:25,954 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:35:26,039 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-23 23:35:26,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:35:26,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:35:26,073 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:35:26,074 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:35:26,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:35:26,075 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:35:26,075 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:35:26,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:35:26,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:35:26,076 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:35:26,076 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:35:26,076 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:35:26,076 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:35:26,077 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:35:26,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:35:26,077 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:35:26,077 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:35:26,077 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:35:26,078 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:35:26,078 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:35:26,078 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:35:26,078 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:35:26,078 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:35:26,079 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:35:26,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:35:26,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:35:26,079 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:35:26,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:35:26,080 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:35:26,080 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:35:26,080 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:35:26,080 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:35:26,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:35:26,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:35:26,081 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:35:26,082 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_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c7796745953b6206348345fcef2fe39b8cd94bc666f8f6dde12d2e156216f8e [2024-11-23 23:35:26,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:35:26,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:35:26,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:35:26,479 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:35:26,480 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:35:26,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/busybox-1.22.0/sleep-3.i [2024-11-23 23:35:29,823 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/data/b80196d43/28e5472d2d044e179c1216a8064c2097/FLAGd62438792 [2024-11-23 23:35:30,409 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:35:30,409 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/sv-benchmarks/c/busybox-1.22.0/sleep-3.i [2024-11-23 23:35:30,443 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/data/b80196d43/28e5472d2d044e179c1216a8064c2097/FLAGd62438792 [2024-11-23 23:35:30,460 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/data/b80196d43/28e5472d2d044e179c1216a8064c2097 [2024-11-23 23:35:30,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:35:30,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:35:30,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:35:30,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:35:30,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:35:30,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:35:30" (1/1) ... [2024-11-23 23:35:30,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1110f2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:30, skipping insertion in model container [2024-11-23 23:35:30,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:35:30" (1/1) ... [2024-11-23 23:35:30,573 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:35:31,977 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,981 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,983 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,990 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,991 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,991 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,997 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,997 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:31,999 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,002 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,008 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,024 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,024 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,036 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,042 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,055 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,071 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,085 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,107 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:35:32,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:35:32,148 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:35:32,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:35:32,484 WARN L1212 FunctionHandler]: The following functions are not defined or handled internally: vasprintf [2024-11-23 23:35:32,493 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:35:32,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32 WrapperNode [2024-11-23 23:35:32,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:35:32,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:35:32,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:35:32,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:35:32,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,607 INFO L138 Inliner]: procedures = 633, calls = 577, calls flagged for inlining = 17, calls inlined = 15, statements flattened = 1055 [2024-11-23 23:35:32,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:35:32,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:35:32,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:35:32,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:35:32,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,633 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,652 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Memory array in LHS [2024-11-23 23:35:32,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,722 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,739 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,765 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:35:32,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:35:32,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:35:32,787 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:35:32,788 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (1/1) ... [2024-11-23 23:35:32,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:35:32,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:35:32,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:35:32,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:35:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 23:35:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2024-11-23 23:35:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure xatoul_sfx [2024-11-23 23:35:32,883 INFO L138 BoogieDeclarations]: Found implementation of procedure xatoul_sfx [2024-11-23 23:35:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-23 23:35:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-23 23:35:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:35:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:35:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-23 23:35:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:35:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:35:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2024-11-23 23:35:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2024-11-23 23:35:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2024-11-23 23:35:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-23 23:35:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-23 23:35:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-23 23:35:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 23:35:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-23 23:35:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure bb_show_usage [2024-11-23 23:35:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_show_usage [2024-11-23 23:35:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-23 23:35:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure bb_error_msg_and_die [2024-11-23 23:35:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure bb_error_msg_and_die [2024-11-23 23:35:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-23 23:35:33,490 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:35:33,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:35:39,665 INFO L? ?]: Removed 542 outVars from TransFormulas that were not future-live. [2024-11-23 23:35:39,665 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:35:39,702 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:35:39,706 INFO L312 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-23 23:35:39,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:35:39 BoogieIcfgContainer [2024-11-23 23:35:39,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:35:39,711 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:35:39,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:35:39,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:35:39,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:35:30" (1/3) ... [2024-11-23 23:35:39,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2656fda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:35:39, skipping insertion in model container [2024-11-23 23:35:39,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:32" (2/3) ... [2024-11-23 23:35:39,721 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2656fda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:35:39, skipping insertion in model container [2024-11-23 23:35:39,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:35:39" (3/3) ... [2024-11-23 23:35:39,722 INFO L128 eAbstractionObserver]: Analyzing ICFG sleep-3.i [2024-11-23 23:35:39,743 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:35:39,748 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sleep-3.i that has 6 procedures, 509 locations, 1 initial locations, 14 loop locations, and 211 error locations. [2024-11-23 23:35:39,807 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:35:39,821 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;@63d23b16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:35:39,821 INFO L334 AbstractCegarLoop]: Starting to check reachability of 211 error locations. [2024-11-23 23:35:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 509 states, 278 states have (on average 1.9820143884892085) internal successors, (551), 491 states have internal predecessors, (551), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-23 23:35:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-23 23:35:39,835 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:35:39,836 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-23 23:35:39,836 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:35:39,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:35:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 339673, now seen corresponding path program 1 times [2024-11-23 23:35:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:35:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371322120] [2024-11-23 23:35:39,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:35:39,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:35:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:35:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:35:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:35:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371322120] [2024-11-23 23:35:41,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371322120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:35:41,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:35:41,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:35:41,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755917559] [2024-11-23 23:35:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:35:41,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:35:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:35:41,294 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:35:41,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:35:41,299 INFO L87 Difference]: Start difference. First operand has 509 states, 278 states have (on average 1.9820143884892085) internal successors, (551), 491 states have internal predecessors, (551), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:35:45,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:35:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:35:46,062 INFO L93 Difference]: Finished difference Result 395 states and 431 transitions. [2024-11-23 23:35:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:35:46,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-23 23:35:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:35:46,075 INFO L225 Difference]: With dead ends: 395 [2024-11-23 23:35:46,075 INFO L226 Difference]: Without dead ends: 389 [2024-11-23 23:35:46,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:35:46,079 INFO L435 NwaCegarLoop]: 319 mSDtfsCounter, 107 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:35:46,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 495 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 190 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-23 23:35:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2024-11-23 23:35:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 336. [2024-11-23 23:35:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 182 states have (on average 1.9285714285714286) internal successors, (351), 326 states have internal predecessors, (351), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:35:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 365 transitions. [2024-11-23 23:35:46,170 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 365 transitions. Word has length 3 [2024-11-23 23:35:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:35:46,170 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 365 transitions. [2024-11-23 23:35:46,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:35:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 365 transitions. [2024-11-23 23:35:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-23 23:35:46,171 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:35:46,172 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-23 23:35:46,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:35:46,172 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:35:46,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:35:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 339674, now seen corresponding path program 1 times [2024-11-23 23:35:46,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:35:46,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969697241] [2024-11-23 23:35:46,174 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:35:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:35:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:35:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:35:46,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:35:46,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969697241] [2024-11-23 23:35:46,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969697241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:35:46,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:35:46,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:35:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056647586] [2024-11-23 23:35:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:35:46,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:35:46,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:35:46,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:35:46,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:35:46,980 INFO L87 Difference]: Start difference. First operand 336 states and 365 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:35:51,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:35:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:35:51,447 INFO L93 Difference]: Finished difference Result 335 states and 364 transitions. [2024-11-23 23:35:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:35:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-23 23:35:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:35:51,449 INFO L225 Difference]: With dead ends: 335 [2024-11-23 23:35:51,449 INFO L226 Difference]: Without dead ends: 335 [2024-11-23 23:35:51,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:35:51,450 INFO L435 NwaCegarLoop]: 357 mSDtfsCounter, 12 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:35:51,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 566 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-23 23:35:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-11-23 23:35:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2024-11-23 23:35:51,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 182 states have (on average 1.9230769230769231) internal successors, (350), 325 states have internal predecessors, (350), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:35:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 364 transitions. [2024-11-23 23:35:51,505 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 364 transitions. Word has length 3 [2024-11-23 23:35:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:35:51,505 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 364 transitions. [2024-11-23 23:35:51,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:35:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 364 transitions. [2024-11-23 23:35:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 23:35:51,509 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:35:51,509 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:35:51,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:35:51,510 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:35:51,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:35:51,510 INFO L85 PathProgramCache]: Analyzing trace with hash 171407905, now seen corresponding path program 1 times [2024-11-23 23:35:51,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:35:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497124666] [2024-11-23 23:35:51,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:35:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:35:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:35:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:35:52,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:35:52,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497124666] [2024-11-23 23:35:52,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497124666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:35:52,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:35:52,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:35:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010900177] [2024-11-23 23:35:52,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:35:52,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:35:52,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:35:52,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:35:52,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:35:52,376 INFO L87 Difference]: Start difference. First operand 335 states and 364 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:35:56,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:00,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:01,220 INFO L93 Difference]: Finished difference Result 339 states and 368 transitions. [2024-11-23 23:36:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:36:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2024-11-23 23:36:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:01,223 INFO L225 Difference]: With dead ends: 339 [2024-11-23 23:36:01,224 INFO L226 Difference]: Without dead ends: 339 [2024-11-23 23:36:01,224 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:36:01,225 INFO L435 NwaCegarLoop]: 355 mSDtfsCounter, 12 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:01,225 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 776 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2024-11-23 23:36:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-23 23:36:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2024-11-23 23:36:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 185 states have (on average 1.9081081081081082) internal successors, (353), 328 states have internal predecessors, (353), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 367 transitions. [2024-11-23 23:36:01,257 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 367 transitions. Word has length 7 [2024-11-23 23:36:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:01,261 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 367 transitions. [2024-11-23 23:36:01,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 367 transitions. [2024-11-23 23:36:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-23 23:36:01,262 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:01,262 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:01,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:36:01,262 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:01,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -801429734, now seen corresponding path program 1 times [2024-11-23 23:36:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646111105] [2024-11-23 23:36:01,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:01,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:02,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646111105] [2024-11-23 23:36:02,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646111105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:36:02,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403098883] [2024-11-23 23:36:02,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:02,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:02,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:36:02,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:36:02,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:36:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:03,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 23:36:03,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:36:03,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:03,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:36:03,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-23 23:36:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:03,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403098883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:36:03,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:36:03,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-23 23:36:03,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546668754] [2024-11-23 23:36:03,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:36:03,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:36:03,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:03,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:36:03,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:36:03,645 INFO L87 Difference]: Start difference. First operand 338 states and 367 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:07,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:11,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:15,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:16,978 INFO L93 Difference]: Finished difference Result 343 states and 372 transitions. [2024-11-23 23:36:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:36:16,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-23 23:36:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:16,981 INFO L225 Difference]: With dead ends: 343 [2024-11-23 23:36:16,981 INFO L226 Difference]: Without dead ends: 343 [2024-11-23 23:36:16,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:36:16,983 INFO L435 NwaCegarLoop]: 353 mSDtfsCounter, 236 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:16,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1359 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 582 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2024-11-23 23:36:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-23 23:36:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2024-11-23 23:36:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 191 states have (on average 1.87434554973822) internal successors, (358), 333 states have internal predecessors, (358), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 372 transitions. [2024-11-23 23:36:16,997 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 372 transitions. Word has length 11 [2024-11-23 23:36:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:16,998 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 372 transitions. [2024-11-23 23:36:16,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 372 transitions. [2024-11-23 23:36:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-23 23:36:16,999 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:16,999 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:17,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:36:17,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:17,200 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:17,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:17,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1503306739, now seen corresponding path program 1 times [2024-11-23 23:36:17,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:17,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683710318] [2024-11-23 23:36:17,201 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:17,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683710318] [2024-11-23 23:36:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683710318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:36:18,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723237442] [2024-11-23 23:36:18,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:18,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:18,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:36:18,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:36:18,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:36:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:18,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:36:18,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:36:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:18,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:36:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723237442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:36:18,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:36:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-23 23:36:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981496222] [2024-11-23 23:36:18,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:36:18,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:36:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:18,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:36:18,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:36:18,946 INFO L87 Difference]: Start difference. First operand 343 states and 372 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:19,059 INFO L93 Difference]: Finished difference Result 363 states and 392 transitions. [2024-11-23 23:36:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:36:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2024-11-23 23:36:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:19,062 INFO L225 Difference]: With dead ends: 363 [2024-11-23 23:36:19,062 INFO L226 Difference]: Without dead ends: 363 [2024-11-23 23:36:19,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:36:19,063 INFO L435 NwaCegarLoop]: 360 mSDtfsCounter, 6 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:19,066 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1433 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:36:19,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-23 23:36:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2024-11-23 23:36:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 211 states have (on average 1.7914691943127963) internal successors, (378), 353 states have internal predecessors, (378), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 392 transitions. [2024-11-23 23:36:19,078 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 392 transitions. Word has length 19 [2024-11-23 23:36:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:19,079 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 392 transitions. [2024-11-23 23:36:19,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:19,079 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 392 transitions. [2024-11-23 23:36:19,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-23 23:36:19,080 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:19,080 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:19,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:36:19,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:19,284 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:19,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 735243370, now seen corresponding path program 2 times [2024-11-23 23:36:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:19,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599151611] [2024-11-23 23:36:19,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:36:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:19,609 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:36:19,610 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:36:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-23 23:36:20,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:20,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599151611] [2024-11-23 23:36:20,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599151611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:20,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:20,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:36:20,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886394211] [2024-11-23 23:36:20,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:20,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:36:20,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:20,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:36:20,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:36:20,230 INFO L87 Difference]: Start difference. First operand 363 states and 392 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:21,269 INFO L93 Difference]: Finished difference Result 512 states and 558 transitions. [2024-11-23 23:36:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:36:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) 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 39 [2024-11-23 23:36:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:21,273 INFO L225 Difference]: With dead ends: 512 [2024-11-23 23:36:21,273 INFO L226 Difference]: Without dead ends: 512 [2024-11-23 23:36:21,274 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:36:21,274 INFO L435 NwaCegarLoop]: 266 mSDtfsCounter, 409 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:21,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 796 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 23:36:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-23 23:36:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 366. [2024-11-23 23:36:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 214 states have (on average 1.7757009345794392) internal successors, (380), 355 states have internal predecessors, (380), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:21,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 394 transitions. [2024-11-23 23:36:21,289 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 394 transitions. Word has length 39 [2024-11-23 23:36:21,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:21,289 INFO L471 AbstractCegarLoop]: Abstraction has 366 states and 394 transitions. [2024-11-23 23:36:21,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:21,290 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 394 transitions. [2024-11-23 23:36:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-23 23:36:21,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:21,291 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:21,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:36:21,291 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:21,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 735243371, now seen corresponding path program 1 times [2024-11-23 23:36:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:21,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877037332] [2024-11-23 23:36:21,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877037332] [2024-11-23 23:36:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877037332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:36:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407390913] [2024-11-23 23:36:22,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:22,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:36:22,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:36:22,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:36:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:23,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:36:23,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:36:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:23,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:36:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:36:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407390913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:36:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:36:23,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-11-23 23:36:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560233620] [2024-11-23 23:36:23,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:36:23,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:36:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:23,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:36:23,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:36:23,556 INFO L87 Difference]: Start difference. First operand 366 states and 394 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:23,698 INFO L93 Difference]: Finished difference Result 374 states and 402 transitions. [2024-11-23 23:36:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:36:23,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-23 23:36:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:23,701 INFO L225 Difference]: With dead ends: 374 [2024-11-23 23:36:23,704 INFO L226 Difference]: Without dead ends: 374 [2024-11-23 23:36:23,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:36:23,705 INFO L435 NwaCegarLoop]: 359 mSDtfsCounter, 3 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1785 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:23,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1785 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 23:36:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-23 23:36:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2024-11-23 23:36:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 222 states have (on average 1.7477477477477477) internal successors, (388), 363 states have internal predecessors, (388), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 402 transitions. [2024-11-23 23:36:23,722 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 402 transitions. Word has length 39 [2024-11-23 23:36:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:23,722 INFO L471 AbstractCegarLoop]: Abstraction has 374 states and 402 transitions. [2024-11-23 23:36:23,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 402 transitions. [2024-11-23 23:36:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-23 23:36:23,724 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:23,724 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:23,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:36:23,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:36:23,925 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:23,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:23,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1613309475, now seen corresponding path program 2 times [2024-11-23 23:36:23,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:23,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270789989] [2024-11-23 23:36:23,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:36:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:24,253 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:36:24,253 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:36:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:36:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270789989] [2024-11-23 23:36:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270789989] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:24,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:24,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:36:24,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294376740] [2024-11-23 23:36:24,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:24,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:36:24,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:24,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:36:24,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:36:24,784 INFO L87 Difference]: Start difference. First operand 374 states and 402 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:28,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:30,195 INFO L93 Difference]: Finished difference Result 664 states and 719 transitions. [2024-11-23 23:36:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:36:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 47 [2024-11-23 23:36:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:30,200 INFO L225 Difference]: With dead ends: 664 [2024-11-23 23:36:30,203 INFO L226 Difference]: Without dead ends: 664 [2024-11-23 23:36:30,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:36:30,205 INFO L435 NwaCegarLoop]: 174 mSDtfsCounter, 449 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:30,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 637 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 649 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2024-11-23 23:36:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2024-11-23 23:36:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 373. [2024-11-23 23:36:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 222 states have (on average 1.7432432432432432) internal successors, (387), 362 states have internal predecessors, (387), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:30,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 401 transitions. [2024-11-23 23:36:30,223 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 401 transitions. Word has length 47 [2024-11-23 23:36:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:30,223 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 401 transitions. [2024-11-23 23:36:30,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:36:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 401 transitions. [2024-11-23 23:36:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-23 23:36:30,228 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:30,228 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:30,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:36:30,229 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:30,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2078147733, now seen corresponding path program 1 times [2024-11-23 23:36:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199586383] [2024-11-23 23:36:30,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:36:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199586383] [2024-11-23 23:36:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199586383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:31,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:31,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:36:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667873754] [2024-11-23 23:36:31,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:31,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:36:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:31,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:36:31,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:36:31,216 INFO L87 Difference]: Start difference. First operand 373 states and 401 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:35,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:35,657 INFO L93 Difference]: Finished difference Result 421 states and 454 transitions. [2024-11-23 23:36:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:36:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-11-23 23:36:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:35,660 INFO L225 Difference]: With dead ends: 421 [2024-11-23 23:36:35,661 INFO L226 Difference]: Without dead ends: 421 [2024-11-23 23:36:35,661 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:36:35,662 INFO L435 NwaCegarLoop]: 312 mSDtfsCounter, 83 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:35,662 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 495 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-11-23 23:36:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-23 23:36:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 368. [2024-11-23 23:36:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 222 states have (on average 1.7207207207207207) internal successors, (382), 357 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 396 transitions. [2024-11-23 23:36:35,675 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 396 transitions. Word has length 55 [2024-11-23 23:36:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:35,675 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 396 transitions. [2024-11-23 23:36:35,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 396 transitions. [2024-11-23 23:36:35,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-23 23:36:35,676 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:35,676 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:35,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:36:35,677 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:35,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:35,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2078147734, now seen corresponding path program 1 times [2024-11-23 23:36:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:35,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489056211] [2024-11-23 23:36:35,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:35,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:36:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489056211] [2024-11-23 23:36:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489056211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:37,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:37,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:36:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866794745] [2024-11-23 23:36:37,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:37,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:36:37,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:37,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:36:37,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:36:37,113 INFO L87 Difference]: Start difference. First operand 368 states and 396 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:41,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:41,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:41,800 INFO L93 Difference]: Finished difference Result 370 states and 399 transitions. [2024-11-23 23:36:41,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:36:41,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-11-23 23:36:41,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:41,803 INFO L225 Difference]: With dead ends: 370 [2024-11-23 23:36:41,803 INFO L226 Difference]: Without dead ends: 370 [2024-11-23 23:36:41,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:36:41,804 INFO L435 NwaCegarLoop]: 342 mSDtfsCounter, 196 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:41,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1519 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2024-11-23 23:36:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-23 23:36:41,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 367. [2024-11-23 23:36:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 222 states have (on average 1.7162162162162162) internal successors, (381), 356 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 395 transitions. [2024-11-23 23:36:41,815 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 395 transitions. Word has length 55 [2024-11-23 23:36:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:41,816 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 395 transitions. [2024-11-23 23:36:41,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:41,816 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 395 transitions. [2024-11-23 23:36:41,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-23 23:36:41,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:41,817 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:41,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:36:41,817 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:41,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1643890467, now seen corresponding path program 1 times [2024-11-23 23:36:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:41,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520823463] [2024-11-23 23:36:41,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:36:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520823463] [2024-11-23 23:36:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520823463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:42,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:42,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:36:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386051006] [2024-11-23 23:36:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:42,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:36:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:42,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:36:42,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:36:42,907 INFO L87 Difference]: Start difference. First operand 367 states and 395 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:46,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:50,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:54,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:36:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:36:56,170 INFO L93 Difference]: Finished difference Result 440 states and 476 transitions. [2024-11-23 23:36:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:36:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2024-11-23 23:36:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:36:56,173 INFO L225 Difference]: With dead ends: 440 [2024-11-23 23:36:56,174 INFO L226 Difference]: Without dead ends: 440 [2024-11-23 23:36:56,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:36:56,175 INFO L435 NwaCegarLoop]: 289 mSDtfsCounter, 374 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:36:56,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 932 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 802 Invalid, 3 Unknown, 0 Unchecked, 13.2s Time] [2024-11-23 23:36:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2024-11-23 23:36:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 381. [2024-11-23 23:36:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 237 states have (on average 1.7004219409282701) internal successors, (403), 370 states have internal predecessors, (403), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:36:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 417 transitions. [2024-11-23 23:36:56,189 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 417 transitions. Word has length 59 [2024-11-23 23:36:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:36:56,189 INFO L471 AbstractCegarLoop]: Abstraction has 381 states and 417 transitions. [2024-11-23 23:36:56,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:36:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 417 transitions. [2024-11-23 23:36:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-23 23:36:56,192 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:36:56,192 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:36:56,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:36:56,192 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:36:56,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:36:56,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1643887170, now seen corresponding path program 1 times [2024-11-23 23:36:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:36:56,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294465895] [2024-11-23 23:36:56,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:36:56,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:36:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:36:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:36:56,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:36:56,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294465895] [2024-11-23 23:36:56,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294465895] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:36:56,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:36:56,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:36:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279649773] [2024-11-23 23:36:56,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:36:56,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:36:56,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:36:56,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:36:56,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:36:56,937 INFO L87 Difference]: Start difference. First operand 381 states and 417 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:00,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:04,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:37:05,579 INFO L93 Difference]: Finished difference Result 431 states and 472 transitions. [2024-11-23 23:37:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:37:05,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2024-11-23 23:37:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:37:05,581 INFO L225 Difference]: With dead ends: 431 [2024-11-23 23:37:05,582 INFO L226 Difference]: Without dead ends: 431 [2024-11-23 23:37:05,582 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:37:05,582 INFO L435 NwaCegarLoop]: 271 mSDtfsCounter, 263 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:37:05,582 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 560 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 322 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2024-11-23 23:37:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2024-11-23 23:37:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 379. [2024-11-23 23:37:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 237 states have (on average 1.6919831223628692) internal successors, (401), 368 states have internal predecessors, (401), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:37:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 415 transitions. [2024-11-23 23:37:05,597 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 415 transitions. Word has length 59 [2024-11-23 23:37:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:37:05,597 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 415 transitions. [2024-11-23 23:37:05,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 415 transitions. [2024-11-23 23:37:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-23 23:37:05,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:37:05,598 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:05,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:37:05,599 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:37:05,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:05,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1643887169, now seen corresponding path program 1 times [2024-11-23 23:37:05,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:05,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347061988] [2024-11-23 23:37:05,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:37:06,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:06,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347061988] [2024-11-23 23:37:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347061988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:06,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:37:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940247302] [2024-11-23 23:37:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:06,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:37:06,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:06,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:37:06,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:37:06,461 INFO L87 Difference]: Start difference. First operand 379 states and 415 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:37:06,641 INFO L93 Difference]: Finished difference Result 385 states and 415 transitions. [2024-11-23 23:37:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:37:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2024-11-23 23:37:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:37:06,643 INFO L225 Difference]: With dead ends: 385 [2024-11-23 23:37:06,643 INFO L226 Difference]: Without dead ends: 385 [2024-11-23 23:37:06,644 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:37:06,644 INFO L435 NwaCegarLoop]: 333 mSDtfsCounter, 211 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:37:06,644 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1463 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 23:37:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-23 23:37:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 379. [2024-11-23 23:37:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 237 states have (on average 1.6877637130801688) internal successors, (400), 368 states have internal predecessors, (400), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:37:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 414 transitions. [2024-11-23 23:37:06,660 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 414 transitions. Word has length 59 [2024-11-23 23:37:06,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:37:06,661 INFO L471 AbstractCegarLoop]: Abstraction has 379 states and 414 transitions. [2024-11-23 23:37:06,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:06,662 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 414 transitions. [2024-11-23 23:37:06,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-23 23:37:06,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:37:06,664 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:06,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:37:06,665 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:37:06,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1923495471, now seen corresponding path program 1 times [2024-11-23 23:37:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:06,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818487289] [2024-11-23 23:37:06,666 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:06,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:37:07,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:07,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818487289] [2024-11-23 23:37:07,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818487289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:07,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:07,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:37:07,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393919427] [2024-11-23 23:37:07,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:07,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:37:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:07,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:37:07,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:37:07,340 INFO L87 Difference]: Start difference. First operand 379 states and 414 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:11,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:11,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:37:11,866 INFO L93 Difference]: Finished difference Result 430 states and 469 transitions. [2024-11-23 23:37:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:37:11,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2024-11-23 23:37:11,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:37:11,869 INFO L225 Difference]: With dead ends: 430 [2024-11-23 23:37:11,869 INFO L226 Difference]: Without dead ends: 430 [2024-11-23 23:37:11,870 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:37:11,870 INFO L435 NwaCegarLoop]: 311 mSDtfsCounter, 82 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-23 23:37:11,871 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 487 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-11-23 23:37:11,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-23 23:37:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 378. [2024-11-23 23:37:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 237 states have (on average 1.6793248945147679) internal successors, (398), 367 states have internal predecessors, (398), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:37:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 412 transitions. [2024-11-23 23:37:11,881 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 412 transitions. Word has length 62 [2024-11-23 23:37:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:37:11,882 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 412 transitions. [2024-11-23 23:37:11,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 412 transitions. [2024-11-23 23:37:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-23 23:37:11,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:37:11,883 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:11,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 23:37:11,883 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:37:11,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1923495470, now seen corresponding path program 1 times [2024-11-23 23:37:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:11,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905979462] [2024-11-23 23:37:11,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:37:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905979462] [2024-11-23 23:37:13,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905979462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:13,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:13,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 23:37:13,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010032632] [2024-11-23 23:37:13,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:13,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:37:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:13,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:37:13,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:37:13,531 INFO L87 Difference]: Start difference. First operand 378 states and 412 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:17,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:21,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:25,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:29,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:33,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:37,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:37:39,415 INFO L93 Difference]: Finished difference Result 438 states and 473 transitions. [2024-11-23 23:37:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:37:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2024-11-23 23:37:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:37:39,418 INFO L225 Difference]: With dead ends: 438 [2024-11-23 23:37:39,418 INFO L226 Difference]: Without dead ends: 438 [2024-11-23 23:37:39,418 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:37:39,419 INFO L435 NwaCegarLoop]: 290 mSDtfsCounter, 141 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 8 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:37:39,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1169 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1249 Invalid, 6 Unknown, 0 Unchecked, 25.7s Time] [2024-11-23 23:37:39,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-23 23:37:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 378. [2024-11-23 23:37:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 237 states have (on average 1.6751054852320675) internal successors, (397), 367 states have internal predecessors, (397), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:37:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 411 transitions. [2024-11-23 23:37:39,431 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 411 transitions. Word has length 62 [2024-11-23 23:37:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:37:39,431 INFO L471 AbstractCegarLoop]: Abstraction has 378 states and 411 transitions. [2024-11-23 23:37:39,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 411 transitions. [2024-11-23 23:37:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-23 23:37:39,432 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:37:39,433 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:39,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:37:39,433 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:37:39,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 600421347, now seen corresponding path program 1 times [2024-11-23 23:37:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234105853] [2024-11-23 23:37:39,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:37:40,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:40,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234105853] [2024-11-23 23:37:40,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234105853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:40,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:40,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:37:40,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82923183] [2024-11-23 23:37:40,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:40,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:37:40,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:40,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:37:40,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:37:40,502 INFO L87 Difference]: Start difference. First operand 378 states and 411 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:44,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:48,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:52,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:56,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:37:57,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:37:57,411 INFO L93 Difference]: Finished difference Result 377 states and 409 transitions. [2024-11-23 23:37:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:37:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2024-11-23 23:37:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:37:57,413 INFO L225 Difference]: With dead ends: 377 [2024-11-23 23:37:57,413 INFO L226 Difference]: Without dead ends: 377 [2024-11-23 23:37:57,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:37:57,414 INFO L435 NwaCegarLoop]: 329 mSDtfsCounter, 178 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:37:57,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 1231 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 657 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2024-11-23 23:37:57,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-11-23 23:37:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2024-11-23 23:37:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 237 states have (on average 1.6666666666666667) internal successors, (395), 366 states have internal predecessors, (395), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:37:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 409 transitions. [2024-11-23 23:37:57,423 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 409 transitions. Word has length 65 [2024-11-23 23:37:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:37:57,424 INFO L471 AbstractCegarLoop]: Abstraction has 377 states and 409 transitions. [2024-11-23 23:37:57,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:37:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 409 transitions. [2024-11-23 23:37:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-23 23:37:57,424 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:37:57,424 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:37:57,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 23:37:57,425 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:37:57,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:37:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash 600421348, now seen corresponding path program 1 times [2024-11-23 23:37:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:37:57,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86161699] [2024-11-23 23:37:57,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:37:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:37:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:37:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:37:58,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:37:58,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86161699] [2024-11-23 23:37:58,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86161699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:37:58,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:37:58,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 23:37:58,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38155998] [2024-11-23 23:37:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:37:58,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:37:58,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:37:58,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:37:58,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 23:37:58,846 INFO L87 Difference]: Start difference. First operand 377 states and 409 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:02,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:06,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:07,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:38:07,625 INFO L93 Difference]: Finished difference Result 376 states and 407 transitions. [2024-11-23 23:38:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:38:07,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2024-11-23 23:38:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:38:07,627 INFO L225 Difference]: With dead ends: 376 [2024-11-23 23:38:07,627 INFO L226 Difference]: Without dead ends: 376 [2024-11-23 23:38:07,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:38:07,628 INFO L435 NwaCegarLoop]: 329 mSDtfsCounter, 180 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-23 23:38:07,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1076 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 495 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-23 23:38:07,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-23 23:38:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2024-11-23 23:38:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 237 states have (on average 1.6582278481012658) internal successors, (393), 365 states have internal predecessors, (393), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:38:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2024-11-23 23:38:07,642 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 65 [2024-11-23 23:38:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:38:07,642 INFO L471 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2024-11-23 23:38:07,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2024-11-23 23:38:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-23 23:38:07,643 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:38:07,643 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:07,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 23:38:07,644 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:38:07,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash -599896390, now seen corresponding path program 1 times [2024-11-23 23:38:07,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:07,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698420279] [2024-11-23 23:38:07,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:07,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:38:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:09,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698420279] [2024-11-23 23:38:09,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698420279] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:09,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:09,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 23:38:09,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488382299] [2024-11-23 23:38:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:09,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 23:38:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:09,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 23:38:09,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:38:09,114 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:13,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:17,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:21,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:25,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:29,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:38:30,462 INFO L93 Difference]: Finished difference Result 438 states and 478 transitions. [2024-11-23 23:38:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:38:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2024-11-23 23:38:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:38:30,464 INFO L225 Difference]: With dead ends: 438 [2024-11-23 23:38:30,464 INFO L226 Difference]: Without dead ends: 438 [2024-11-23 23:38:30,464 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:38:30,465 INFO L435 NwaCegarLoop]: 300 mSDtfsCounter, 317 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2024-11-23 23:38:30,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1556 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1027 Invalid, 5 Unknown, 0 Unchecked, 21.2s Time] [2024-11-23 23:38:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-11-23 23:38:30,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 384. [2024-11-23 23:38:30,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 245 states have (on average 1.6571428571428573) internal successors, (406), 373 states have internal predecessors, (406), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:38:30,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 420 transitions. [2024-11-23 23:38:30,478 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 420 transitions. Word has length 70 [2024-11-23 23:38:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:38:30,479 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 420 transitions. [2024-11-23 23:38:30,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:30,479 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 420 transitions. [2024-11-23 23:38:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-23 23:38:30,480 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:38:30,480 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:30,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-23 23:38:30,480 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:38:30,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:30,481 INFO L85 PathProgramCache]: Analyzing trace with hash -599896389, now seen corresponding path program 1 times [2024-11-23 23:38:30,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:30,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382541163] [2024-11-23 23:38:30,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:38:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:32,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382541163] [2024-11-23 23:38:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382541163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:38:32,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:38:32,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-23 23:38:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355604227] [2024-11-23 23:38:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:38:32,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:38:32,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:38:32,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:38:32,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:38:32,323 INFO L87 Difference]: Start difference. First operand 384 states and 420 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:36,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:40,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:44,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:48,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:52,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:56,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-23 23:38:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:38:58,096 INFO L93 Difference]: Finished difference Result 436 states and 473 transitions. [2024-11-23 23:38:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:38:58,097 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2024-11-23 23:38:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:38:58,099 INFO L225 Difference]: With dead ends: 436 [2024-11-23 23:38:58,099 INFO L226 Difference]: Without dead ends: 436 [2024-11-23 23:38:58,099 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:38:58,100 INFO L435 NwaCegarLoop]: 300 mSDtfsCounter, 313 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 9 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2024-11-23 23:38:58,100 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1707 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1215 Invalid, 6 Unknown, 0 Unchecked, 25.6s Time] [2024-11-23 23:38:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-11-23 23:38:58,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 384. [2024-11-23 23:38:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 245 states have (on average 1.6408163265306122) internal successors, (402), 373 states have internal predecessors, (402), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-23 23:38:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 416 transitions. [2024-11-23 23:38:58,111 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 416 transitions. Word has length 70 [2024-11-23 23:38:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:38:58,111 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 416 transitions. [2024-11-23 23:38:58,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 11 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-23 23:38:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 416 transitions. [2024-11-23 23:38:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-23 23:38:58,112 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:38:58,112 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:38:58,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-23 23:38:58,113 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [bb_error_msg_and_dieErr0ASSERT_VIOLATIONUNSUPPORTED_FEATURE, bb_error_msg_and_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, bb_error_msg_and_dieErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 208 more)] === [2024-11-23 23:38:58,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:38:58,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2039778860, now seen corresponding path program 1 times [2024-11-23 23:38:58,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:38:58,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440715383] [2024-11-23 23:38:58,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:58,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:38:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:38:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-11-23 23:38:59,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:38:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440715383] [2024-11-23 23:38:59,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440715383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:38:59,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91180937] [2024-11-23 23:38:59,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:38:59,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:38:59,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:38:59,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:38:59,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83818c8d-4d46-41c1-95e8-6fdb6423c06f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:39:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:39:00,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 1553 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:39:00,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:39:00,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-23 23:39:00,472 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-23 23:39:00,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-23 23:39:00,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 23:39:00,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-23 23:39:00,872 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-11-23 23:39:00,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2024-11-23 23:39:01,005 INFO L349 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2024-11-23 23:39:01,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2024-11-23 23:39:01,054 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 37 treesize of output 13 [2024-11-23 23:39:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-23 23:39:01,179 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:39:01,374 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5228 (Array Int Int)) (v_ArrVal_5229 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (+ (* |c_ULTIMATE.start_main_~i~3#1| 8) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem197#1.base| v_ArrVal_5228))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_5229)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) 1)) is different from false [2024-11-23 23:39:01,390 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5228 (Array Int Int)) (v_ArrVal_5229 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (+ (* |c_ULTIMATE.start_main_~i~3#1| 8) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_5228))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_5229)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) 1)) is different from false [2024-11-23 23:39:01,416 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5228 (Array Int Int)) (v_ArrVal_5227 (Array Int Int)) (v_ArrVal_5229 (Array Int Int))) (= (select |c_#valid| (let ((.cse1 (+ (* |c_ULTIMATE.start_main_~i~3#1| 8) |c_ULTIMATE.start_main_~argv~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~mem_track~0#1.base| v_ArrVal_5227))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_5228)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1) v_ArrVal_5229)) |c_ULTIMATE.start_main_~argv~0#1.base|) .cse1))) 1)) is different from false [2024-11-23 23:39:01,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:39:01,450 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 71 [2024-11-23 23:39:01,460 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 5374 treesize of output 4198 [2024-11-23 23:39:01,642 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 879 treesize of output 687 [2024-11-23 23:39:01,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 687 treesize of output 615 [2024-11-23 23:39:01,681 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 615 treesize of output 483 [2024-11-23 23:39:07,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:39:07,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 245 treesize of output 1575