/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 13:33:43,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 13:33:43,199 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 13:33:43,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 13:33:43,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 13:33:43,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 13:33:43,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 13:33:43,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 13:33:43,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 13:33:43,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 13:33:43,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 13:33:43,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 13:33:43,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 13:33:43,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 13:33:43,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 13:33:43,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 13:33:43,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 13:33:43,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 13:33:43,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 13:33:43,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 13:33:43,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 13:33:43,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 13:33:43,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 13:33:43,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 13:33:43,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 13:33:43,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 13:33:43,266 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 13:33:43,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 13:33:43,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 13:33:43,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 13:33:43,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 13:33:43,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 13:33:43,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 13:33:43,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 13:33:43,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 13:33:43,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 13:33:43,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 13:33:43,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 13:33:43,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 13:33:43,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 13:33:43,271 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 13:33:43,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 13:33:43,304 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 13:33:43,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 13:33:43,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 13:33:43,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 13:33:43,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 13:33:43,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 13:33:43,305 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 13:33:43,306 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 13:33:43,306 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 13:33:43,306 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 13:33:43,306 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 13:33:43,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 13:33:43,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 13:33:43,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 13:33:43,307 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 13:33:43,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 13:33:43,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 13:33:43,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 13:33:43,309 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 13:33:43,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 13:33:43,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 13:33:43,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 13:33:43,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 13:33:43,506 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 13:33:43,507 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 13:33:43,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-04-01 13:33:44,476 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 13:33:44,805 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 13:33:44,806 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-04-01 13:33:44,832 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e6b7503/8da4731315744d919a24451abd886e70/FLAGb95d53281 [2023-04-01 13:33:44,845 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57e6b7503/8da4731315744d919a24451abd886e70 [2023-04-01 13:33:44,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 13:33:44,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 13:33:44,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 13:33:44,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 13:33:44,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 13:33:44,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 01:33:44" (1/1) ... [2023-04-01 13:33:44,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53cedb2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:44, skipping insertion in model container [2023-04-01 13:33:44,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 01:33:44" (1/1) ... [2023-04-01 13:33:44,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 13:33:44,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 13:33:45,518 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2023-04-01 13:33:45,533 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 13:33:45,552 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 13:33:45,773 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2023-04-01 13:33:45,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 13:33:45,818 INFO L208 MainTranslator]: Completed translation [2023-04-01 13:33:45,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45 WrapperNode [2023-04-01 13:33:45,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 13:33:45,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 13:33:45,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 13:33:45,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 13:33:45,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,964 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:45,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 13:33:45,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 13:33:45,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 13:33:45,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 13:33:45,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (1/1) ... [2023-04-01 13:33:46,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 13:33:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:33:46,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 13:33:46,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 13:33:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 13:33:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 13:33:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_insert_flip_string_4 [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2023-04-01 13:33:46,072 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_out [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_startup [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_release [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_open [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_close [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_read_int_callback [2023-04-01 13:33:46,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_callback [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2023-04-01 13:33:46,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init [2023-04-01 13:33:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_exit [2023-04-01 13:33:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_usb_serial_driver_1 [2023-04-01 13:33:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_2 [2023-04-01 13:33:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 13:33:46,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_insert_flip_string_flags_3 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_insert_flip_string [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_insert_flip_string_fixed_flag_5 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_6 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_port_tty_get_7 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_flip_buffer_push_8 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_get_baud_rate_9 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_tty_encode_baud_rate_10 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_11 [2023-04-01 13:33:46,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_got_tty [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_probe_1 [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_encode_baud_rate [2023-04-01 13:33:46,077 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_flip_buffer_push [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_get_baud_rate [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_insert_flip_string_fixed_flag [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_insert_flip_string_flags [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-04-01 13:33:46,078 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-04-01 13:33:46,079 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-01 13:33:46,080 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure tty_flip_buffer_push [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_flip_buffer_push_8 [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure tty_get_baud_rate [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_get_baud_rate_9 [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure tty_encode_baud_rate [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_encode_baud_rate_10 [2023-04-01 13:33:46,080 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_port_tty_get_7 [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure tty_insert_flip_string_flags [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_insert_flip_string_flags_3 [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure tty_insert_flip_string_fixed_flag [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_insert_flip_string_fixed_flag_5 [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_tty_insert_flip_string_4 [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure tty_insert_flip_string [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_got_tty [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-04-01 13:33:46,081 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2023-04-01 13:33:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-04-01 13:33:46,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-04-01 13:33:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-04-01 13:33:46,083 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 13:33:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 13:33:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_usb_serial_driver_1 [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_2 [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2023-04-01 13:33:46,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_out [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_6 [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_11 [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2023-04-01 13:33:46,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_startup [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_release [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_open [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_close [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2023-04-01 13:33:46,092 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_read_int_callback [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_callback [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_exit [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_probe_1 [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-04-01 13:33:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-04-01 13:33:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-04-01 13:33:46,563 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 13:33:46,566 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 13:33:46,842 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-04-01 13:33:50,418 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 13:33:50,808 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 13:33:50,809 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 13:33:50,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 01:33:50 BoogieIcfgContainer [2023-04-01 13:33:50,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 13:33:50,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 13:33:50,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 13:33:50,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 13:33:50,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 01:33:44" (1/3) ... [2023-04-01 13:33:50,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491062e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 01:33:50, skipping insertion in model container [2023-04-01 13:33:50,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 01:33:45" (2/3) ... [2023-04-01 13:33:50,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1491062e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 01:33:50, skipping insertion in model container [2023-04-01 13:33:50,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 01:33:50" (3/3) ... [2023-04-01 13:33:50,816 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-04-01 13:33:50,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 13:33:50,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 13:33:50,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 13:33:50,915 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7fd9b4dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 13:33:50,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 13:33:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 746 states, 456 states have (on average 1.3179824561403508) internal successors, (601), 468 states have internal predecessors, (601), 205 states have call successors, (205), 81 states have call predecessors, (205), 80 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2023-04-01 13:33:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-04-01 13:33:50,948 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:50,949 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1] [2023-04-01 13:33:50,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:50,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:50,954 INFO L85 PathProgramCache]: Analyzing trace with hash -920510213, now seen corresponding path program 1 times [2023-04-01 13:33:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:50,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352164159] [2023-04-01 13:33:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:50,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-04-01 13:33:51,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:33:51,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352164159] [2023-04-01 13:33:51,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352164159] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:33:51,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 13:33:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 13:33:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177300906] [2023-04-01 13:33:51,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:33:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 13:33:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:33:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 13:33:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 13:33:51,459 INFO L87 Difference]: Start difference. First operand has 746 states, 456 states have (on average 1.3179824561403508) internal successors, (601), 468 states have internal predecessors, (601), 205 states have call successors, (205), 81 states have call predecessors, (205), 80 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-01 13:33:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:33:52,160 INFO L93 Difference]: Finished difference Result 1529 states and 2076 transitions. [2023-04-01 13:33:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 13:33:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 143 [2023-04-01 13:33:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:33:52,177 INFO L225 Difference]: With dead ends: 1529 [2023-04-01 13:33:52,177 INFO L226 Difference]: Without dead ends: 789 [2023-04-01 13:33:52,182 INFO L412 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 [2023-04-01 13:33:52,184 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 173 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1642 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 13:33:52,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1642 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 13:33:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-04-01 13:33:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 789. [2023-04-01 13:33:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 495 states have (on average 1.307070707070707) internal successors, (647), 500 states have internal predecessors, (647), 206 states have call successors, (206), 89 states have call predecessors, (206), 87 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2023-04-01 13:33:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1057 transitions. [2023-04-01 13:33:52,246 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1057 transitions. Word has length 143 [2023-04-01 13:33:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:33:52,247 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1057 transitions. [2023-04-01 13:33:52,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-04-01 13:33:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1057 transitions. [2023-04-01 13:33:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-04-01 13:33:52,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:52,250 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 13:33:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 13:33:52,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:52,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2115359505, now seen corresponding path program 1 times [2023-04-01 13:33:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604696975] [2023-04-01 13:33:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2023-04-01 13:33:52,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:33:52,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604696975] [2023-04-01 13:33:52,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604696975] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:33:52,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 13:33:52,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 13:33:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708072213] [2023-04-01 13:33:52,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:33:52,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 13:33:52,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:33:52,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 13:33:52,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 13:33:52,646 INFO L87 Difference]: Start difference. First operand 789 states and 1057 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-01 13:33:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:33:53,297 INFO L93 Difference]: Finished difference Result 1809 states and 2434 transitions. [2023-04-01 13:33:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 13:33:53,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 207 [2023-04-01 13:33:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:33:53,302 INFO L225 Difference]: With dead ends: 1809 [2023-04-01 13:33:53,302 INFO L226 Difference]: Without dead ends: 1064 [2023-04-01 13:33:53,304 INFO L412 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 [2023-04-01 13:33:53,304 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 359 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 13:33:53,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1693 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 13:33:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-04-01 13:33:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1061. [2023-04-01 13:33:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 682 states have (on average 1.2947214076246334) internal successors, (883), 688 states have internal predecessors, (883), 258 states have call successors, (258), 122 states have call predecessors, (258), 120 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2023-04-01 13:33:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1397 transitions. [2023-04-01 13:33:53,334 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1397 transitions. Word has length 207 [2023-04-01 13:33:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:33:53,334 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1397 transitions. [2023-04-01 13:33:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2023-04-01 13:33:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1397 transitions. [2023-04-01 13:33:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-04-01 13:33:53,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:53,340 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 13:33:53,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 13:33:53,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:53,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2011523978, now seen corresponding path program 1 times [2023-04-01 13:33:53,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:53,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784220126] [2023-04-01 13:33:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-04-01 13:33:53,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:33:53,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784220126] [2023-04-01 13:33:53,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784220126] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:33:53,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 13:33:53,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 13:33:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709872521] [2023-04-01 13:33:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:33:53,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 13:33:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:33:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 13:33:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 13:33:53,706 INFO L87 Difference]: Start difference. First operand 1061 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 13:33:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:33:54,521 INFO L93 Difference]: Finished difference Result 2038 states and 2694 transitions. [2023-04-01 13:33:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 13:33:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 208 [2023-04-01 13:33:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:33:54,530 INFO L225 Difference]: With dead ends: 2038 [2023-04-01 13:33:54,530 INFO L226 Difference]: Without dead ends: 2035 [2023-04-01 13:33:54,531 INFO L412 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 [2023-04-01 13:33:54,532 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 836 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 13:33:54,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1722 Invalid, 188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 13:33:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2023-04-01 13:33:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 2032. [2023-04-01 13:33:54,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 1319 states have (on average 1.3002274450341167) internal successors, (1715), 1331 states have internal predecessors, (1715), 486 states have call successors, (486), 229 states have call predecessors, (486), 226 states have return successors, (485), 482 states have call predecessors, (485), 484 states have call successors, (485) [2023-04-01 13:33:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2686 transitions. [2023-04-01 13:33:54,613 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2686 transitions. Word has length 208 [2023-04-01 13:33:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:33:54,614 INFO L495 AbstractCegarLoop]: Abstraction has 2032 states and 2686 transitions. [2023-04-01 13:33:54,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-04-01 13:33:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2686 transitions. [2023-04-01 13:33:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 13:33:54,617 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:54,618 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1] [2023-04-01 13:33:54,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 13:33:54,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:54,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash 166197338, now seen corresponding path program 1 times [2023-04-01 13:33:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803701494] [2023-04-01 13:33:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-04-01 13:33:54,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:33:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803701494] [2023-04-01 13:33:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803701494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:33:54,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 13:33:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 13:33:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143395214] [2023-04-01 13:33:54,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:33:54,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 13:33:54,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:33:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 13:33:54,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 13:33:54,829 INFO L87 Difference]: Start difference. First operand 2032 states and 2686 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 13:33:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:33:55,713 INFO L93 Difference]: Finished difference Result 4567 states and 6065 transitions. [2023-04-01 13:33:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 13:33:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 230 [2023-04-01 13:33:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:33:55,724 INFO L225 Difference]: With dead ends: 4567 [2023-04-01 13:33:55,724 INFO L226 Difference]: Without dead ends: 2579 [2023-04-01 13:33:55,730 INFO L412 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 [2023-04-01 13:33:55,731 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 452 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 13:33:55,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1769 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 13:33:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2023-04-01 13:33:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 2576. [2023-04-01 13:33:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 1693 states have (on average 1.2911990549320733) internal successors, (2186), 1707 states have internal predecessors, (2186), 590 states have call successors, (590), 295 states have call predecessors, (590), 292 states have return successors, (589), 586 states have call predecessors, (589), 588 states have call successors, (589) [2023-04-01 13:33:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3365 transitions. [2023-04-01 13:33:55,852 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3365 transitions. Word has length 230 [2023-04-01 13:33:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:33:55,853 INFO L495 AbstractCegarLoop]: Abstraction has 2576 states and 3365 transitions. [2023-04-01 13:33:55,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-04-01 13:33:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3365 transitions. [2023-04-01 13:33:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 13:33:55,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:55,858 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 13:33:55,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 13:33:55,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:55,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:55,859 INFO L85 PathProgramCache]: Analyzing trace with hash -783511330, now seen corresponding path program 1 times [2023-04-01 13:33:55,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:55,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721952303] [2023-04-01 13:33:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:55,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-04-01 13:33:56,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:33:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721952303] [2023-04-01 13:33:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721952303] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:33:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108079802] [2023-04-01 13:33:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:56,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:33:56,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:33:56,573 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:33:56,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 13:33:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:33:57,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 2693 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 13:33:57,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:33:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 13:33:57,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 13:33:57,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108079802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:33:57,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 13:33:57,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-04-01 13:33:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935879003] [2023-04-01 13:33:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:33:57,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 13:33:57,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:33:57,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 13:33:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 13:33:57,270 INFO L87 Difference]: Start difference. First operand 2576 states and 3365 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2023-04-01 13:33:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:33:59,401 INFO L93 Difference]: Finished difference Result 7658 states and 9985 transitions. [2023-04-01 13:33:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 13:33:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) Word has length 256 [2023-04-01 13:33:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:33:59,457 INFO L225 Difference]: With dead ends: 7658 [2023-04-01 13:33:59,457 INFO L226 Difference]: Without dead ends: 5006 [2023-04-01 13:33:59,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-04-01 13:33:59,462 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 891 mSDsluCounter, 5822 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 7482 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 13:33:59,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 7482 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 13:33:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2023-04-01 13:33:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4924. [2023-04-01 13:33:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4924 states, 3249 states have (on average 1.2868574946137272) internal successors, (4181), 3266 states have internal predecessors, (4181), 1125 states have call successors, (1125), 553 states have call predecessors, (1125), 549 states have return successors, (1125), 1112 states have call predecessors, (1125), 1123 states have call successors, (1125) [2023-04-01 13:33:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4924 states to 4924 states and 6431 transitions. [2023-04-01 13:33:59,657 INFO L78 Accepts]: Start accepts. Automaton has 4924 states and 6431 transitions. Word has length 256 [2023-04-01 13:33:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:33:59,657 INFO L495 AbstractCegarLoop]: Abstraction has 4924 states and 6431 transitions. [2023-04-01 13:33:59,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (39), 2 states have call predecessors, (39), 3 states have return successors, (34), 3 states have call predecessors, (34), 2 states have call successors, (34) [2023-04-01 13:33:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 4924 states and 6431 transitions. [2023-04-01 13:33:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-04-01 13:33:59,661 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:33:59,662 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 13:33:59,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 13:33:59,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:33:59,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:33:59,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:33:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 570920512, now seen corresponding path program 1 times [2023-04-01 13:33:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:33:59,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291500532] [2023-04-01 13:33:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:33:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:33:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2023-04-01 13:34:00,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291500532] [2023-04-01 13:34:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291500532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:34:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144144560] [2023-04-01 13:34:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:34:00,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:34:00,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 13:34:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:01,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 2930 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 13:34:01,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:34:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2023-04-01 13:34:01,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 13:34:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144144560] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:34:01,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 13:34:01,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 13:34:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845414174] [2023-04-01 13:34:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:34:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 13:34:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:34:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 13:34:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:01,123 INFO L87 Difference]: Start difference. First operand 4924 states and 6431 transitions. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-01 13:34:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:34:02,319 INFO L93 Difference]: Finished difference Result 10305 states and 13548 transitions. [2023-04-01 13:34:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 13:34:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) Word has length 288 [2023-04-01 13:34:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:34:02,342 INFO L225 Difference]: With dead ends: 10305 [2023-04-01 13:34:02,343 INFO L226 Difference]: Without dead ends: 5425 [2023-04-01 13:34:02,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:02,354 INFO L413 NwaCegarLoop]: 1099 mSDtfsCounter, 427 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 13:34:02,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2176 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 13:34:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5425 states. [2023-04-01 13:34:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5425 to 5234. [2023-04-01 13:34:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 3499 states have (on average 1.2966561874821378) internal successors, (4537), 3516 states have internal predecessors, (4537), 1153 states have call successors, (1153), 581 states have call predecessors, (1153), 581 states have return successors, (1157), 1144 states have call predecessors, (1157), 1151 states have call successors, (1157) [2023-04-01 13:34:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6847 transitions. [2023-04-01 13:34:02,604 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6847 transitions. Word has length 288 [2023-04-01 13:34:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:34:02,604 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6847 transitions. [2023-04-01 13:34:02,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 4 states have internal predecessors, (117), 3 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (38), 4 states have call predecessors, (38), 3 states have call successors, (38) [2023-04-01 13:34:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6847 transitions. [2023-04-01 13:34:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-04-01 13:34:02,610 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:34:02,610 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2023-04-01 13:34:02,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 13:34:02,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 13:34:02,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:34:02,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:34:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1927265513, now seen corresponding path program 1 times [2023-04-01 13:34:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:34:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739186558] [2023-04-01 13:34:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:02,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:34:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-04-01 13:34:03,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739186558] [2023-04-01 13:34:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739186558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:34:03,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 13:34:03,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 13:34:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121636780] [2023-04-01 13:34:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:34:03,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 13:34:03,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:34:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 13:34:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 13:34:03,220 INFO L87 Difference]: Start difference. First operand 5234 states and 6847 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (41), 3 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-01 13:34:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:34:04,420 INFO L93 Difference]: Finished difference Result 11517 states and 15114 transitions. [2023-04-01 13:34:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 13:34:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (41), 3 states have call predecessors, (41), 2 states have call successors, (41) Word has length 304 [2023-04-01 13:34:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:34:04,447 INFO L225 Difference]: With dead ends: 11517 [2023-04-01 13:34:04,447 INFO L226 Difference]: Without dead ends: 6327 [2023-04-01 13:34:04,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 13:34:04,461 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 472 mSDsluCounter, 2828 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 3930 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 13:34:04,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 3930 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 13:34:04,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6327 states. [2023-04-01 13:34:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6327 to 6324. [2023-04-01 13:34:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 4245 states have (on average 1.2878680800942286) internal successors, (5467), 4264 states have internal predecessors, (5467), 1357 states have call successors, (1357), 721 states have call predecessors, (1357), 721 states have return successors, (1361), 1346 states have call predecessors, (1361), 1355 states have call successors, (1361) [2023-04-01 13:34:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 8185 transitions. [2023-04-01 13:34:04,687 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 8185 transitions. Word has length 304 [2023-04-01 13:34:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:34:04,689 INFO L495 AbstractCegarLoop]: Abstraction has 6324 states and 8185 transitions. [2023-04-01 13:34:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (41), 3 states have call predecessors, (41), 2 states have call successors, (41) [2023-04-01 13:34:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 8185 transitions. [2023-04-01 13:34:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2023-04-01 13:34:04,696 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:34:04,697 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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] [2023-04-01 13:34:04,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 13:34:04,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:34:04,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:34:04,697 INFO L85 PathProgramCache]: Analyzing trace with hash 166710968, now seen corresponding path program 1 times [2023-04-01 13:34:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:34:04,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848234147] [2023-04-01 13:34:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:04,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:34:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-04-01 13:34:05,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848234147] [2023-04-01 13:34:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848234147] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:34:05,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039960727] [2023-04-01 13:34:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:05,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:05,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:34:05,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:34:05,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 13:34:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:06,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 3304 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 13:34:06,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:34:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-04-01 13:34:06,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 13:34:06,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039960727] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:34:06,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 13:34:06,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 13:34:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857948995] [2023-04-01 13:34:06,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:34:06,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 13:34:06,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:34:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 13:34:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:06,171 INFO L87 Difference]: Start difference. First operand 6324 states and 8185 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (54), 3 states have call predecessors, (54), 4 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2023-04-01 13:34:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:34:08,052 INFO L93 Difference]: Finished difference Result 13543 states and 17576 transitions. [2023-04-01 13:34:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 13:34:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (54), 3 states have call predecessors, (54), 4 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) Word has length 353 [2023-04-01 13:34:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:34:08,108 INFO L225 Difference]: With dead ends: 13543 [2023-04-01 13:34:08,108 INFO L226 Difference]: Without dead ends: 7263 [2023-04-01 13:34:08,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:08,129 INFO L413 NwaCegarLoop]: 1108 mSDtfsCounter, 431 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 2782 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 13:34:08,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 2782 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 13:34:08,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7263 states. [2023-04-01 13:34:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7263 to 6630. [2023-04-01 13:34:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 4491 states have (on average 1.295702516143398) internal successors, (5819), 4510 states have internal predecessors, (5819), 1385 states have call successors, (1385), 749 states have call predecessors, (1385), 753 states have return successors, (1393), 1378 states have call predecessors, (1393), 1383 states have call successors, (1393) [2023-04-01 13:34:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 8597 transitions. [2023-04-01 13:34:08,398 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 8597 transitions. Word has length 353 [2023-04-01 13:34:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:34:08,399 INFO L495 AbstractCegarLoop]: Abstraction has 6630 states and 8597 transitions. [2023-04-01 13:34:08,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 3 states have call successors, (54), 3 states have call predecessors, (54), 4 states have return successors, (49), 4 states have call predecessors, (49), 3 states have call successors, (49) [2023-04-01 13:34:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 8597 transitions. [2023-04-01 13:34:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2023-04-01 13:34:08,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:34:08,409 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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] [2023-04-01 13:34:08,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 13:34:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:08,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:34:08,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:34:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1885620488, now seen corresponding path program 1 times [2023-04-01 13:34:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:34:08,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441279617] [2023-04-01 13:34:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:34:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2023-04-01 13:34:09,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441279617] [2023-04-01 13:34:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441279617] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:34:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387799166] [2023-04-01 13:34:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:34:09,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:34:09,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 13:34:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:10,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 3611 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 13:34:10,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:34:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-04-01 13:34:10,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 13:34:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387799166] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:34:10,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 13:34:10,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2023-04-01 13:34:10,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306346443] [2023-04-01 13:34:10,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:34:10,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 13:34:10,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:34:10,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 13:34:10,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:10,297 INFO L87 Difference]: Start difference. First operand 6630 states and 8597 transitions. Second operand has 6 states, 4 states have (on average 40.0) internal successors, (160), 5 states have internal predecessors, (160), 3 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2023-04-01 13:34:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:34:11,698 INFO L93 Difference]: Finished difference Result 13286 states and 17245 transitions. [2023-04-01 13:34:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 13:34:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 40.0) internal successors, (160), 5 states have internal predecessors, (160), 3 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 399 [2023-04-01 13:34:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:34:11,715 INFO L225 Difference]: With dead ends: 13286 [2023-04-01 13:34:11,715 INFO L226 Difference]: Without dead ends: 6664 [2023-04-01 13:34:11,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 13:34:11,726 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 0 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4268 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 13:34:11,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4268 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 13:34:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6664 states. [2023-04-01 13:34:11,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6664 to 6632. [2023-04-01 13:34:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6632 states, 4492 states have (on average 1.2956366874443455) internal successors, (5820), 4512 states have internal predecessors, (5820), 1385 states have call successors, (1385), 749 states have call predecessors, (1385), 754 states have return successors, (1394), 1378 states have call predecessors, (1394), 1383 states have call successors, (1394) [2023-04-01 13:34:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 8599 transitions. [2023-04-01 13:34:11,907 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 8599 transitions. Word has length 399 [2023-04-01 13:34:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:34:11,907 INFO L495 AbstractCegarLoop]: Abstraction has 6632 states and 8599 transitions. [2023-04-01 13:34:11,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 40.0) internal successors, (160), 5 states have internal predecessors, (160), 3 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2023-04-01 13:34:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 8599 transitions. [2023-04-01 13:34:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-04-01 13:34:11,917 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:34:11,917 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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] [2023-04-01 13:34:11,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 13:34:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:12,131 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:34:12,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:34:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1000553650, now seen corresponding path program 1 times [2023-04-01 13:34:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:34:12,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053872640] [2023-04-01 13:34:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:12,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:34:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2023-04-01 13:34:12,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053872640] [2023-04-01 13:34:12,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053872640] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:34:12,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566978219] [2023-04-01 13:34:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:12,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:34:12,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:34:12,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 13:34:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:13,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 3636 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 13:34:13,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:34:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-04-01 13:34:13,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 13:34:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566978219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 13:34:13,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 13:34:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-04-01 13:34:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295711523] [2023-04-01 13:34:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 13:34:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 13:34:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 13:34:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 13:34:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-04-01 13:34:13,854 INFO L87 Difference]: Start difference. First operand 6632 states and 8599 transitions. Second operand has 6 states, 4 states have (on average 41.25) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-04-01 13:34:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 13:34:15,065 INFO L93 Difference]: Finished difference Result 13238 states and 17169 transitions. [2023-04-01 13:34:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 13:34:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 41.25) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 403 [2023-04-01 13:34:15,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 13:34:15,084 INFO L225 Difference]: With dead ends: 13238 [2023-04-01 13:34:15,085 INFO L226 Difference]: Without dead ends: 6633 [2023-04-01 13:34:15,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-01 13:34:15,096 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 3 mSDsluCounter, 3399 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4253 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 13:34:15,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4253 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 13:34:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2023-04-01 13:34:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6633. [2023-04-01 13:34:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6633 states, 4493 states have (on average 1.2955708880480747) internal successors, (5821), 4513 states have internal predecessors, (5821), 1385 states have call successors, (1385), 749 states have call predecessors, (1385), 754 states have return successors, (1394), 1378 states have call predecessors, (1394), 1383 states have call successors, (1394) [2023-04-01 13:34:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6633 states to 6633 states and 8600 transitions. [2023-04-01 13:34:15,321 INFO L78 Accepts]: Start accepts. Automaton has 6633 states and 8600 transitions. Word has length 403 [2023-04-01 13:34:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 13:34:15,321 INFO L495 AbstractCegarLoop]: Abstraction has 6633 states and 8600 transitions. [2023-04-01 13:34:15,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 41.25) internal successors, (165), 6 states have internal predecessors, (165), 3 states have call successors, (62), 2 states have call predecessors, (62), 4 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2023-04-01 13:34:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6633 states and 8600 transitions. [2023-04-01 13:34:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-04-01 13:34:15,330 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 13:34:15,330 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 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, 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] [2023-04-01 13:34:15,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 13:34:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 13:34:15,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 13:34:15,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 13:34:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash -523473168, now seen corresponding path program 1 times [2023-04-01 13:34:15,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 13:34:15,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698028801] [2023-04-01 13:34:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:15,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 13:34:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-04-01 13:34:16,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 13:34:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698028801] [2023-04-01 13:34:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698028801] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 13:34:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746413734] [2023-04-01 13:34:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 13:34:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 13:34:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 13:34:16,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 13:34:16,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 13:34:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 13:34:17,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 3711 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 13:34:17,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 13:34:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 117 proven. 17 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2023-04-01 13:34:17,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 13:34:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2023-04-01 13:34:17,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746413734] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 13:34:17,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1626212109] [2023-04-01 13:34:18,056 INFO L159 IcfgInterpreter]: Started Sifa with 240 locations of interest [2023-04-01 13:34:18,056 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 13:34:18,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 13:34:18,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 13:34:18,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs